2.4.0.8412050 - Disclosure - Derivatives, Sold and Purchased Credit Derivatives (Details)truefalseIn Millions, unless otherwise specifiedfalse1falsefalsefalseFROM_Jan01_2013_TO_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_StructuredProductsMember_us-gaap_RangeAxis_MinimumMemberhttp://www.sec.gov/CIK0000072971duration2013-01-01T00:00:002013-06-30T00:00:002falsefalsefalseFROM_Jan01_2012_TO_Dec31_2012_us-gaap_CreditDerivativesByContractTypeAxis_StructuredProductsMember_us-gaap_RangeAxis_MinimumMemberhttp://www.sec.gov/CIK0000072971duration2012-01-01T00:00:002012-12-31T00:00:001true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse02false5us-gaap_CreditDerivativeCurrentFairValueus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse20400000002040USD$falsetruefalse2truefalsefalse26230000002623USD$falsetruefalsexbrli:monetaryItemTypemonetaryDiscloses the fair value of the credit derivative (or each group of similar credit derivatives) as of the date of the statement of financial position.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false23false5us-gaap_CreditDerivativeMaximumExposureUndiscountedus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse2252700000022527USD$falsefalsefalse2truefalsefalse2645500000026455USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the maximum potential amount of future payments (undiscounted) the seller could be required to make under the credit derivative or each group of similar credit derivatives before reduction for potential recoveries under recourse or collateralization provisions in the credit derivative.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Credit Derivative
-URI http://asc.fasb.org/extlink&oid=6854095
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false24false5wfc_CreditDerivativesNotionalAmountPurchasedCreditProtectionwfc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse1187200000011872USD$falsefalsefalse2truefalsefalse1493000000014930USD$falsefalsefalsexbrli:monetaryItemTypemonetaryDescribes, in the context of the estimate of potential recoveries, any purchased credit protection with identical underlying(s).No definition available.false25false5wfc_CreditDerivativeNotionalAmountNetProtectionSoldAndPurchasedwfc_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse1065500000010655USD$falsefalsefalse2truefalsefalse1152500000011525USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCredit Derivative, Notional Amount, Net protection sold and purchased.No definition available.false26false5wfc_CreditDerivativeNotionalAmountPurchasedCreditProtectionOtherwfc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse1436500000014365USD$falsefalsefalse2truefalsefalse1398100000013981USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCredit derivative, Notional Amount, purchased credit protection other.No definition available.false27false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falseUSDtruefalse$AS_OF_Jun30_2013_us-gaap_PaymentAndPerformanceRiskCreditRatingAxis_ExternalCreditRatingNonInvestmentGradeMemberhttp://www.sec.gov/CIK0000072971instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseNon-investment Grade [Member]us-gaap_PaymentAndPerformanceRiskCreditRatingAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ExternalCreditRatingNonInvestmentGradeMemberus-gaap_PaymentAndPerformanceRiskCreditRatingAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse08true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse09false5us-gaap_CreditDerivativeMaximumExposureUndiscountedus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse1161600000011616USD$falsefalsefalse2truefalsefalse1510400000015104USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the maximum potential amount of future payments (undiscounted) the seller could be required to make under the credit derivative or each group of similar credit derivatives before reduction for potential recoveries under recourse or collateralization provisions in the credit derivative.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Credit Derivative
-URI http://asc.fasb.org/extlink&oid=6854095
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false210false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse5falseUSDtruefalse$AS_OF_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_StructuredProductsMemberhttp://www.sec.gov/CIK0000072971instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseStructured products [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldiwfc_StructuredProductsMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse011true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse012false5us-gaap_CreditDerivativeCurrentFairValueus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse14390000001439USD$falsefalsefalse2truefalsefalse17870000001787USD$falsefalsefalsexbrli:monetaryItemTypemonetaryDiscloses the fair value of the credit derivative (or each group of similar credit derivatives) as of the date of the statement of financial position.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false213false5us-gaap_CreditDerivativeMaximumExposureUndiscountedus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse19710000001971USD$falsefalsefalse2truefalsefalse24330000002433USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the maximum potential amount of future payments (undiscounted) the seller could be required to make under the credit derivative or each group of similar credit derivatives before reduction for potential recoveries under recourse or collateralization provisions in the credit derivative.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Credit Derivative
-URI http://asc.fasb.org/extlink&oid=6854095
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false214false5wfc_CreditDerivativesNotionalAmountPurchasedCreditProtectionwfc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse811000000811USD$falsefalsefalse2truefalsefalse948000000948USD$falsefalsefalsexbrli:monetaryItemTypemonetaryDescribes, in the context of the estimate of potential recoveries, any purchased credit protection with identical underlying(s).No definition available.false215false5wfc_CreditDerivativeNotionalAmountNetProtectionSoldAndPurchasedwfc_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse11600000001160USD$falsefalsefalse2truefalsefalse14850000001485USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCredit Derivative, Notional Amount, Net protection sold and purchased.No definition available.false216false5wfc_CreditDerivativeNotionalAmountPurchasedCreditProtectionOtherwfc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse364000000364USD$falsefalsefalse2truefalsefalse393000000393USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCredit derivative, Notional Amount, purchased credit protection other.No definition available.false217false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse7falsetruefalseFROM_Jan01_2013_TO_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_StructuredProductsMember_us-gaap_RangeAxis_MinimumMemberhttp://www.sec.gov/CIK0000072971duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseStructured products [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldiwfc_StructuredProductsMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberfalsefalseMinimum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MinimumMemberus-gaap_RangeAxisexplicitMembernanafalse018true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse019false5us-gaap_DerivativeMaturityDatesus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse002016-01-01falsefalsetrue2falsefalsefalse002016-01-01falsefalsetruexbrli:dateItemTypedateDate the derivative contract matures, in CCYY-MM-DD format.No definition available.false020false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse9falsetruefalseFROM_Jan01_2013_TO_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_StructuredProductsMember_us-gaap_RangeAxis_MaximumMemberhttp://www.sec.gov/CIK0000072971duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseStructured products [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldiwfc_StructuredProductsMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberfalsefalseMaximum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MaximumMemberus-gaap_RangeAxisexplicitMembernanafalse021true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse022false5us-gaap_DerivativeMaturityDatesus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse002056-12-31falsefalsetrue2falsefalsefalse002056-12-31falsefalsetruexbrli:dateItemTypedateDate the derivative contract matures, in CCYY-MM-DD format.No definition available.false023false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse11falseUSDtruefalse$AS_OF_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_StructuredProductsMember_us-gaap_PaymentAndPerformanceRiskCreditRatingAxis_ExternalCreditRatingNonInvestmentGradeMemberhttp://www.sec.gov/CIK0000072971instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseStructured products [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldiwfc_StructuredProductsMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberfalsefalseNon-investment Grade [Member]us-gaap_PaymentAndPerformanceRiskCreditRatingAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ExternalCreditRatingNonInvestmentGradeMemberus-gaap_PaymentAndPerformanceRiskCreditRatingAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse024true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse025false5us-gaap_CreditDerivativeMaximumExposureUndiscountedus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse15990000001599USD$falsefalsefalse2truefalsefalse20390000002039USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the maximum potential amount of future payments (undiscounted) the seller could be required to make under the credit derivative or each group of similar credit derivatives before reduction for potential recoveries under recourse or collateralization provisions in the credit derivative.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Credit Derivative
-URI http://asc.fasb.org/extlink&oid=6854095
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false226false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse13falseUSDtruefalse$AS_OF_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_CreditDefaultSwapMemberhttp://www.sec.gov/CIK0000072971instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseCredit Default Swap [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CreditDefaultSwapMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse027true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse028false5us-gaap_CreditDerivativeCurrentFairValueus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse50000005USD$falsefalsefalse2truefalsefalse40000004USD$falsefalsefalsexbrli:monetaryItemTypemonetaryDiscloses the fair value of the credit derivative (or each group of similar credit derivatives) as of the date of the statement of financial position.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false229false5us-gaap_CreditDerivativeMaximumExposureUndiscountedus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse37530000003753USD$falsefalsefalse2truefalsefalse35200000003520USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the maximum potential amount of future payments (undiscounted) the seller could be required to make under the credit derivative or each group of similar credit derivatives before reduction for potential recoveries under recourse or collateralization provisions in the credit derivative.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Credit Derivative
-URI http://asc.fasb.org/extlink&oid=6854095
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false230false5wfc_CreditDerivativesNotionalAmountPurchasedCreditProtectionwfc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse34170000003417USD$falsefalsefalse2truefalsefalse34440000003444USD$falsefalsefalsexbrli:monetaryItemTypemonetaryDescribes, in the context of the estimate of potential recoveries, any purchased credit protection with identical underlying(s).No definition available.false231false5wfc_CreditDerivativeNotionalAmountNetProtectionSoldAndPurchasedwfc_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse336000000336USD$falsefalsefalse2truefalsefalse7600000076USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCredit Derivative, Notional Amount, Net protection sold and purchased.No definition available.false232false5wfc_CreditDerivativeNotionalAmountPurchasedCreditProtectionOtherwfc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse586000000586USD$falsefalsefalse2truefalsefalse616000000616USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCredit derivative, Notional Amount, purchased credit protection other.No definition available.false233false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse15falsetruefalseFROM_Jan01_2013_TO_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_CreditDefaultSwapMember_us-gaap_RangeAxis_MinimumMemberhttp://www.sec.gov/CIK0000072971duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseCredit Default Swap [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CreditDefaultSwapMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberfalsefalseMinimum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MinimumMemberus-gaap_RangeAxisexplicitMembernanafalse034true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse035false5us-gaap_DerivativeMaturityDatesus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse002014-01-01falsefalsetrue2falsefalsefalse002013-01-01falsefalsetruexbrli:dateItemTypedateDate the derivative contract matures, in CCYY-MM-DD format.No definition available.false036false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse17falsetruefalseFROM_Jan01_2013_TO_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_CreditDefaultSwapMember_us-gaap_RangeAxis_MaximumMemberhttp://www.sec.gov/CIK0000072971duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseCredit Default Swap [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CreditDefaultSwapMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberfalsefalseMaximum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MaximumMemberus-gaap_RangeAxisexplicitMembernanafalse037true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse038false5us-gaap_DerivativeMaturityDatesus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse002018-12-31falsefalsetrue2falsefalsefalse002017-12-31falsefalsetruexbrli:dateItemTypedateDate the derivative contract matures, in CCYY-MM-DD format.No definition available.false039false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse19falseUSDtruefalse$AS_OF_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_CreditDefaultSwapMember_us-gaap_PaymentAndPerformanceRiskCreditRatingAxis_ExternalCreditRatingNonInvestmentGradeMemberhttp://www.sec.gov/CIK0000072971instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseCredit Default Swap [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CreditDefaultSwapMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberfalsefalseNon-investment Grade [Member]us-gaap_PaymentAndPerformanceRiskCreditRatingAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ExternalCreditRatingNonInvestmentGradeMemberus-gaap_PaymentAndPerformanceRiskCreditRatingAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse040true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse041false5us-gaap_CreditDerivativeMaximumExposureUndiscountedus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse363000000363USD$falsefalsefalse2truefalsefalse348000000348USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the maximum potential amount of future payments (undiscounted) the seller could be required to make under the credit derivative or each group of similar credit derivatives before reduction for potential recoveries under recourse or collateralization provisions in the credit derivative.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Credit Derivative
-URI http://asc.fasb.org/extlink&oid=6854095
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false242false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse21falseUSDtruefalse$AS_OF_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_CorporateBondSecuritiesMemberhttp://www.sec.gov/CIK0000072971instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseCorporate Bond Securities [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CorporateBondSecuritiesMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse043true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse044false5us-gaap_CreditDerivativeCurrentFairValueus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse104000000104USD$falsefalsefalse2truefalsefalse240000000240USD$falsefalsefalsexbrli:monetaryItemTypemonetaryDiscloses the fair value of the credit derivative (or each group of similar credit derivatives) as of the date of the statement of financial position.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false245false5us-gaap_CreditDerivativeMaximumExposureUndiscountedus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse1272700000012727USD$falsefalsefalse2truefalsefalse1584500000015845USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the maximum potential amount of future payments (undiscounted) the seller could be required to make under the credit derivative or each group of similar credit derivatives before reduction for potential recoveries under recourse or collateralization provisions in the credit derivative.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Credit Derivative
-URI http://asc.fasb.org/extlink&oid=6854095
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false246false5wfc_CreditDerivativesNotionalAmountPurchasedCreditProtectionwfc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse69820000006982USD$falsefalsefalse2truefalsefalse96360000009636USD$falsefalsefalsexbrli:monetaryItemTypemonetaryDescribes, in the context of the estimate of potential recoveries, any purchased credit protection with identical underlying(s).No definition available.false247false5wfc_CreditDerivativeNotionalAmountNetProtectionSoldAndPurchasedwfc_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse57450000005745USD$falsefalsefalse2truefalsefalse62090000006209USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCredit Derivative, Notional Amount, Net protection sold and purchased.No definition available.false248false5wfc_CreditDerivativeNotionalAmountPurchasedCreditProtectionOtherwfc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse73190000007319USD$falsefalsefalse2truefalsefalse77010000007701USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCredit derivative, Notional Amount, purchased credit protection other.No definition available.false249false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse23falsetruefalseFROM_Jan01_2013_TO_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_CorporateBondSecuritiesMember_us-gaap_RangeAxis_MinimumMemberhttp://www.sec.gov/CIK0000072971duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseCorporate Bond Securities [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CorporateBondSecuritiesMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberfalsefalseMinimum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MinimumMemberus-gaap_RangeAxisexplicitMembernanafalse050true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse051false5us-gaap_DerivativeMaturityDatesus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse002013-01-01falsefalsetrue2falsefalsefalse002013-01-01falsefalsetruexbrli:dateItemTypedateDate the derivative contract matures, in CCYY-MM-DD format.No definition available.false052false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse25falsetruefalseFROM_Jan01_2013_TO_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_CorporateBondSecuritiesMember_us-gaap_RangeAxis_MaximumMemberhttp://www.sec.gov/CIK0000072971duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseCorporate Bond Securities [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CorporateBondSecuritiesMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberfalsefalseMaximum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MaximumMemberus-gaap_RangeAxisexplicitMembernanafalse053true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse054false5us-gaap_DerivativeMaturityDatesus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse002021-12-31falsefalsetrue2falsefalsefalse002021-12-31falsefalsetruexbrli:dateItemTypedateDate the derivative contract matures, in CCYY-MM-DD format.No definition available.false055false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse27falseUSDtruefalse$AS_OF_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_CorporateBondSecuritiesMember_us-gaap_PaymentAndPerformanceRiskCreditRatingAxis_ExternalCreditRatingNonInvestmentGradeMemberhttp://www.sec.gov/CIK0000072971instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseCorporate Bond Securities [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CorporateBondSecuritiesMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberfalsefalseNon-investment Grade [Member]us-gaap_PaymentAndPerformanceRiskCreditRatingAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ExternalCreditRatingNonInvestmentGradeMemberus-gaap_PaymentAndPerformanceRiskCreditRatingAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse056true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse057false5us-gaap_CreditDerivativeMaximumExposureUndiscountedus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse65590000006559USD$falsefalsefalse2truefalsefalse84480000008448USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the maximum potential amount of future payments (undiscounted) the seller could be required to make under the credit derivative or each group of similar credit derivatives before reduction for potential recoveries under recourse or collateralization provisions in the credit derivative.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Credit Derivative
-URI http://asc.fasb.org/extlink&oid=6854095
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false258false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse29falseUSDtruefalse$AS_OF_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_AssetBackedSecuritiesMemberhttp://www.sec.gov/CIK0000072971instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseTotal asset-backed securities [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetBackedSecuritiesMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse059true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse060false5us-gaap_CreditDerivativeCurrentFairValueus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse5300000053USD$falsefalsefalse2truefalsefalse5700000057USD$falsefalsefalsexbrli:monetaryItemTypemonetaryDiscloses the fair value of the credit derivative (or each group of similar credit derivatives) as of the date of the statement of financial position.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false261false5us-gaap_CreditDerivativeMaximumExposureUndiscountedus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse6000000060USD$falsefalsefalse2truefalsefalse6400000064USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the maximum potential amount of future payments (undiscounted) the seller could be required to make under the credit derivative or each group of similar credit derivatives before reduction for potential recoveries under recourse or collateralization provisions in the credit derivative.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Credit Derivative
-URI http://asc.fasb.org/extlink&oid=6854095
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false262false5wfc_CreditDerivativesNotionalAmountPurchasedCreditProtectionwfc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse40000004USD$falsefalsefalse2truefalsefalse60000006USD$falsefalsefalsexbrli:monetaryItemTypemonetaryDescribes, in the context of the estimate of potential recoveries, any purchased credit protection with identical underlying(s).No definition available.false263false5wfc_CreditDerivativeNotionalAmountNetProtectionSoldAndPurchasedwfc_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse5600000056USD$falsefalsefalse2truefalsefalse5800000058USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCredit Derivative, Notional Amount, Net protection sold and purchased.No definition available.false264false5wfc_CreditDerivativeNotionalAmountPurchasedCreditProtectionOtherwfc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse9000000090USD$falsefalsefalse2truefalsefalse9200000092USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCredit derivative, Notional Amount, purchased credit protection other.No definition available.false265false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse31falsetruefalseFROM_Jan01_2013_TO_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_AssetBackedSecuritiesMember_us-gaap_RangeAxis_MinimumMemberhttp://www.sec.gov/CIK0000072971duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseTotal asset-backed securities [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetBackedSecuritiesMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberfalsefalseMinimum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MinimumMemberus-gaap_RangeAxisexplicitMembernanafalse066true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse067false5us-gaap_DerivativeMaturityDatesus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse002037-01-01falsefalsetrue2falsefalsefalse002037-01-01falsefalsetruexbrli:dateItemTypedateDate the derivative contract matures, in CCYY-MM-DD format.No definition available.false068false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse33falsetruefalseFROM_Jan01_2013_TO_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_AssetBackedSecuritiesMember_us-gaap_RangeAxis_MaximumMemberhttp://www.sec.gov/CIK0000072971duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseTotal asset-backed securities [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetBackedSecuritiesMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberfalsefalseMaximum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MaximumMemberus-gaap_RangeAxisexplicitMembernanafalse069true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse070false5us-gaap_DerivativeMaturityDatesus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse002046-12-31falsefalsetrue2falsefalsefalse002046-12-31falsefalsetruexbrli:dateItemTypedateDate the derivative contract matures, in CCYY-MM-DD format.No definition available.false071false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse35falseUSDtruefalse$AS_OF_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_AssetBackedSecuritiesMember_us-gaap_PaymentAndPerformanceRiskCreditRatingAxis_ExternalCreditRatingNonInvestmentGradeMemberhttp://www.sec.gov/CIK0000072971instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseTotal asset-backed securities [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetBackedSecuritiesMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberfalsefalseNon-investment Grade [Member]us-gaap_PaymentAndPerformanceRiskCreditRatingAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ExternalCreditRatingNonInvestmentGradeMemberus-gaap_PaymentAndPerformanceRiskCreditRatingAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse072true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse073false5us-gaap_CreditDerivativeMaximumExposureUndiscountedus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse6000000060USD$falsefalsefalse2truefalsefalse6400000064USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the maximum potential amount of future payments (undiscounted) the seller could be required to make under the credit derivative or each group of similar credit derivatives before reduction for potential recoveries under recourse or collateralization provisions in the credit derivative.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Credit Derivative
-URI http://asc.fasb.org/extlink&oid=6854095
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false274false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse37falseUSDtruefalse$AS_OF_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_CommercialMortgageBackedSecuritiesMemberhttp://www.sec.gov/CIK0000072971instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseCommercial [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialMortgageBackedSecuritiesMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse075true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse076false5us-gaap_CreditDerivativeCurrentFairValueus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse438000000438USD$falsefalsefalse2truefalsefalse531000000531USD$falsefalsefalsexbrli:monetaryItemTypemonetaryDiscloses the fair value of the credit derivative (or each group of similar credit derivatives) as of the date of the statement of financial position.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false277false5us-gaap_CreditDerivativeMaximumExposureUndiscountedus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse12030000001203USD$falsefalsefalse2truefalsefalse12490000001249USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the maximum potential amount of future payments (undiscounted) the seller could be required to make under the credit derivative or each group of similar credit derivatives before reduction for potential recoveries under recourse or collateralization provisions in the credit derivative.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Credit Derivative
-URI http://asc.fasb.org/extlink&oid=6854095
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false278false5wfc_CreditDerivativesNotionalAmountPurchasedCreditProtectionwfc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse634000000634USD$falsefalsefalse2truefalsefalse790000000790USD$falsefalsefalsexbrli:monetaryItemTypemonetaryDescribes, in the context of the estimate of potential recoveries, any purchased credit protection with identical underlying(s).No definition available.false279false5wfc_CreditDerivativeNotionalAmountNetProtectionSoldAndPurchasedwfc_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse569000000569USD$falsefalsefalse2truefalsefalse459000000459USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCredit Derivative, Notional Amount, Net protection sold and purchased.No definition available.false280false5wfc_CreditDerivativeNotionalAmountPurchasedCreditProtectionOtherwfc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse545000000545USD$falsefalsefalse2truefalsefalse524000000524USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCredit derivative, Notional Amount, purchased credit protection other.No definition available.false281false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse39falsetruefalseFROM_Jan01_2013_TO_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_CommercialMortgageBackedSecuritiesMember_us-gaap_RangeAxis_MinimumMemberhttp://www.sec.gov/CIK0000072971duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseCommercial [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialMortgageBackedSecuritiesMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberfalsefalseMinimum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MinimumMemberus-gaap_RangeAxisexplicitMembernanafalse082true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse083false5us-gaap_DerivativeMaturityDatesus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse002049-01-01falsefalsetrue2falsefalsefalse002049-01-01falsefalsetruexbrli:dateItemTypedateDate the derivative contract matures, in CCYY-MM-DD format.No definition available.false084false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse41falsetruefalseFROM_Jan01_2013_TO_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_CommercialMortgageBackedSecuritiesMember_us-gaap_RangeAxis_MaximumMemberhttp://www.sec.gov/CIK0000072971duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseCommercial [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialMortgageBackedSecuritiesMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberfalsefalseMaximum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MaximumMemberus-gaap_RangeAxisexplicitMembernanafalse085true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse086false5us-gaap_DerivativeMaturityDatesus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse002052-12-31falsefalsetrue2falsefalsefalse002052-12-31falsefalsetruexbrli:dateItemTypedateDate the derivative contract matures, in CCYY-MM-DD format.No definition available.false087false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse43falseUSDtruefalse$AS_OF_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_CommercialMortgageBackedSecuritiesMember_us-gaap_PaymentAndPerformanceRiskCreditRatingAxis_ExternalCreditRatingNonInvestmentGradeMemberhttp://www.sec.gov/CIK0000072971instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseCommercial [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialMortgageBackedSecuritiesMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberfalsefalseNon-investment Grade [Member]us-gaap_PaymentAndPerformanceRiskCreditRatingAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ExternalCreditRatingNonInvestmentGradeMemberus-gaap_PaymentAndPerformanceRiskCreditRatingAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse088true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse089false5us-gaap_CreditDerivativeMaximumExposureUndiscountedus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse240000000240USD$falsefalsefalse2truefalsefalse861000000861USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the maximum potential amount of future payments (undiscounted) the seller could be required to make under the credit derivative or each group of similar credit derivatives before reduction for potential recoveries under recourse or collateralization provisions in the credit derivative.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Credit Derivative
-URI http://asc.fasb.org/extlink&oid=6854095
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false290false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse45falseUSDtruefalse$AS_OF_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_OtherCreditDerivativesMemberhttp://www.sec.gov/CIK0000072971instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseOther Credit Derivatives [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_OtherCreditDerivativesMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse091true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse092false5us-gaap_CreditDerivativeCurrentFairValueus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse10000001USD$falsefalsefalse2truefalsefalse40000004USD$falsefalsefalsexbrli:monetaryItemTypemonetaryDiscloses the fair value of the credit derivative (or each group of similar credit derivatives) as of the date of the statement of financial position.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false293false5us-gaap_CreditDerivativeMaximumExposureUndiscountedus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse28130000002813USD$falsefalsefalse2truefalsefalse33440000003344USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the maximum potential amount of future payments (undiscounted) the seller could be required to make under the credit derivative or each group of similar credit derivatives before reduction for potential recoveries under recourse or collateralization provisions in the credit derivative.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Credit Derivative
-URI http://asc.fasb.org/extlink&oid=6854095
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false294false5wfc_CreditDerivativesNotionalAmountPurchasedCreditProtectionwfc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse2400000024USD$falsefalsefalse2truefalsefalse106000000106USD$falsefalsefalsexbrli:monetaryItemTypemonetaryDescribes, in the context of the estimate of potential recoveries, any purchased credit protection with identical underlying(s).No definition available.false295false5wfc_CreditDerivativeNotionalAmountNetProtectionSoldAndPurchasedwfc_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse27890000002789USD$falsefalsefalse2truefalsefalse32380000003238USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCredit Derivative, Notional Amount, Net protection sold and purchased.No definition available.false296false5wfc_CreditDerivativeNotionalAmountPurchasedCreditProtectionOtherwfc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse54610000005461USD$falsefalsefalse2truefalsefalse46550000004655USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCredit derivative, Notional Amount, purchased credit protection other.No definition available.false297false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse47falsetruefalseFROM_Jan01_2013_TO_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_OtherCreditDerivativesMember_us-gaap_RangeAxis_MinimumMemberhttp://www.sec.gov/CIK0000072971duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseOther Credit Derivatives [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_OtherCreditDerivativesMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberfalsefalseMinimum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MinimumMemberus-gaap_RangeAxisexplicitMembernanafalse098true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse099false5us-gaap_DerivativeMaturityDatesus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse002013-01-01falsefalsetrue2falsefalsefalse002013-01-01falsefalsetruexbrli:dateItemTypedateDate the derivative contract matures, in CCYY-MM-DD format.No definition available.false0100false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse49falsetruefalseFROM_Jan01_2013_TO_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_OtherCreditDerivativesMember_us-gaap_RangeAxis_MaximumMemberhttp://www.sec.gov/CIK0000072971duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseOther Credit Derivatives [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_OtherCreditDerivativesMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberfalsefalseMaximum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MaximumMemberus-gaap_RangeAxisexplicitMembernanafalse0101true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0102false5us-gaap_DerivativeMaturityDatesus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse002056-12-31falsefalsetrue2falsefalsefalse002056-12-31falsefalsetruexbrli:dateItemTypedateDate the derivative contract matures, in CCYY-MM-DD format.No definition available.false0103false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse51falseUSDtruefalse$AS_OF_Jun30_2013_us-gaap_CreditDerivativesByContractTypeAxis_OtherCreditDerivativesMember_us-gaap_PaymentAndPerformanceRiskCreditRatingAxis_ExternalCreditRatingNonInvestmentGradeMemberhttp://www.sec.gov/CIK0000072971instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseOther Credit Derivatives [Member]us-gaap_CreditDerivativesByContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_OtherCreditDerivativesMemberus-gaap_CreditDerivativesByContractTypeAxisexplicitMemberfalsefalseNon-investment Grade [Member]us-gaap_PaymentAndPerformanceRiskCreditRatingAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ExternalCreditRatingNonInvestmentGradeMemberus-gaap_PaymentAndPerformanceRiskCreditRatingAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0104true4wfc_DetailsOfSoldAndPurchasedCreditDerivativesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0105false5us-gaap_CreditDerivativeMaximumExposureUndiscountedus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse27950000002795USD$falsetruefalse2truefalsefalse33440000003344USD$falsetruefalsexbrli:monetaryItemTypemonetaryRepresents the maximum potential amount of future payments (undiscounted) the seller could be required to make under the credit derivative or each group of similar credit derivatives before reduction for potential recoveries under recourse or collateralization provisions in the credit derivative.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Credit Derivative
-URI http://asc.fasb.org/extlink&oid=6854095
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false2falseDerivatives, Sold and Purchased Credit Derivatives (Details) (USD $)MillionsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://wellsfargo.com/role/DerivativesSoldAndPurchasedCreditDerivativesDetails2105
