Loans and Allowance for Credit Losses, Allowance for Credit Losses (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	$ 17,193	$ 19,129	$ 17,477	$ 19,668
Provision for credit losses	652	1,800	1,871	3,795
Interest income on certain impaired loans	(73)	(82)	(146)	(169)
Loan charge-offs	(1,669)	(2,689)	(3,530)	(5,569)
Loan recoveries	517	489	959	974
Net loan charge-offs	(1,152)	(2,200)	(2,571)	(4,595)
Allowances related to business combinations/other	(2)	(1)	(13)	(53)
Allowance for credit losses, ending balance	16,618	18,646	16,618	18,646
Components: Allowance for loan losses	16,144	18,320	16,144	18,320	17,060
Components: Allowance for unfunded credit commitments	474	326	474	326
Components: Allowance for credit losses	16,618	18,646	16,618	18,646
Net loan charge-offs (annualized) as a percentage of average total loans	0.58%	1.15%	0.65%	1.20%
Allowance for loan losses as a percentage of total loans	2.01%	2.36%	2.01%	2.36%
Allowance for credit losses as a percentage of total loans	2.07%	2.41%	2.07%	2.41%
Total Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	5,786	6,130	5,714	6,358
Provision for credit losses	172	410	364	598
Interest income on certain impaired loans	(16)	(23)	(35)	(54)
Loan charge-offs	(272)	(556)	(532)	(1,114)
Loan recoveries	228	198	398	371
Net loan charge-offs	(44)	(358)	(134)	(743)
Allowances related to business combinations/other	(2)	0	(13)	0
Allowance for credit losses, ending balance	5,896	6,159	5,896	6,159
Components: Allowance for credit losses	5,896	6,159	5,896	6,159
Commercial and Industrial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(184)	(360)	(365)	(719)
Loan recoveries	107	111	195	214
Commercial Real Estate Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(49)	(114)	(109)	(196)
Loan recoveries	54	33	85	69
Commercial Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(7)	(60)	(12)	(140)
Loan recoveries	52	43	91	56
Lease Financing [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(24)	(5)	(27)	(13)
Loan recoveries	6	5	10	11
Foreign Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(8)	(17)	(19)	(46)
Loan recoveries	9	6	17	21
Total Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	11,407	12,999	11,763	13,310
Provision for credit losses	480	1,390	1,507	3,197
Interest income on certain impaired loans	(57)	(59)	(111)	(115)
Loan charge-offs	(1,397)	(2,133)	(2,998)	(4,455)
Loan recoveries	289	291	561	603
Net loan charge-offs	(1,108)	(1,842)	(2,437)	(3,852)
Allowances related to business combinations/other	0	(1)	0	(53)
Allowance for credit losses, ending balance	10,722	12,487	10,722	12,487
Components: Allowance for credit losses	10,722	12,487	10,722	12,487
Real estate 1-4 family first mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(392)	(772)	(867)	(1,600)
Loan recoveries	64	29	110	66
Real estate 1-4 family junior lien mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(428)	(757)	(942)	(1,577)
Loan recoveries	69	68	134	125
Credit Card [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(266)	(286)	(532)	(587)
Loan recoveries	32	46	63	105
Automobile [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(126)	(131)	(290)	(310)
Loan recoveries	84	103	172	208
Other revolving credit and installment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(185)	(187)	(367)	(381)
Loan recoveries	$ 40	$ 45	$ 82	$ 99

Reflects the amount of loans and leases that have been removed, or charged off, from both loan receivables and the reserve for credit losses, typically because they are considered to be not salvageable or have been purchased by unconsolidated collection entities.

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(1)

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- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.7(d))

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Subparagraph d

-Article 9

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 114

-Paragraph 20

-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.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 8, 9

-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.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (b)(1)(ii)

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-Publisher OTS

-Name Federal Regulation (FR)

-Number Title 12

-Section 563c.102

-Paragraph 8

-Subparagraph a(ii)

-Chapter V

-Subsection I

-LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 6

-Section L

-Subsection 1

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- Definition

The sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.11)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 11

-Article 9

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524

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-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Paragraph 168, 169, 170

-IssueDate 2006-05-01

-Chapter 5

-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.

+ Details

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Balance Type:	debit
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- Definition

Total of recoveries of amounts due the Entity that had previously been written off as uncollectible using allowances (the valuation accounts that are netted against the cost of an asset to value it at its carrying value) and total of reestablishments of reserves (liabilities established to represent expected future costs) that had previously been utilized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690

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- Definition

Allowance for credit losses as a percentage of total loans.

+ References

No definition available.

+ Details

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- Definition

Allowance for loan losses as a percentage of total loans.

+ References

No definition available.

+ Details

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- Definition

The allowance for unfunded commitments represent the reserve to cover probable credit losses related to unfunded credit commitments.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Certain impaired loans have a valuation allowance determined by discounting expected cash flows as the respective loan's effective interest rate. Accordingly, the valuation for these impaired loans reduces with the passage of time and that reduction is recognized as interest income.

+ References

No definition available.

+ Details

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Namespace Prefix:	wfc_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

+ References

No definition available.

+ Details

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Namespace Prefix:	wfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Other increase (decrease) to the allowance for credit losses, including allowances related to business combinations and other.

+ References

No definition available.

+ Details

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Namespace Prefix:	wfc_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Net loan charge offs annualized as a percentage of average total loans.

+ References

No definition available.

+ Details

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