Fair Value (Tables)

9 Months Ended

Sep. 30, 2012

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

The following tables present information with respect to our financial assets and liabilities carried at fair value in our consolidated statement of condition on a recurring basis as of the dates indicated. No transfers of financial assets or liabilities between levels 1 and 2 occurred during the nine months ended September 30, 2012 or the year ended December 31, 2011.



	Fair Value Measurements on a Recurring Basis
	as of September 30, 2012
(In millions)	Quoted Market Prices in Active Markets (Level 1)		Pricing Methods with Significant Observable Market Inputs (Level 2)		Pricing Methods with Significant Unobservable Market Inputs (Level 3)		Impact of Netting⁽¹⁾			Total Net Carrying Value in Consolidated Statement of Condition
Assets:
Trading account assets:
U.S. government securities	$	20								$	20
Non-U.S. government securities	366									366
Other	72		$	153						225
Investment securities available for sale:
U.S. Treasury and federal agencies:
Direct obligations	3		867							870
Mortgage-backed securities	—		31,097		$	906				32,003
Asset-backed securities:
Student loans	—		16,059		478					16,537
Credit cards	—		9,728		238					9,966
Sub-prime	—		1,379		—					1,379
Other	—		666		3,460					4,126
Total asset-backed securities	—		27,832		4,176					32,008
Non-U.S. debt securities:
Mortgage-backed securities	—		10,759		285					11,044
Asset-backed securities	—		5,243		677					5,920
Government securities	—		2,986		—					2,986
Other	—		3,840		194					4,034
Total non-U.S. debt securities	—		22,828		1,156					23,984
State and political subdivisions	—		7,256		48					7,304
Collateralized mortgage obligations	—		4,721		124					4,845
Other U.S. debt securities	—		5,095		9					5,104
U.S. equity securities	—		881		—					881
Non-U.S. equity securities	—		130		—					130
Total investment securities available for sale	3		100,707		6,419					107,129
Other assets:
Derivative instruments:
Foreign exchange contracts	—		6,646		99
Interest-rate contracts	—		186		—
Total derivative instruments	—		6,832		99		$	(3,496	)	3,435
Other	49		2		—		—			51
Total assets carried at fair value	$	510	$	107,694	$	6,518	$	(3,496	)	$	111,226
Liabilities:
Accrued expenses and other liabilities:
Derivative instruments:
Foreign exchange contracts			$	6,351	$	100
Interest-rate contracts			301		—
Other			—		9
Total derivative instruments			6,652		109		$	(2,947	)	$	3,814
Other	$	49	—		—		—			49
Total liabilities carried at fair value	$	49	$	6,652	$	109	$	(2,947	)	$	3,863

⁽¹⁾

Represents counterparty netting against level 2 financial assets and liabilities, where a legally enforceable master netting agreement exists between State Street and the counterparty. Netting also reflects asset and liability reductions of $854 million and $367 million, respectively, for cash collateral received from and deposited with derivative counterparties. This netting cannot be disaggregated by type of derivative instrument.



	Fair Value Measurements on a Recurring Basis
	as of December 31, 2011
(In millions)	Quoted Market Prices in Active Markets (Level 1)		Pricing Methods with Significant Observable Market Inputs (Level 2)		Pricing Methods with Significant Unobservable Market Inputs (Level 3)		Impact of Netting⁽¹⁾			Total Net Carrying Value in Consolidated Statement of Condition
Assets:
Trading account assets:
U.S. government securities	$	20								$	20
Non-U.S. government securities	498									498
Other	51		$	138						189
Investment securities available for sale:
U.S. Treasury and federal agencies:
Direct obligations	1,727		1,109							2,836
Mortgage-backed securities	—		28,832		$	1,189				30,021
Asset-backed securities:
Student loans	—		15,685		860					16,545
Credit cards	—		10,396		91					10,487
Sub-prime	—		1,404		—					1,404
Other	—		667		2,798					3,465
Total asset-backed securities	—		28,152		3,749					31,901
Non-U.S. debt securities:
Mortgage-backed securities	—		9,418		1,457					10,875
Asset-backed securities	—		2,535		1,768					4,303
Government securities	—		1,671		—					1,671
Other	—		2,754		71					2,825
Total non-U.S. debt securities	—		16,378		3,296					19,674
State and political subdivisions	—		6,997		50					7,047
Collateralized mortgage obligations	—		3,753		227					3,980
Other U.S. debt securities	—		3,613		2					3,615
U.S. equity securities	—		640		—					640
Non-U.S. equity securities	1		117		—					118
Total investment securities available for sale	1,728		89,591		8,513					99,832
Other assets:
Derivatives instruments:
Foreign exchange contracts	—		12,045		168
Interest-rate contracts	—		1,795		10
Other	—		1		—
Total derivative instruments	—		13,841		178		$	(7,653	)	6,366
Other	110		—		—		—			110
Total assets carried at fair value	$	2,407	$	103,570	$	8,691	$	(7,653	)	$	107,015
Liabilities:
Accrued expenses and other liabilities:
Derivative instruments:
Foreign exchange contracts			$	12,191	$	161
Interest-rate contracts			1,970		11
Other			1		9
Total derivative instruments			14,162		181		$	(7,653	)	$	6,690
Other	$	110	—		20		—			130
Total liabilities carried at fair value	$	110	$	14,162	$	201	$	(7,653	)	$	6,820


⁽¹⁾	Represents counterparty netting against level 2 financial assets and liabilities, where a legally enforceable master netting agreement exists between State Street and the counterparty. This netting cannot be disaggregated by type of derivative instrument.

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The following tables present activity related to our level-3 financial assets and liabilities during the three and nine months ended September 30, 2012 and 2011, respectively. Transfers into and out of level 3 are reported as of the beginning of the period. During both the three and nine months ended September 30, 2012 and 2011, transfers out of level 3 were substantially related to certain mortgage- and asset-backed securities and non-U.S. debt securities, for which fair value was measured using prices for which observable market information became available.



	Fair Value Measurements Using Significant Unobservable Inputs
	Three Months Ended September 30, 2012
	Fair Value at June 30, 2012		Transfers into Level 3		Transfers out of Level 3			Total Realized and Unrealized Gains (Losses)						Purchases		Issuances	Sales			Settlements			Fair Value at September 30, 2012		Change in Unrealized Gains (Losses) Related to Financial Instruments Held at September 30, 2012
(In millions)								Recorded in Revenue			Recorded in Other Comprehensive Income
Assets:
Investment securities available for sale:
U.S. Treasury and federal agencies, mortgage-backed securities	$	933									$	3								$	(30	)	$	906
Asset-backed securities:
Student loans	484							$	1		5									(12		)	478
Credit cards	274				$	(36	)	1			(1		)							—			238
Other	3,094		$	12	(11		)	10			14			$	608					(267		)	3,460
Total asset-backed securities	3,852		12		(47		)	12			18			608						(279		)	4,176
Non-U.S. debt securities:
Mortgage-backed securities	273		—		(147		)	—			—			156						3			285
Asset-backed securities	1,362		—		(676		)	1			4			—						(14		)	677
Other	1		—		—			—			—			193						—			194
Total non-U.S. debt securities	1,636		—		(823		)	1			4			349						(11		)	1,156
State and political subdivisions	49		—		—			—			(1		)	—						—			48
Collateralized mortgage obligations	301		—		(123		)	168			1			—			$	(45	)	(178		)	124
Other U.S. debt securities	—		9		—			—			—			—			—			—			9
Total investment securities available for sale	6,771		21		(993		)	181			25			957			(45		)	(498		)	6,419
Other assets:
Derivative instruments, foreign exchange contracts	160		—		—			(69		)	—			75			—			(67		)	99		$	(47	)
Total assets carried at fair value	$	6,931	$	21	$	(993	)	$	112		$	25		$	1,032	—	$	(45	)	$	(565	)	$	6,518	$	(47	)



	Fair Value Measurements Using Significant Unobservable Inputs
	Nine Months Ended September 30, 2011
	Fair Value at December 31, 2010		Transfers into Level 3		Transfers out of Level 3			Total Realized and Unrealized Gains (Losses)						Purchases		Issuances	Sales			Settlements			Fair Value at September 30, 2011		Change in Unrealized Gains (Losses) Related to Financial Instruments Held at September 30, 2011
(In millions)								Recorded in Revenue			Recorded in Other Comprehensive Income
Assets:
Investment securities available for sale:
U.S. Treasury and federal agencies:
Direct obligations					$	(17	)							$	39								$	22
Mortgage-backed securities	$	673			(404		)				$	3		1,289						$	(62	)	1,499
Asset-backed securities:
Student loans	1,234				(720		)	$	2		(6		)	421						18			949
Credit cards	43				(35		)	3			(2		)	301						1			311
Other	2,000		$	114	(135		)	22			14			837			$	(37	)	(82		)	2,733
Total asset-backed securities	3,277		114		(890		)	27			6			1,559			(37		)	(63		)	3,993
Non-U.S. debt securities:
Mortgage-backed securities	396		—		(739		)	—			—			1,261			—			12			930
Asset-backed securities	740		—		(693		)	1			8			1,538			(3		)	(185		)	1,406
Government securities	1		—		—			—			—			—			—			(1		)	—
Other	8		—		—			—			—			—			—			(2		)	6
Total non-U.S. debt securities	1,145		—		(1,432		)	1			8			2,799			(3		)	(176		)	2,342
State and political subdivisions	50		1		(3		)	—			—			3						—			51
Collateralized mortgage obligations	359		—		(359		)	363			(2		)	381						(392		)	350
Other U.S. debt securities	3		—		—			—			—			—						(1		)	2
Total investment securities available for sale	5,507		115		(3,105		)	391			15			6,070			(40		)	(694		)	8,259
Other assets:
Derivative instruments:
Foreign exchange contracts	254		—		—			(15		)	—			256			—			(184		)	311		$	40
Interest-rate contracts	—		—		—			5			—			10			(4		)	—			11		9
Total derivative instruments	254		—		—			(10		)	—			266			(4		)	(184		)	322		49
Total assets carried at fair value	$	5,761	$	115	$	(3,105	)	$	381		$	15		$	6,336	—	$	(44	)	$	(878	)	$	8,581	$	49



	Fair Value Measurements Using Significant Unobservable Inputs
	Three Months Ended September 30, 2011
	Fair Value at June 30, 2011		Transfers into Level 3	Transfers out of Level 3			Total Realized and Unrealized Gains (Losses)						Purchases		Issuances	Sales			Settlements			Fair Value at September 30, 2011		Change in Unrealized Gains (Losses) Related to Financial Instruments Held at September 30, 2011
(In millions)							Recorded in Revenue			Recorded in Other Comprehensive Income
Assets:
Investment securities available for sale:
U.S. Treasury and federal agencies:
Direct obligations	$	17		$	(17	)							$	22								$	22
Mortgage-backed securities	932									$	2		590						$	(25	)	1,499
Asset-backed securities:
Student loans	1,289			$	(379	)	$	(1	)	(6		)	—						46			949
Credit cards	79			(20		)	2			—			250						—			311
Other	2,530			—			5			(34		)	267			$	(37	)	2			2,733
Total asset-backed securities	3,898			(399		)	6			(40		)	517			(37		)	48			3,993
Non-U.S. debt securities:
Mortgage-backed securities	361			(36		)	—			(1		)	608			—			(2		)	930
Asset-backed securities	1,749			(573		)	—			(3		)	286			(3		)	(50		)	1,406
Other	6			—			—			—			—			—			—			6
Total non-U.S. debt securities	2,116			(609		)	—			(4		)	894			(3		)	(52		)	2,342
State and political subdivisions	54			(2		)	—			(1		)	—			—			—			51
Collateralized mortgage obligations	173			(31		)	31			(1		)	216			—			(38		)	350
Other U.S. debt securities	2			—			—			—			—			—			—			2
Total investment securities available for sale	7,192			(1,058		)	37			(44		)	2,239			(40		)	(67		)	8,259
Other assets:
Derivative instruments:
Foreign exchange contracts	201			—			54			—			173						(117		)	311		$	59
Interest-rate contracts	8			—			—			—			4			(1		)	—			11		2
Total derivative instruments	209			—			54			—			177			(1		)	(117		)	322		61
Total assets carried at fair value	$	7,401	—	$	(1,058	)	$	91		$	(44	)	$	2,416	—	$	(41	)	$	(184	)	$	8,581	$	61



	Fair Value Measurements Using Significant Unobservable Inputs
	Nine Months Ended September 30, 2012
	Fair Value at December 31, 2011		Transfers into Level 3		Transfers out of Level 3			Total Realized and Unrealized Gains (Losses)						Purchases		Issuances	Sales			Settlements			Fair Value at September 30, 2012		Change in Unrealized Gains (Losses) Related to Financial Instruments Held at September 30, 2012
(in millions)								Recorded in Revenue			Recorded in Other Comprehensive Income
Assets:
Investment securities available for sale:
U.S. Treasury and federal agencies, mortgage-backed securities	$	1,189	$	50	$	(251	)				$	3								$	(85	)	$	906
Asset-backed securities:
Student loans	860		—		(341		)	$	2		(5		)							(38		)	478
Credit cards	91		21		(36		)	4			(5		)	$	224		$	(61	)	—			238
Other	2,798		12		(11		)	31			39			1,177			(12		)	(574		)	3,460
Total asset-backed securities	3,749		33		(388		)	37			29			1,401			(73		)	(612		)	4,176
Non-U.S. debt securities:
Mortgage-backed securities	1,457		—		(1,642		)	—			3			463			—			4			285
Asset-backed securities	1,768		—		(2,243		)	1			4			1,206			—			(59		)	677
Other	71		—		(372		)	—			(3		)	500			—			(2		)	194
Total Non-U.S. debt securities	3,296		—		(4,257		)	1			4			2,169			—			(57		)	1,156
State and political subdivisions	50		—		—			—			—			—			—			(2		)	48
Collateralized mortgage obligations	227		44		(314		)	369			1			283			(45		)	(441		)	124
Other U.S. debt securities	2		9		—			—			—			—			—			(2		)	9
Total investment securities available for sale	8,513		136		(5,210		)	407			37			3,853			(118		)	(1,199		)	6,419
Other assets:
Derivative instruments:
Foreign exchange contracts	168		—		—			(127		)	—			162			—			(104		)	99		$	(71	)
Interest-rate contracts	10		—		—			(10		)	—			—			—			—			—		—
Total derivative instruments	178		—		—			(137		)	—			162			—			(104		)	99		(71		)
Total assets carried at fair value	$	8,691	$	136	$	(5,210	)	$	270		$	37		$	4,015	—	$	(118	)	$	(1,303	)	$	6,518	$	(71	)



	Fair Value Measurements Using Significant Unobservable Inputs
	Nine Months Ended September 30, 2012
	Fair Value at December 31, 2011		Transfers into Level 3	Transfers out of Level 3	Total Realized and Unrealized (Gains) Losses				Purchases	Issuances		Sales	Settlements			Fair Value at September 30, 2012		Change in Unrealized (Gains) Losses Related to Financial Instruments Held at September 30, 2012
(In millions)					Recorded in Revenue			Recorded in Other Comprehensive Income
Liabilities:
Accrued expenses and other liabilities:
Derivative instruments:
Foreign exchange contracts	$	161			$	(131	)			$	162		$	(92	)	$	100	$	(70	)
Interest-rate contracts	11				(11		)			—			—			—		—
Other	9				—					—			—			9		—
Total derivative instruments	181				(142		)			162			(92		)	109		(70		)
Other	20				—					—			(20		)	—		—
Total liabilities carried at fair value	$	201	—	—	$	(142	)	—	—	$	162	—	$	(112	)	$	109	$	(70	)



	Fair Value Measurements Using Significant Unobservable Inputs
	Three Months Ended September 30, 2011
	Fair Value at June 30, 2011		Transfers into Level 3	Transfers out of Level 3			Total Realized and Unrealized Gains (Losses)						Purchases		Issuances	Sales			Settlements			Fair Value at September 30, 2011		Change in Unrealized Gains (Losses) Related to Financial Instruments Held at September 30, 2011
(In millions)							Recorded in Revenue			Recorded in Other Comprehensive Income
Assets:
Investment securities available for sale:
U.S. Treasury and federal agencies:
Direct obligations	$	17		$	(17	)							$	22								$	22
Mortgage-backed securities	932									$	2		590						$	(25	)	1,499
Asset-backed securities:
Student loans	1,289			$	(379	)	$	(1	)	(6		)	—						46			949
Credit cards	79			(20		)	2			—			250						—			311
Other	2,530			—			5			(34		)	267			$	(37	)	2			2,733
Total asset-backed securities	3,898			(399		)	6			(40		)	517			(37		)	48			3,993
Non-U.S. debt securities:
Mortgage-backed securities	361			(36		)	—			(1		)	608			—			(2		)	930
Asset-backed securities	1,749			(573		)	—			(3		)	286			(3		)	(50		)	1,406
Other	6			—			—			—			—			—			—			6
Total non-U.S. debt securities	2,116			(609		)	—			(4		)	894			(3		)	(52		)	2,342
State and political subdivisions	54			(2		)	—			(1		)	—			—			—			51
Collateralized mortgage obligations	173			(31		)	31			(1		)	216			—			(38		)	350
Other U.S. debt securities	2			—			—			—			—			—			—			2
Total investment securities available for sale	7,192			(1,058		)	37			(44		)	2,239			(40		)	(67		)	8,259
Other assets:
Derivative instruments:
Foreign exchange contracts	201			—			54			—			173						(117		)	311		$	59
Interest-rate contracts	8			—			—			—			4			(1		)	—			11		2
Total derivative instruments	209			—			54			—			177			(1		)	(117		)	322		61
Total assets carried at fair value	$	7,401	—	$	(1,058	)	$	91		$	(44	)	$	2,416	—	$	(41	)	$	(184	)	$	8,581	$	61

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]



	Fair Value Measurements Using Significant Unobservable Inputs
	Nine Months Ended September 30, 2012
	Fair Value at December 31, 2011		Transfers into Level 3	Transfers out of Level 3	Total Realized and Unrealized (Gains) Losses				Purchases	Issuances		Sales	Settlements			Fair Value at September 30, 2012		Change in Unrealized (Gains) Losses Related to Financial Instruments Held at September 30, 2012
(In millions)					Recorded in Revenue			Recorded in Other Comprehensive Income
Liabilities:
Accrued expenses and other liabilities:
Derivative instruments:
Foreign exchange contracts	$	161			$	(131	)			$	162		$	(92	)	$	100	$	(70	)
Interest-rate contracts	11				(11		)			—			—			—		—
Other	9				—					—			—			9		—
Total derivative instruments	181				(142		)			162			(92		)	109		(70		)
Other	20				—					—			(20		)	—		—
Total liabilities carried at fair value	$	201	—	—	$	(142	)	—	—	$	162	—	$	(112	)	$	109	$	(70	)



	Fair Value Measurements Using Significant Unobservable Inputs
	Three Months Ended September 30, 2011
	Fair Value at June 30, 2011		Transfers into Level 3	Transfers out of Level 3	Total Realized and Unrealized (Gains) Losses			Purchases			Issuances		Sales			Settlements			Fair Value at September 30, 2011		Change in Unrealized (Gains) Losses Related to Financial Instruments Held at September 30, 2011
(In millions)	Fair Value at June 30, 2011		Transfers into Level 3	Transfers out of Level 3	Recorded in Revenue		Recorded in Other Comprehensive Income	Purchases			Issuances		Sales			Settlements			Fair Value at September 30, 2011
Liabilities:
Accrued expenses and other liabilities:
Derivative instruments:
Foreign exchange contracts	$	203			$	42					$	170				$	(117	)	$	298	$	51
Interest-rate contracts	16				—			$	(1	)	15		$	(16	)	—			14		10
Other	9				—			—			—		—			—			9		—
Total derivative instruments	228				42			(1		)	185		(16		)	(117		)	321		61
Other	11																		11
Total liabilities carried at fair value	$	239	—	—	$	42	—	$	(1	)	$	185	$	(16	)	$	(117	)	$	332	$	61



	Fair Value Measurements Using Significant Unobservable Inputs
	Three Months Ended September 30, 2012
	Fair Value at June 30, 2012		Transfers into Level 3	Transfers out of Level 3	Total Realized and Unrealized (Gains) Losses				Purchases	Issuances		Sales	Settlements			Fair Value at September 30, 2012		Change in Unrealized (Gains) Losses Related to Financial Instruments Held at September 30, 2012
(In millions)	Fair Value at June 30, 2012		Transfers into Level 3	Transfers out of Level 3	Recorded in Revenue			Recorded in Other Comprehensive Income	Purchases	Issuances		Sales	Settlements			Fair Value at September 30, 2012
Liabilities:
Accrued expenses and other liabilities:
Derivative instruments:
Foreign exchange contracts	$	157			$	(58	)			$	76		$	(75	)	$	100	$	(43	)
Other	9				—					—			—			9		—
Total derivative instruments	166				(58		)			76			(75		)	109		(43		)
Total liabilities carried at fair value	$	166	—	—	$	(58	)	—	—	$	76	—	$	(75	)	$	109	$	(43	)



	Fair Value Measurements Using Significant Unobservable Inputs
	Nine Months Ended September 30, 2011
	Fair Value at December 31, 2010		Transfers into Level 3	Transfers out of Level 3	Total Realized and Unrealized (Gains) Losses				Purchases			Issuances		Sales			Settlements			Fair Value at September 30, 2011		Change in Unrealized (Gains) Losses Related to Financial Instruments Held at September 30, 2011
(In millions)	Fair Value at December 31, 2010		Transfers into Level 3	Transfers out of Level 3	Recorded in Revenue			Recorded in Other Comprehensive Income	Purchases			Issuances		Sales			Settlements			Fair Value at September 30, 2011
Liabilities:
Accrued expenses and other liabilities:
Derivative instruments:
Foreign exchange contracts	$	260			$	(21	)					$	247				$	(188	)	$	298	$	32
Interest-rate contracts	—				10				$	(5	)	29		$	(20	)	—			14		10
Other	9				—				—			—		—			—			9		—
Total derivative instruments	269				(11		)		(5		)	276		(20		)	(188		)	321		42
Other	—				—				—			11		—			—			11
Total liabilities carried at fair value	$	269	—	—	$	(11	)	—	$	(5	)	$	287	$	(20	)	$	(188	)	$	332	$	42

Level 3 Total Realized And Unrealized Gains And Losses Recorded In Revenue

The following table presents total realized and unrealized gains and losses for the periods indicated that were recorded in revenue for our level-3 financial assets and liabilities:



	Three Months Ended September 30,								Nine Months Ended September 30,
(In millions)	Total Realized and Unrealized Gains (Losses) Recorded in Revenue					Change in Unrealized Gains (Losses) Related to Financial Instruments Held at September 30,			Total Realized and Unrealized Gains (Losses) Recorded in Revenue				Change in Unrealized Gains (Losses) Related to Financial Instruments Held at September 30,
	2012			2011		2012		2011	2012		2011		2012			2011
Fee revenue:
Trading services	$	(11	)	$	12	(4	)		$	5	$	1	$	(1	)	$	7
Total fee revenue	(11		)	12		(4	)		5		1		(1		)	7
Net interest revenue	181			37					407		391		—			—
Total revenue	$	170		$	49	(4	)	—	$	412	$	392	$	(1	)	$	7

Fair Value Inputs, Assets and Liabilities, Quantitative Information [Table Text Block]

The following table presents quantitative information about the valuation techniques and significant unobservable inputs used in the valuation of our level-3 financial assets and liabilities measured at fair value on a recurring basis for which we use internally developed pricing models. The significant unobservable inputs for our level-3 financial assets and liabilities whose fair value is measured using pricing information from non-binding broker or dealer quotes are not included in the table, as the specific inputs applied are not provided by the broker/dealer.



	Quantitative Information about Level-3 Fair Value Measurements
(Dollars in millions)	Fair Value at September 30, 2012		Valuation Technique	Significant Unobservable Input	Weighted-Average
Significant unobservable inputs readily available to State Street:
Assets:
Asset-backed securities, student loans	$	12	Discounted cash flows	Credit spread	6.7%
Asset-backed securities, credit cards	138		Discounted cash flows	Credit spread	3.0%
Asset-backed securities, other	101		Discounted cash flows	Credit spread	2.0%
State and political subdivisions	48		Discounted cash flows	Credit spread	1.9%
Derivative instruments, foreign exchange contracts	99		Option model	Volatility	9.3%
Total	$	398

Liabilities:
Derivative instruments, foreign exchange contracts	$	100	Option model	Volatility	9.3%
Derivative instruments, other	9		Discounted cash flows	Participant redemptions	5.9%
Total	$	109

Schedule of Availability of Significant Unobservable Inputs by Balance Sheet Classification [Table Text Block]

The following table presents information with respect to the composition of our level-3 financial assets and liabilities by availability of significant unobservable inputs as of September 30, 2012:



	Fair Value at September 30, 2012
(In millions)	Significant Unobservable Inputs Readily Available to State Street ⁽¹⁾		Significant Unobservable Inputs Not Developed by State Street and Not Readily Available ⁽²⁾		Total Assets and Liabilities with Significant Unobservable Inputs
Assets:
Mortgage-backed securities			$	906	$	906
Asset-backed securities, student loans	$	12	466		478
Asset-backed securities, credit cards	138		100		238
Asset-backed securities, other	101		3,359		3,460
Non-U.S. debt securities, mortgage-backed securities	—		285		285
Non-U.S. debt securities, asset-backed securities	—		677		677
Non-U.S. debt securities, other	—		194		194
State and political subdivisions	48		—		48
Collateralized mortgage obligations	—		124		124
Other U.S.debt securities	—		9		9
Derivative instruments, foreign exchange contracts	99		—		99
Total	$	398	$	6,120	$	6,518

Liabilities:
Derivative instruments, foreign exchange contracts	$	100			$	100
Derivative instruments, other	9				9
Total	$	109	—		$	109

Carrying Value and Estimated Fair Value of Financial Instruments by Fair Value Hierarchy [Table Text Block]

The following table presents the reported amounts and estimated fair values of the financial instruments defined by GAAP, excluding financial assets and liabilities carried at fair value on a recurring basis, as they would be categorized within the fair-value hierarchy as of September 30, 2012.



					Fair Value Hierarchy
(In millions)	Reported Amount		Fair Value		Quoted Market Prices in Active Markets (Level 1)		Pricing Methods with Significant Observable Market Inputs (Level 2)		Pricing Methods with Significant Unobservable Market Inputs (Level 3)
Financial Assets:
Cash and due from banks	$	6,432	$	6,432	$	6,432
Interest-bearing deposits with banks	31,583		31,583				$	31,583
Securities purchased under resale agreements	8,264		8,264		—		8,264
Investment securities held to maturity	8,360		8,622		—		8,622
Loans (excluding leases)	12,845		12,858		—		11,878		$	980
Financial Liabilities:
Deposits:
Noninterest-bearing	40,963		40,963		—		40,963		—
Interest-bearing-U.S.	11,107		11,107		—		11,107		—
Interest-bearing-non-U.S.	94,219		94,219		—		94,219		—
Securities sold under repurchase agreements	7,933		7,933		—		7,933		—
Federal funds purchased	169		169		—		169		—
Other short-term borrowings	5,181		5,181		—		5,181		—
Long-term debt	6,418		6,700		—		5,808		892

Schedule of Reported Amounts and Estimated Fair Values for Financial Instruments [Table Text Block]

The following table presents the reported amounts and estimated fair values of the financial instruments defined by GAAP, excluding the aforementioned short-duration financial instruments and financial assets and liabilities carried at fair value on a recurring basis, as of December 31, 2011:



(In millions)	Reported Amount		Fair Value
Financial Assets:
Investment securities held to maturity	$	9,321	$	9,362
Net loans (excluding leases)	8,777		8,752

Financial Liabilities:
Long-term debt	8,131		8,206

- Definition

Tabular disclosure of the total amount of gains or losses for the period which are included in earnings or resulted in a change to net assets which gains or losses have arisen from the use of significant unobservable inputs (Level 3) to measure the fair value of assets and liabilities. Such gains or losses are attributable to the change in unrealized gains or losses relating to those assets and liabilities so valued which are still held at the reporting date and which change are also considered for disclosure; it may be expected that a description of where those unrealized gains or losses are reported in the statement of income or the statement of financial position would also be disclosed.

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- Definition

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

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- Definition

Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.

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