2.2.0.25falsefalse42001 - Disclosure - Occupancy Expense and Information Systems and Communications Expense (Narrative) (Details)truefalseIn Millions, unless otherwise specifiedfalse1falsefalseUSDfalsefalse1/1/2010 - 12/31/2010
USD ($)
USD ($) / shares
$Duration_1_1_2010_To_12_31_2010http://www.sec.gov/CIK0000093751duration2010-01-01T00:00:002010-12-31T00:00:00Unit15Standardhttp://xbrl.us/us-types/2009-01-31sqftxbrlus0Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit14Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2falsefalseUSDfalsefalse1/1/2009 - 12/31/2009
USD ($)
USD ($) / shares
$Duration_1_1_2009_To_12_31_2009http://www.sec.gov/CIK0000093751duration2009-01-01T00:00:002009-12-31T00:00:00Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit14Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$3falsefalseUSDfalsefalse1/1/2008 - 12/31/2008
USD ($)
USD ($) / shares
$Duration_1_1_2008_To_12_31_2008http://www.sec.gov/CIK0000093751duration2008-01-01T00:00:002008-12-31T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit14Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$5false0us-gaap_Depreciationus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse373000000373falsetruefalsefalsefalse2truefalsefalse380000000380falsetruefalsefalsefalse3truefalsefalse353000000353falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 5
falsefalse6false0stt_LeasedAreasttfalsenadurationLeased Areafalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse872000872000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherus-types:areaItemTypedecimalLeased AreaNo authoritative reference available.falsefalse7false0stt_UndergroundParkingGaragesttfalsenadurationUnderground Parking Garagefalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse366000366000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherus-types:areaItemTypedecimalUnderground Parking GarageNo authoritative reference available.falsefalse8false0stt_NoncancelableCapitalLeasesExpirationsttfalsenadurationNoncancelable Capital Leases Expirationfalsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse2020falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:integerItemTypeintegerNoncancelable Capital Leases E
xpirationNo authoritative reference available.falsefalse9false0stt_NonCancelableLeaseMaturityDatesttfalsenadurationNon-cancelable lease maturity datefalsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse002023-09-012023-09-01falsefalsetruefalsefalse2falsefalsefalse00falsefalsetruefalsefalse3falsefalsefalse00falsefalsetruefalsefalseOtherxbrli:dateItemTypedateNon-cancelable lease maturity dateNo authoritative reference available.falsefalse10false0stt_LeasedAreaOfOfficeBuildingSquareFeetsttfalsenadurationLeased Area of Office Building, Square Feetfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse362000362000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:integerItemTypeintegerLeased Area of Office Building, Square FeetNo authoritative reference available.falsefalse11false0stt_CapitalLeasePeriodsttfalsenadurationCapital Lease Periodfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse2020falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefal
seOtherxbrli:integerItemTypeintegerCapital Lease PeriodNo authoritative reference available.falsefalse12false0stt_CapitalLeaseMaturityDatesttfalsenadurationCapital lease maturity datefalsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse002028-12-012028-12-01falsefalsetruefalsefalse2falsefalsefalse00falsefalsetruefalsefalse3falsefalsefalse00falsefalsetruefalsefalseOtherxbrli:dateItemTypedateCapital lease maturity dateNo authoritative refer
ence available.falsefalse13false0stt_PeriodForCancellationOfCapitalLeasesttfalsenadurationPeriod For Cancellation Of Capital Leasefalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1515falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:integerItemTypeintegerPeriod For Cancellation Of Capital LeaseNo authoritative reference available.falsefalse14false0us-gaap_CapitalLeaseObligations<
/ElementName>us-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse606000000606falsefalsefalsefalsefalse2truefalsefalse660000000660falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 16
-Article 7
falsefalse15false0us-gaap_InterestExpenseLesseeAssetsUnderCapitalLeaseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse4400000044falsefalsefalsefalsefalse2truefalsefalse4700000047falsefalsefalsefalsefalse
3truefalsefalse3600000036falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount, during the lease term, of each minimum [capital] lease payment allocated to interest expense so as to produce a constant periodic rate of interest on the remaining balance of the capital lease obligation.Reference 1: http://www.xbrl.org/2003/role/presenta
tionRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 12
falsefalse16false0us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesAccumulatedAmortizationus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse230000000230falsefalsefalsefalsefalse2truefalsefalse185000000185falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAccumulated amortization of deferred income and initial direct costs pertaining to direct financing leases, which resulted from producing constant periodic rates of return on the net investments in the leases over their respective lease terms.Reference 1: http://www.xbrl.org/
2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 18
-Subparagraph b
falsefalse17false0stt_RentalExpenseNetOfSubleaseRevenuesttfalsedebitinstantRental Expense Net Of Sublease Revenuefalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse241000000241falsefalsefalsefalsefalse2truefalsefalse230000000230falsefalsefalsefalsefalse3truefalsefalse241000000241falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRental Expense Net Of Sublease RevenueNo authoritative reference available.falsefalse18false0<
ElementName>us-gaap_OperatingLeasesIncomeStatementSubleaseRevenueus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1200000012falsefalsefalsefalsefalse2truefalsefalse1700000017falsefalsefalsefalsefalse3truefalsefalse1100000011falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of revenue recognized for the period under subleasing arrangements.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Technical Bulletin (FTB)
-Number 88-1
-Paragraph 9
falsefalse19false0stt_CapitalLeasesFutureMinimumSubleaseRentalsDecreasesttfalsedebitinstantCapital Leases Future Minimum Sublease Rentals Decreasefalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1tr
uefalsefalse5800000058falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3
falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryCapital Leases Future Minimum Sublease Rentals DecreaseNo authoritative reference available.falsefalse20false0stt_OperatingLeasesFutureMinimumPaymentsDueCurrentDecreasesttfalsedebitinstantOperating Leases Future Minimum Payments Due Current Decreasefalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse2100000021falsetruefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryOperating Leases Future Minimum Payments Due Current DecreaseNo authoritative reference available.falsefalse316Occupancy Expense and Information Systems and Communications Expense (Narrative) (Details) (USD $)MillionsUnKnownUnKnownUnKnowntruetrue
