Fair Value Measurements - Assets and Liabilities Recorded at Fair Value on Recurring Basis (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	$ 41,167		$ 46,142
Gross Balance, Liabilities	365		341
Level 1 [Member] | Equity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 1 [Member] | Debt Securities issued by foreign entities [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 1 [Member] | Debt Securities issued by foreign entities [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	40		42
Level 1 [Member] | Deposits in domestic offices
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	0	[1]	0	[1]
Level 1 [Member] | Trading Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	308		207
Level 1 [Member] | Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	57	[2]	134	[2]
Level 1 [Member] | Derivatives [Member] | Interest rate contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	34	[2]	90	[2]
Level 1 [Member] | Derivatives [Member] | Foreign exchange contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	16	[2]	25	[2]
Level 1 [Member] | Derivatives [Member] | Equity contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	0	[2]	0	[2]
Level 1 [Member] | Derivatives [Member] | Precious metals contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	7	[2]	19	[2]
Level 1 [Member] | Derivatives [Member] | Credit contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	0	[2]	0	[2]
Level 1 [Member] | Derivatives [Member] | Derivatives netting [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	0	[2]	0	[2]
Level 1 [Member] | Long-term Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	0	[3]	0	[3]
Level 1 [Member] | Trading securities, excluding derivatives [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 1 [Member] | Trading securities, excluding derivatives [Member] | Equity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 1 [Member] | Trading securities, excluding derivatives [Member] | Precious metals [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 1 [Member] | Trading securities, excluding derivatives [Member] | U.S. Treasury, U.S. Government agencies and sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	1,344		2,484
Level 1 [Member] | Trading securities, excluding derivatives [Member] | Obligations of U.S. States and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0
Level 1 [Member] | Trading securities, excluding derivatives [Member] | Collateralized debt obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 1 [Member] | Trading securities, excluding derivatives [Member] | Residential mortgages [Member] | Residential Mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 1 [Member] | Trading securities, excluding derivatives [Member] | Student Loans [Member] | Residential Mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0
Level 1 [Member] | Trading securities, excluding derivatives [Member] | Debt Securities issued by foreign entities [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 1 [Member] | Trading securities, excluding derivatives [Member] | Debt Securities issued by foreign entities [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 1 [Member] | Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	270	[2]	237	[2]
Level 1 [Member] | Derivatives [Member] | Interest rate contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	81	[2]	98	[2]
Level 1 [Member] | Derivatives [Member] | Foreign exchange contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	7	[2]	4	[2]
Level 1 [Member] | Derivatives [Member] | Equity contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0	[2]	0	[2]
Level 1 [Member] | Derivatives [Member] | Precious metals contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	182	[2]	135	[2]
Level 1 [Member] | Derivatives [Member] | Credit contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0	[2]	0	[2]
Level 1 [Member] | Derivatives [Member] | Derivatives netting [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0	[2]	0	[2]
Level 1 [Member] | Securities available-for-sale [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 1 [Member] | Securities available-for-sale [Member] | U.S. Treasury, U.S. Government agencies and sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	39,513		43,379
Level 1 [Member] | Securities available-for-sale [Member] | Obligations of U.S. States and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 1 [Member] | Securities available-for-sale [Member] | Residential mortgages [Member] | Residential Mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 1 [Member] | Securities available-for-sale [Member] | Residential mortgages [Member] | Commercial mortgages [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 1 [Member] | Securities available-for-sale [Member] | Residential mortgages [Member] | Home Equity Line of Credit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 1 [Member] | Securities available-for-sale [Member] | Residential mortgages [Member] | Others [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 1 [Member] | Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0	[4]	0	[4]
Level 1 [Member] | Mortgage servicing rights [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0	[5]	0	[5]
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	113,260		133,451
Gross Balance, Liabilities	93,424		107,412
Level 2 [Member] | Equity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	162		173
Level 2 [Member] | Debt Securities issued by foreign entities [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	881		831
Level 2 [Member] | Debt Securities issued by foreign entities [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	3,681		4,480
Level 2 [Member] | Deposits in domestic offices
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	5,406	[1]	6,056	[1]
Level 2 [Member] | Trading Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	3,826		5,767
Level 2 [Member] | Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	77,506	[2]	88,738	[2]
Level 2 [Member] | Derivatives [Member] | Interest rate contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	56,282	[2]	66,258	[2]
Level 2 [Member] | Derivatives [Member] | Foreign exchange contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	14,576	[2]	13,770	[2]
Level 2 [Member] | Derivatives [Member] | Equity contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	1,403	[2]	1,244	[2]
Level 2 [Member] | Derivatives [Member] | Precious metals contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	847	[2]	712	[2]
Level 2 [Member] | Derivatives [Member] | Credit contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	4,398	[2]	6,754	[2]
Level 2 [Member] | Derivatives [Member] | Derivatives netting [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	0	[2]	0	[2]
Level 2 [Member] | Long-term Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	6,686	[3]	6,851	[3]
Level 2 [Member] | Trading securities, excluding derivatives [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		1,035
Level 2 [Member] | Trading securities, excluding derivatives [Member] | Equity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	25		27
Level 2 [Member] | Trading securities, excluding derivatives [Member] | Precious metals [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	11,751		12,332
Level 2 [Member] | Trading securities, excluding derivatives [Member] | U.S. Treasury, U.S. Government agencies and sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	178		369
Level 2 [Member] | Trading securities, excluding derivatives [Member] | Obligations of U.S. States and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	25
Level 2 [Member] | Trading securities, excluding derivatives [Member] | Collateralized debt obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 2 [Member] | Trading securities, excluding derivatives [Member] | Residential mortgages [Member] | Residential Mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	159		221
Level 2 [Member] | Trading securities, excluding derivatives [Member] | Student Loans [Member] | Residential Mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	68
Level 2 [Member] | Trading securities, excluding derivatives [Member] | Debt Securities issued by foreign entities [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	495		468
Level 2 [Member] | Trading securities, excluding derivatives [Member] | Debt Securities issued by foreign entities [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	6,223		5,609
Level 2 [Member] | Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	78,980	[2]	88,630	[2]
Level 2 [Member] | Derivatives [Member] | Interest rate contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	56,095	[2]	66,602	[2]
Level 2 [Member] | Derivatives [Member] | Foreign exchange contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	15,291	[2]	13,825	[2]
Level 2 [Member] | Derivatives [Member] | Equity contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	2,042	[2]	1,593	[2]
Level 2 [Member] | Derivatives [Member] | Precious metals contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	1,400	[2]	649	[2]
Level 2 [Member] | Derivatives [Member] | Credit contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	4,152	[2]	5,961	[2]
Level 2 [Member] | Derivatives [Member] | Derivatives netting [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0	[2]	0	[2]
Level 2 [Member] | Securities available-for-sale [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		26
Level 2 [Member] | Securities available-for-sale [Member] | U.S. Treasury, U.S. Government agencies and sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	9,439		17,316
Level 2 [Member] | Securities available-for-sale [Member] | Obligations of U.S. States and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	742		912
Level 2 [Member] | Securities available-for-sale [Member] | Residential mortgages [Member] | Residential Mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	1		1
Level 2 [Member] | Securities available-for-sale [Member] | Residential mortgages [Member] | Commercial mortgages [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	126		214
Level 2 [Member] | Securities available-for-sale [Member] | Residential mortgages [Member] | Home Equity Line of Credit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	227		258
Level 2 [Member] | Securities available-for-sale [Member] | Residential mortgages [Member] | Others [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	94		84
Level 2 [Member] | Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	3	[4]	465	[4]
Level 2 [Member] | Mortgage servicing rights [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0	[5]	0	[5]
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	3,667		4,479
Gross Balance, Liabilities	3,751		3,854
Level 3 [Member] | Equity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 3 [Member] | Debt Securities issued by foreign entities [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 3 [Member] | Debt Securities issued by foreign entities [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 3 [Member] | Deposits in domestic offices
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	2,334	[1]	2,636	[1]
Level 3 [Member] | Trading Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	0		0
Level 3 [Member] | Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	517	[2]	789	[2]
Level 3 [Member] | Derivatives [Member] | Interest rate contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	0	[2]	1	[2]
Level 3 [Member] | Derivatives [Member] | Foreign exchange contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	36	[2]	11	[2]
Level 3 [Member] | Derivatives [Member] | Equity contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	157	[2]	173	[2]
Level 3 [Member] | Derivatives [Member] | Precious metals contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	3	[2]	7	[2]
Level 3 [Member] | Derivatives [Member] | Credit contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	321	[2]	597	[2]
Level 3 [Member] | Derivatives [Member] | Derivatives netting [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	0	[2]	0	[2]
Level 3 [Member] | Long-term Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	900	[3]	429	[3]
Level 3 [Member] | Trading securities, excluding derivatives [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	2,260		1,861
Level 3 [Member] | Trading securities, excluding derivatives [Member] | Equity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		9
Level 3 [Member] | Trading securities, excluding derivatives [Member] | Precious metals [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 3 [Member] | Trading securities, excluding derivatives [Member] | U.S. Treasury, U.S. Government agencies and sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 3 [Member] | Trading securities, excluding derivatives [Member] | Obligations of U.S. States and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0
Level 3 [Member] | Trading securities, excluding derivatives [Member] | Collateralized debt obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	254		466
Level 3 [Member] | Trading securities, excluding derivatives [Member] | Residential mortgages [Member] | Residential Mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 3 [Member] | Trading securities, excluding derivatives [Member] | Student Loans [Member] | Residential Mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0
Level 3 [Member] | Trading securities, excluding derivatives [Member] | Debt Securities issued by foreign entities [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		299
Level 3 [Member] | Trading securities, excluding derivatives [Member] | Debt Securities issued by foreign entities [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	121		311
Level 3 [Member] | Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	805	[2]	1,365	[2]
Level 3 [Member] | Derivatives [Member] | Interest rate contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	1	[2]	8	[2]
Level 3 [Member] | Derivatives [Member] | Foreign exchange contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	131	[2]	16	[2]
Level 3 [Member] | Derivatives [Member] | Equity contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	160	[2]	166	[2]
Level 3 [Member] | Derivatives [Member] | Precious metals contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	1	[2]	7	[2]
Level 3 [Member] | Derivatives [Member] | Credit contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	512	[2]	1,168	[2]
Level 3 [Member] | Derivatives [Member] | Derivatives netting [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0	[2]	0	[2]
Level 3 [Member] | Securities available-for-sale [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 3 [Member] | Securities available-for-sale [Member] | U.S. Treasury, U.S. Government agencies and sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 3 [Member] | Securities available-for-sale [Member] | Obligations of U.S. States and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 3 [Member] | Securities available-for-sale [Member] | Residential mortgages [Member] | Residential Mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 3 [Member] | Securities available-for-sale [Member] | Residential mortgages [Member] | Commercial mortgages [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 3 [Member] | Securities available-for-sale [Member] | Residential mortgages [Member] | Home Equity Line of Credit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 3 [Member] | Securities available-for-sale [Member] | Residential mortgages [Member] | Others [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		0
Level 3 [Member] | Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0	[4]	0	[4]
Level 3 [Member] | Mortgage servicing rights [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	227	[5]	168	[5]
Estimate of fair value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	158,094		184,072
Netting, Assets	(72,486)	[6]	(83,367)	[6]
Net Balance, Assets	85,608		100,705
Gross Balance, Liabilities	97,540		111,607
Netting, Liabilities	(70,732)	[6]	(79,580)	[6]
Net Balance, Liabilities	26,808		32,027
Estimate of fair value [Member] | Equity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	162		173
Net Balance, Assets	162		173
Estimate of fair value [Member] | Debt Securities issued by foreign entities [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	881		831
Net Balance, Assets	881		831
Estimate of fair value [Member] | Debt Securities issued by foreign entities [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	3,721		4,522
Net Balance, Assets	3,721		4,522
Estimate of fair value [Member] | Deposits in domestic offices
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	7,740	[1]	8,692	[1]
Net Balance, Liabilities	7,740	[1]	8,692	[1]
Estimate of fair value [Member] | Trading Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	4,134		5,974
Net Balance, Liabilities	4,134		5,974
Estimate of fair value [Member] | Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	78,080	[2]	89,661	[2]
Netting, Liabilities	(70,732)	[2],[6]	(79,580)	[2],[6]
Net Balance, Liabilities	7,348	[2]	10,081	[2]
Estimate of fair value [Member] | Derivatives [Member] | Interest rate contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	56,316	[2]	66,349	[2]
Netting, Liabilities	0	[2],[6]	0	[2],[6]
Net Balance, Liabilities	56,316	[2]	66,349	[2]
Estimate of fair value [Member] | Derivatives [Member] | Foreign exchange contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	14,628	[2]	13,806	[2]
Netting, Liabilities	0	[2],[6]	0	[2],[6]
Net Balance, Liabilities	14,628	[2]	13,806	[2]
Estimate of fair value [Member] | Derivatives [Member] | Equity contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	1,560	[2]	1,417	[2]
Netting, Liabilities	0	[2],[6]	0	[2],[6]
Net Balance, Liabilities	1,560	[2]	1,417	[2]
Estimate of fair value [Member] | Derivatives [Member] | Precious metals contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	857	[2]	738	[2]
Netting, Liabilities	0	[2],[6]	0	[2],[6]
Net Balance, Liabilities	857	[2]	738	[2]
Estimate of fair value [Member] | Derivatives [Member] | Credit contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	4,719	[2]	7,351	[2]
Netting, Liabilities	0	[2],[6]	0	[2],[6]
Net Balance, Liabilities	4,719	[2]	7,351	[2]
Estimate of fair value [Member] | Derivatives [Member] | Derivatives netting [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	0	[2]	0	[2]
Netting, Liabilities	(70,732)	[2],[6]	(79,580)	[2],[6]
Net Balance, Liabilities	(70,732)	[2]	(79,580)	[2]
Estimate of fair value [Member] | Long-term Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Liabilities	7,586	[3]	7,280	[3]
Netting, Liabilities	0	[3],[6]
Net Balance, Liabilities	7,586	[3]	7,280	[3]
Estimate of fair value [Member] | Trading securities, excluding derivatives [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	2,260		2,896
Net Balance, Assets	2,260		2,896
Estimate of fair value [Member] | Trading securities, excluding derivatives [Member] | Equity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	25		36
Net Balance, Assets	25		36
Estimate of fair value [Member] | Trading securities, excluding derivatives [Member] | Precious metals [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	11,751		12,332
Net Balance, Assets	11,751		12,332
Estimate of fair value [Member] | Trading securities, excluding derivatives [Member] | U.S. Treasury, U.S. Government agencies and sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	1,522		2,853
Net Balance, Assets	1,522		2,853
Estimate of fair value [Member] | Trading securities, excluding derivatives [Member] | Obligations of U.S. States and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	25
Net Balance, Assets	25
Estimate of fair value [Member] | Trading securities, excluding derivatives [Member] | Collateralized debt obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	254		466
Net Balance, Assets	254		466
Estimate of fair value [Member] | Trading securities, excluding derivatives [Member] | Residential mortgages [Member] | Residential Mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	159		221
Net Balance, Assets	159		221
Estimate of fair value [Member] | Trading securities, excluding derivatives [Member] | Student Loans [Member] | Residential Mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	68
Net Balance, Assets	68
Estimate of fair value [Member] | Trading securities, excluding derivatives [Member] | Debt Securities issued by foreign entities [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	495		767
Net Balance, Assets	495		767
Estimate of fair value [Member] | Trading securities, excluding derivatives [Member] | Debt Securities issued by foreign entities [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	6,344		5,920
Net Balance, Assets	6,344		5,920
Estimate of fair value [Member] | Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	80,055	[2]	90,232	[2]
Netting, Assets	(72,486)	[2],[6]	(83,367)	[2],[6]
Net Balance, Assets	7,569	[2]	6,865	[2]
Estimate of fair value [Member] | Derivatives [Member] | Interest rate contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	56,177	[2]	66,708	[2]
Netting, Assets	0	[2],[6]	0	[2],[6]
Net Balance, Assets	56,177	[2]	66,708	[2]
Estimate of fair value [Member] | Derivatives [Member] | Foreign exchange contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	15,429	[2]	13,845	[2]
Netting, Assets	0	[2],[6]	0	[2],[6]
Net Balance, Assets	15,429	[2]	13,845	[2]
Estimate of fair value [Member] | Derivatives [Member] | Equity contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	2,202	[2]	1,759	[2]
Netting, Assets	0	[2],[6]	0	[2],[6]
Net Balance, Assets	2,202	[2]	1,759	[2]
Estimate of fair value [Member] | Derivatives [Member] | Precious metals contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	1,583	[2]	791	[2]
Netting, Assets	0	[2],[6]	0	[2],[6]
Net Balance, Assets	1,583	[2]	791	[2]
Estimate of fair value [Member] | Derivatives [Member] | Credit contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	4,664	[2]	7,129	[2]
Netting, Assets	0	[2],[6]	0	[2],[6]
Net Balance, Assets	4,664	[2]	7,129	[2]
Estimate of fair value [Member] | Derivatives [Member] | Derivatives netting [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0	[2]	0	[2]
Netting, Assets	(72,486)	[2],[6]	(83,367)	[2],[6]
Net Balance, Assets	(72,486)	[2]	(83,367)	[2]
Estimate of fair value [Member] | Securities available-for-sale [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	0		26
Net Balance, Assets	0		26
Estimate of fair value [Member] | Securities available-for-sale [Member] | U.S. Treasury, U.S. Government agencies and sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	48,952		60,695
Net Balance, Assets	48,952		60,695
Estimate of fair value [Member] | Securities available-for-sale [Member] | Obligations of U.S. States and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	742		912
Net Balance, Assets	742		912
Estimate of fair value [Member] | Securities available-for-sale [Member] | Residential mortgages [Member] | Residential Mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	1		1
Net Balance, Assets	1		1
Estimate of fair value [Member] | Securities available-for-sale [Member] | Residential mortgages [Member] | Commercial mortgages [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	126		214
Net Balance, Assets	126		214
Estimate of fair value [Member] | Securities available-for-sale [Member] | Residential mortgages [Member] | Home Equity Line of Credit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	227		258
Net Balance, Assets	227		258
Estimate of fair value [Member] | Securities available-for-sale [Member] | Residential mortgages [Member] | Others [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	94		84
Net Balance, Assets	94		84
Estimate of fair value [Member] | Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	3	[4]	465	[4]
Net Balance, Assets	3	[4]	465	[4]
Estimate of fair value [Member] | Mortgage servicing rights [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Balance, Assets	227	[5]	168	[5]
Net Balance, Assets	$ 227	[5]	$ 168	[5]

[1] Represents structured deposits risk-managed on a fair value basis for which we have elected to apply the fair value option.

[2] Includes trading derivative assets of $6.0 billion and $5.4 billion and trading derivative liabilities of $6.7 billion and $8.7 billion as of December 31, 2013 and 2012, respectively, as well as derivatives held for hedging and commitments accounted for as derivatives.

[3] Includes structured notes and own debt issuances which we have elected to measure on a fair value basis.

[4] Includes leveraged acquisition finance loans held for sale which we have elected to apply the fair value option. See Note 8, "Loans Held for Sale," for further information.

[5] See Note 10, "Intangible Assets," for additional information.

[6] Represents counterparty and cash collateral netting which allow the offsetting of amounts relating to certain contracts if certain conditions are met.