2.4.0.8410020 - Disclosure - Guarantees, Offsetting of Resale and Repurchase Agreements and Securities Borrowing and Lending (Details)truefalseIn Millions, unless otherwise specifiedfalse1falseUSDfalsefalse$AS_OF_Jun30_2013http://www.sec.gov/CIK0000072971instant2013-06-30T00:00:000001-01-01T00:00:00USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2falseUSDfalsefalse$AS_OF_Dec31_2012http://www.sec.gov/CIK0000072971instant2012-12-31T00:00:000001-01-01T00:00:00USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true3wfc_ResaleSecuritiesBorrowingAndSimilarArrangementsAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse02false4wfc_SecuritiesPurchasedUnderAgreementsToResellAndSecuritiesBorrowedGrosswfc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse4585000000045850USD$falsetruefalse2truefalsefalse4584700000045847USD$falsetruefalsexbrli:monetaryItemTypemonetaryAmount, before effects of master repurchase agreements and master securities lending agreements, of funds outstanding loaned in the form of a security resale agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price, and of securities borrowed from entities in exchange for collateral.No definition available.false23false4wfc_SecuritiesPurchasedUnderAgreementsToResellAndSecuritiesBorrowedAmountOffsetAgainstCollateralwfc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-5315000000-5315falsefalsefalse2truefalsefalse-2561000000-2561falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of funds outstanding loaned in the form of a security resale agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price offset against an obligation to return collateral. Also includes amount of securities borrowed from entities in exchange for collateral offset against an obligation to return collateral under a master netting arrangement.No definition available.false24false4wfc_SecuritiesPurchasedUnderAgreementsToResellAndSecuritiesBorrowedNetAmountInConsolidatedBalanceSheetwfc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse4053500000040535falsefalsefalse2truefalsefalse4328600000043286falsefalsefalsexbrli:monetaryItemTypemonetaryAmount, after effects of master repurchase agreements and master securities lending agreements, of funds outstanding loaned in the form of a security resale agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price, and of securities borrowed from entities in exchange for collateral.No definition available.false25false4wfc_SecuritiesPurchasedUnderAgreementsToResellAndSecuritiesBorrowedCollateralwfc_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-40014000000-40014falsefalsefalse2truefalsefalse-42920000000-42920falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of collateral received related to exposures subject to enforceable master repurchase agreements and master securities lending agreements. While these agreements are typically over-collateralized, the collateral amount is limited to the amount of the related recognized asset for each counterparty.No definition available.false26false4wfc_SecuritiesPurchasedUnderAgreementsToResellAndSecuritiesBorrowedNetwfc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse521000000521falsefalsefalse2truefalsefalse366000000366falsefalsefalsexbrli:monetaryItemTypemonetaryNet amount of exposure after accounting for amounts offset in the consolidated balance sheet and securities or loans collateral that has not been offset against securities purchased under agreement to resell and securities borrowed.No definition available.false27true3wfc_RepurchaseSecuritiesLendingAndSimilarArrangementsAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse08false4wfc_SecuritiesSoldUnderAgreementsToRepurchaseAndSecuritiesLoanedGrosswfc_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse4295800000042958falsefalsefalse2truefalsefalse3587600000035876falsefalsefalsexbrli:monetaryItemTypemonetaryAmount, before effects of master repurchase agreements and master securities lending agreements, of funds outstanding borrowed in the form of a security resale agreement between the entity and another party for the purchase and resale of identical or substantially the same securities at a date certain for a specified price, and of securities loaned to entities in exchange for collateral.No definition available.false29false4wfc_SecuritiesSoldUnderAgreementsToRepurchaseAndSecuritiesLoanedAmountOffsetAgainstCollateralwfc_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-5315000000-5315falsefalsefalse2truefalsefalse-2561000000-2561falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of funds outstanding borrowed in the form of a security resale agreement between the entity and another party for the purchase and resale of identical or substantially the same securities at a date certain for a specified price offset against a right to receive collateral. Also includes amount of securities loaned to entities in exchange for collateral offset against a right to receive collateral under a master netting arrangement.No definition available.false210false4wfc_SecuritiesSoldUnderAgreementsToRepurchaseAndSecuritiesLoanedNetAmountInConsolidatedBalanceSheetwfc_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse3764300000037643falsefalsefalse2truefalsefalse3331500000033315falsefalsefalsexbrli:monetaryItemTypemonetaryAmount, after effects of master repurchase agreements and master securities lending agreements, of funds outstanding borrowed in the form of a security resale agreement between the entity and another party for the purchase and resale of identical or substantially the same securities at a date certain for a specified price, and of securities loaned to entities in exchange for collateral.No definition available.false211false4wfc_SecuritiesSoldUnderAgreementsToRepurchaseAndSecuritiesLoanedCollateralwfc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-37321000000-37321falsefalsefalse2truefalsefalse-33050000000-33050falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of collateral pledged related to exposures subject to enforceable master repurchase agreements and master securities lending agreements. While these agreements are typically over-collateralized, the collateral amount is limited to the amount of the related recognized liability for each counterparty.No definition available.false212false4wfc_SecuritiesSoldUnderAgreementsToRepurchaseAndSecuritiesLoanedNetwfc_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse322000000322USD$falsetruefalse2truefalsefalse265000000265USD$falsetruefalsexbrli:monetaryItemTypemonetaryNet amount of exposure after accounting for amounts offset in the consolidated balance sheet and securities or loans collateral that has not been offset against securities sold under agreement to repurchase and securities loaned.No definition available.false2falseGuarantees, Offsetting of Resale and Repurchase Agreements and Securities Borrowing and Lending (Details) (USD $)MillionsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://wellsfargo.com/role/DisclosureGuaranteesOffsettingOfResaleAndRepurchaseAgreementsAndSecuritiesBorrowingAndLendingDetails212
