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The difference in the price at which the institution buys the securities and resells the securities represents interest for the use of the funds by the other party. Most repurchase and sale agreements involve obligations of the federal government or its agencies, but other financial instruments, such as commercial paper, banker's acceptances and negotiable certificates of deposits are sometimes used in such transactions.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 4 -Article 9 falsefalse8false0us-gaap_InterestAndFeeIncomeLoansAndLeasesus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse329000000329falsefalsefalsefalsefalse2truefalsefalse239000000239falsefalsefalsefalsefalse< Cell>3truefalsefalse269000000269falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real es tate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 1 -Article 9 falsefalse9false0stt_InterestIncomeFromTradingAccountAssetssttfalsecreditdurationTrading account assets.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse2000000020falsefalsefalsefalsefalse3truefalsefalse7800000078falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryTrading account assets.No authoritative reference available.falsefalse10false0stt_InterestRevenueAssociatedWithAmlfstt< IsBaseElement>falsecreditdurationInterest revenue associated with AMLFfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse2500000025falsefalsefalsefalsefalse3truefalsefalse367000000367falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryInterest revenue associated with AMLFNo authoritative reference available.falsefalse11false0stt_InterestEarningAssetsOthersttfalsecreditdurationOther interest-earning assetsfalsefalsefal sefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse30000003falsefalsefalsefalsefalse2truefalsefalse20000002falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryOther interest-earning assetsNo authoritative reference available.falsefalse12false0us-gaap_InterestIncomeOperatingus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse34620000003462falsefalsefalsefalsefalse2truefalsefalse32860000003286falsefalsefalsefalsefalse3truefalsefalse48790000004879falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryInterest generated from day to day operating activities of the business. This element represents a revenue generating activity and is therefore gross (before any related cost of revenue items ).No authoritative reference available.truefalse13false0us-gaap_InterestExpenseDepositsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse213000000213falsefalsefalsefalsefalse2truefalsefalse195000000195falsefalsefalsefalsefalse3truefalsefalse13260000001326falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAggregate amount of interest expense on all deposits.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Paragraph 6 -Subsection II Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 6 -Article 9 falsefalse14false0us-gaap_InterestExpenseShortTermBorrowingsus-gaaptruedebitdurationNo definition 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included in short-term borrowings relating to third party asset backed securitization trusts.No authoritative reference available.falsefalse21false0stt_ReductionInInterestRevenueRelatedToRevisionsOfTaxCashFlowProjectionssttfalsecreditdurationReduction in Interest Revenue Related To Revisions Of Tax Cash Flow Projectionsfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse9800000098falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryReduction in Interest Revenue Related To Revisions Of Tax Cash Flow ProjectionsNo authoritative reference available.falsefalse320Net Interest Revenue (Details) (USD $)MillionsUnKnownUnKnownUnKnownfalsetrue