2.2.0.25truefalse41403 - Disclosure - Fair Value (Level 3 Total Realized and Unrealized Gains and Losses Recorded in Revenue) (Details)truefalseIn Millionsfalse1falsefalseUSDfalsefalse12/31/2009
USD ($)
USD ($) / shares
$As_Of_12_31_2009http://www.sec.gov/CIK0000093751instant2009-12-31T00:00:000001-01-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit14Divide
http://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$2falsefalseUSDtruefalse{us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis} : Trading Services [Member]
1/1/2010 - 12/31/2010
USD ($)
$Duration_1_1_2010_To_12_31_20104http://www.sec.gov/CIK0000093751duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseTrading Services [Member]us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxisxbrldihttp://xbrl.org/2006/xbrldistt_TradingServicesMemberus-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3falsefalseUSDtruefalse{us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis} : Trading Services [Member]
1/1/2009 - 12/31/2009
USD ($)
$Duration_1_1_2009_To_12_31_2009722http://www.sec.gov/CIK0000093751duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseTrading Services [Member]us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxisxbrldihttp://xbrl.org/2006/xbrldistt_TradingServicesMemberus-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4falsefalseUSDtruefalse{us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis} : Processing Fees and Other [Member]
1/1/2009 - 12/31/2009
USD ($)
$Duration_1_1_2009_To_12_31_20096http://www.sec.gov/CIK0000093751duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseProcessing Fees and Other [Member]us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxisxbrldihttp://xbrl.org/2006/xbrldistt_ProcessingFeesAndOtherMemberus-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxisexplicitMemberUnit12Standard<
StandardMeasure>http://www.xbrl.org/2003/iso4217USDiso42170USDUSD$5falsefalseUSDtruefalse{us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis} : Total Fee Revenue [Member]
1/1/2010 - 12/31/2010
USD ($)
$Duration_1_1_2010_To_12_31_2010322http://www.sec.gov/CIK0000093751duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseTotal Fee Revenue [Member]us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxisxbrldihttp://xbrl.org/2006/xbrldistt_TotalFeeRevenueMemberus-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$6falsefalseUSDtruefalse{us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis} : Total Fee Revenue [Member]
1/1/2009 - 12/31/2009
USD ($)
$Duration_1_1_2009_To_12_31_20097http://www.sec.gov/CIK0000093751duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseTotal Fee Revenue [Member]us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxisxbrldihttp://xbrl.org/2006/xbrldistt_TotalFeeRevenueMemberus-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$7falsefalseUSDtruefalse{us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis} : Net Interest Revenue [Member]
1/1/2010 - 12/31/2010
USD ($)
$Duration_1_1_2010_To_12_31_201052http://www.sec.gov/CIK0000093751duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseNet Interest Revenue [Member]us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_InterestIncomeMemberus-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$8falsefalseUSDtruefalse{us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis} : Net Interest Revenue [Member]
1/1/2009 - 12/31/2009
USD ($)
$Duration_1_1_2009_To_12_31_20098http://www.sec.gov/CIK0000093751duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseNet Interest Revenue [Member]us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_InterestIncomeMemberus-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$9falsefalseUSDtruefalse{us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis} : Total Revenue [Member]
1/1/2010 - 12/31/2010
USD ($)
$Duration_1_1_2010_To_12_31_2010323http://www.sec.gov/CIK0000093751duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseTotal Revenue [Member]us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxisxbrldihttp://xbrl.org/2006/xbrldistt_TotalRevenueMemberus-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$10falsefalseUSDtruefalse{us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxis} : Total Revenue [Member]
1/1/2009 - 12/31/2009
USD ($)
$Duration_1_1_2009_To_12_31_200972http://www.sec.gov/CIK0000093751duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseTotal Revenue [Member]us-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxisxbrldihttp://xbrl.org/2006/xbrldistt_TotalRevenueMemberus-gaap_FairValueAssetsMeasuredOnRecurringBasisDisclosureItemsAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false0stt_TotalRealizedAndUnrealizedGainsLossesRecordedInRevenuesttfalsecreditdurationTotal Realized And Unrealized Gains Losses Recorded In Revenuefalsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse1700000017falsetruefalsetruefalse3truefalsefalse3800000038[1]falsetruefalsetruefalse4truefalsefalse5000000050[1]falsetruefalsetruefalse5truefalsefalse1700000017falsetruefalsetruefalse6truefalsefalse8800000088[1]falsetruefalsetruefalse7truefalsefalse141000000141falsetruefalsetruefalse8truefalsefalse-101000000-101[1]falsetruefalsetruefalse9truefalsefalse158000000158falsetruefalsetruefalse10truefalsefalse-13000000-13[1]falsetruefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryTotal Realized And Unrealized Gains Losses Recorded In RevenueNo authoritative reference available.falsefalse3false0stt_ChangeInUnrealizedGainsLossesRelatedToFinancialInstrumentssttfalsecreditdurationChange In Unrealized Gains Losses Related To Financial Instrumentsfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse-5000000-5falsefalsefalsetruefalse3truefalsefalse-5000000-5falsefalsefalsetruefalse4truefalsefalse5000000050falsefalsefalsetruefalse5truefalsefalse-5000000-5falsefalsefalsetruefalse6truefalsefalse4500000045falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9truefalsefalse-5000000-5falsefalsefalsetruefalse10truefalsefalse4500000045falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryChange In Unrealized Gains Losses Related To Financial InstrumentsNo authoritative reference available.falsefalse4false0stt_UnrealizedLossesOnWrittenOptionssttfalsecreditinstantUnrealized losses on written optionsfalsefalsefalsefalsefalsefalsefalsefalsefalse<
/IsEndingBalance>falselabel1truefalsefalse90000009falsetruefalsefalsefalse2falsefalsefalse00falsefalse<
DisplayDateInUSFormat>falsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalse
truefalseMonetaryxbrli:monetaryItemTypemonetaryUnrealized losses on written optionsNo authoritative reference available.falsefalse1
Excludes unrealized losses on written options related to book-value protection provided to stable value funds, which are recorded in other expenses in our consolidated statement of income, and totaled $9 million for the year ended December 31, 2009. 103Fair Value (Level 3 Total Realized and Unrealized Gains and Losses Recorded in Revenue) (Details) (USD $)MillionsUnKnownUnKnownUnKnownfalsetrue
