XML 116 R93.htm IDEA: XBRL DOCUMENT v2.4.1.9
Long-Term Debt - Narrative (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
Bank Notes Authorized $ 5,000,000,000stt_BankNotesAuthorized  
Senior Debt Securities Authorized Under Board Authority 4,100,000,000stt_SeniorDebtSecuritiesAuthorizedUnderBoardAuthority  
Subordinated Debt Available for Issuance 500,000,000stt_SubordinatedDebtAvailableforIssuance  
Capital Lease Obligations 624,000,000us-gaap_CapitalLeaseObligations 646,000,000us-gaap_CapitalLeaseObligations
2.875% notes due 2016    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 2.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= stt_TwoPointEightSevenFivePercentNotesDue2016Member		  
4.375% notes due 2021    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 4.375%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= stt_FourPointThreeSevenFiveNotesDue2021Member		  
3.70% notes due in 2023(1)    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 3.70%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= stt_ThreePointSevenZeroPercentSeniorNotesDue2023Member		  
1.35% notes due 2018(1)    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 1.35%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= stt_OnePointThreeFivePercentSeniorNotesDue2018Member		  
3.10% subordinated notes due 2023(1)    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 3.10%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= stt_ThreePointOneSubordinatedNotesDue2023Member		  
4.956% junior subordinated debentures due 2018    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 4.956%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= stt_FourPointNineFiveSixPercentJuniorSubordinatedDebenturesDue2018Member		  
Subordinated Borrowing, Interest Rate 4.956%us-gaap_SubordinatedBorrowingInterestRate
/ us-gaap_DebtInstrumentAxis
= stt_FourPointNineFiveSixPercentJuniorSubordinatedDebenturesDue2018Member		  
4.30% notes due 2014    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 4.30%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= stt_FourPointThreeZeroPercentNotesDue2014Member		  
5.375% notes due 2017    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 5.375%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= stt_FivePointThreeSevenFivePercentNotesDue2017Member		  
Subordinated Borrowing, Interest Rate 5.375%us-gaap_SubordinatedBorrowingInterestRate
/ us-gaap_DebtInstrumentAxis
= stt_FivePointThreeSevenFivePercentNotesDue2017Member		  
7.35% notes due 2026    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 7.35%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= stt_SevenPointThreeFivePercentNotesDue2026Member		  
Subordinated Borrowing, Interest Rate 7.35%us-gaap_SubordinatedBorrowingInterestRate
/ us-gaap_DebtInstrumentAxis
= stt_SevenPointThreeFivePercentNotesDue2026Member		  
Floating-rate extendible notes due 2016    
Debt Instrument [Line Items]    
Subordinated Borrowing, Due Date Jan. 13, 2014  
Maximum Maturity Date for Extension Option Jan. 15, 2016  
Date at Which Optional Redemptions of Debt are Allowable Jan. 15, 2015  
Debt Instrument, Redemption Price, Percentage 100.00%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_DebtInstrumentAxis
= stt_ExtendibleNotesDue2014Member		  
5.25% subordinated notes due 2018    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 5.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= stt_FivePointTwoFivePercentSubordinatedNotesDue2018Member		  
Subordinated Borrowing, Interest Rate 5.25%us-gaap_SubordinatedBorrowingInterestRate
/ us-gaap_DebtInstrumentAxis
= stt_FivePointTwoFivePercentSubordinatedNotesDue2018Member		  
5.30% subordinated notes due 2016    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 5.30%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= stt_FivePointThreeZeroPercentSubordinatedNotesDue2016Member		  
Subordinated Borrowing, Interest Rate 5.30%us-gaap_SubordinatedBorrowingInterestRate
/ us-gaap_DebtInstrumentAxis
= stt_FivePointThreeZeroPercentSubordinatedNotesDue2016Member		  
3.30% notes due 2024(1)    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 1,000,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= stt_ThreePointThreeZeroPercentNotesDue2024Member		  
3.70% notes due in 2023(1)    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 3.70%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= stt_ThreePointSevenZeroPercentSeniorNotesDue2023Member		  
Senior notes | 1.35% notes due 2018(1)    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 1.35%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= stt_OnePointThreeFivePercentSeniorNotesDue2018Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		  
Subordinated note | 3.30% notes due 2024(1)    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 3.30%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= stt_ThreePointThreeZeroPercentNotesDue2024Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SubordinatedDebtMember		  
Subordinated note | 3.10% subordinated notes due 2023(1)    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 3.10%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= stt_ThreePointOneSubordinatedNotesDue2023Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SubordinatedDebtMember		  
State Street Capital Trusts I And I V    
Debt Instrument [Line Items]    
Number Of Statutory Business Trusts 2stt_NumberOfStatutoryBusinessTrusts
/ us-gaap_ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis
= stt_StateStreetCapitalTrustsIAndIVMember		  
Proceeds from Issuance of Trust Preferred Securities 955,000,000us-gaap_ProceedsFromIssuanceOfTrustPreferredSecurities
/ us-gaap_ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis
= stt_StateStreetCapitalTrustsIAndIVMember		  
Building and Parking Garage    
Debt Instrument [Line Items]    
Capital Lease Obligations 336,000,000us-gaap_CapitalLeaseObligations
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= stt_BuildingAndParkingGarageMember		 363,000,000us-gaap_CapitalLeaseObligations
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= stt_BuildingAndParkingGarageMember
Office Building    
Debt Instrument [Line Items]    
Capital Lease Obligations 241,000,000us-gaap_CapitalLeaseObligations
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_OfficeBuildingMember		 267,000,000us-gaap_CapitalLeaseObligations
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_OfficeBuildingMember
Construction in Progress    
Debt Instrument [Line Items]    
Capital Lease Obligations $ 191,000,000us-gaap_CapitalLeaseObligations
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember		 $ 158,000,000us-gaap_CapitalLeaseObligations
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember