Fair Value Measurement-Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Level 3 | Other Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			$ 0
Level 3 | Other Liabilities | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			0
Netting | Other Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			0	[1]
Netting | Other Liabilities | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			0	[1]
Fair Value, Measurements, Recurring | Non-agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	10,568	[2]	9,424	[2]
Fair Value, Measurements, Recurring | Alt-A RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	258	[2]	279	[2]
Fair Value, Measurements, Recurring | Prime RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	526	[2]	728	[2]
Fair Value, Measurements, Recurring | Subprime RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	408	[2]	452	[2]
Fair Value, Measurements, Recurring | Foreign covered bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	2,855	[2]	3,718	[2]
Fair Value, Measurements, Recurring | Alt-A RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	1,792	[2],[3]	1,970	[2],[3]
Fair Value, Measurements, Recurring | Prime RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	850	[2],[3]	1,010	[2],[3]
Fair Value, Measurements, Recurring | Sub Prime RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	127	[2],[3]	130	[2],[3]
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	140	[4]	96	[4]
Subtotal assets of consolidated investment management funds, at fair value	22,529		28,418
Percentage of assets prior to netting (percent)	19.00%		21.00%
Derivative liabilities			5,108
Subtotal liabilities of consolidated investment management funds, at fair value	6,602		5,108
Percentage of liabilities prior to netting (percent)	19.00%		13.00%
Fair Value, Measurements, Recurring | Level 1 | Available-for-sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	13,628		23,256
Fair Value, Measurements, Recurring | Level 1 | Available-for-sale | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	10,431		18,003
Fair Value, Measurements, Recurring | Level 1 | Available-for-sale | Non-agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	40		41
Fair Value, Measurements, Recurring | Level 1 | Available-for-sale | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	23		27
Fair Value, Measurements, Recurring | Level 1 | Available-for-sale | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	941	[5]	2,190	[5]
Fair Value, Measurements, Recurring | Level 1 | Available-for-sale | Foreign covered bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	2,193		2,995
Fair Value, Measurements, Recurring | Level 1 | Trading Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Debt and equity instruments	4,153	[5]	912	[5]
Derivative Assets			3,521
Trading assets	7,737		4,433
Fair Value, Measurements, Recurring | Level 1 | Trading Assets | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets			3,364
Fair Value, Measurements, Recurring | Level 1 | Trading Assets | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets			121
Fair Value, Measurements, Recurring | Level 1 | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	203		157
Subtotal assets of consolidated investment management funds, at fair value	21,568
Percentage of assets prior to netting (percent)	20.00%
Fair Value, Measurements, Recurring | Level 1 | Operations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Subtotal assets of consolidated investment management funds, at fair value			27,846
Percentage of assets prior to netting (percent)			22.00%
Fair Value, Measurements, Recurring | Level 1 | Investment Management
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Trading assets	132		182
Other assets	829		390
Subtotal assets of consolidated investment management funds, at fair value	961		572
Trading liabilities	0		0
Other liabilities	0		0
Subtotal liabilities of consolidated investment management funds, at fair value	0		0
Fair Value, Measurements, Recurring | Level 1 | Trading Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Debt and equity instruments			1,121
Derivative liabilities			3,626
Trading liabilities			4,747
Fair Value, Measurements, Recurring | Level 1 | Trading Liabilities | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			3,535
Fair Value, Measurements, Recurring | Level 1 | Trading Liabilities | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			91
Fair Value, Measurements, Recurring | Level 1 | Other Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			361
Percentage of liabilities prior to netting (percent)			17.00%
Fair Value, Measurements, Recurring | Level 1 | Other Liabilities | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			0
Fair Value, Measurements, Recurring | Level 1 | Other Liabilities | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			361
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	142	[4]	116	[4]
Subtotal assets of consolidated investment management funds, at fair value	96,219		108,377
Percentage of assets prior to netting (percent)	81.00%		79.00%
Derivative liabilities			24,883
Long-term debt			345	[5]
Subtotal liabilities of consolidated investment management funds, at fair value	28,530		35,064
Percentage of liabilities prior to netting (percent)	81.00%		87.00%
Fair Value, Measurements, Recurring | Level 2 | Available-for-sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	63,420		69,318
Fair Value, Measurements, Recurring | Level 2 | Available-for-sale | U.S. Government agencies
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	1,081		1,074
Fair Value, Measurements, Recurring | Level 2 | Available-for-sale | Non-agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	10,528		9,383
Fair Value, Measurements, Recurring | Level 2 | Available-for-sale | State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	6,669	[5]	6,077	[5]
Fair Value, Measurements, Recurring | Level 2 | Available-for-sale | Agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	26,671		34,193
Fair Value, Measurements, Recurring | Level 2 | Available-for-sale | Alt-A RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	258		279
Fair Value, Measurements, Recurring | Level 2 | Available-for-sale | Prime RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	526		728
Fair Value, Measurements, Recurring | Level 2 | Available-for-sale | Subprime RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	408		452
Fair Value, Measurements, Recurring | Level 2 | Available-for-sale | Other RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	2,268		2,794
Fair Value, Measurements, Recurring | Level 2 | Available-for-sale | Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	2,563		3,139
Fair Value, Measurements, Recurring | Level 2 | Available-for-sale | Agency commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	1,289
Fair Value, Measurements, Recurring | Level 2 | Available-for-sale | Asset-backed CLOs
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	1,528		1,282
Fair Value, Measurements, Recurring | Level 2 | Available-for-sale | Other asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	2,496		2,131
Fair Value, Measurements, Recurring | Level 2 | Available-for-sale | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	1,504		1,585
Fair Value, Measurements, Recurring | Level 2 | Available-for-sale | Other debt securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	2,200		2,368
Fair Value, Measurements, Recurring | Level 2 | Available-for-sale | Foreign covered bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	662		723
Fair Value, Measurements, Recurring | Level 2 | Available-for-sale | Alt-A RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	1,792	[6]	1,970	[6]
Fair Value, Measurements, Recurring | Level 2 | Available-for-sale | Prime RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	850	[6]	1,010	[6]
Fair Value, Measurements, Recurring | Level 2 | Available-for-sale | Sub Prime RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	127	[6]	130	[6]
Fair Value, Measurements, Recurring | Level 2 | Trading Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Debt and equity instruments	4,641	[5]	4,116	[5]
Derivative Assets			23,034
Trading assets	20,803		27,150
Fair Value, Measurements, Recurring | Level 2 | Trading Assets | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets			148
Fair Value, Measurements, Recurring | Level 2 | Trading Assets | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets			152
Fair Value, Measurements, Recurring | Level 2 | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	1,266		1,044
Subtotal assets of consolidated investment management funds, at fair value	85,489
Percentage of assets prior to netting (percent)	80.00%
Fair Value, Measurements, Recurring | Level 2 | Operations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Subtotal assets of consolidated investment management funds, at fair value			97,512
Percentage of assets prior to netting (percent)			78.00%
Fair Value, Measurements, Recurring | Level 2 | Investment Management
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Trading assets	10,593		10,735
Other assets	137		130
Subtotal assets of consolidated investment management funds, at fair value	10,730		10,865
Trading liabilities	10,380		10,152
Other liabilities	78		29
Subtotal liabilities of consolidated investment management funds, at fair value	10,458		10,181
Fair Value, Measurements, Recurring | Level 2 | Trading Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Debt and equity instruments			659
Derivative liabilities			23,536
Trading liabilities			24,195
Fair Value, Measurements, Recurring | Level 2 | Trading Liabilities | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			23,173
Fair Value, Measurements, Recurring | Level 2 | Trading Liabilities | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			97
Fair Value, Measurements, Recurring | Level 2 | Trading Liabilities | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			266
Fair Value, Measurements, Recurring | Level 2 | Other Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			343
Percentage of liabilities prior to netting (percent)			82.00%
Fair Value, Measurements, Recurring | Level 2 | Other Liabilities | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			343
Fair Value, Measurements, Recurring | Level 2 | Other Liabilities | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			0
Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Subtotal assets of consolidated investment management funds, at fair value	181		315
Derivative liabilities			224
Subtotal liabilities of consolidated investment management funds, at fair value	92		224
Percentage of liabilities prior to netting (percent)	0.00%		0.00%
Fair Value, Measurements, Recurring | Level 3 | Available-for-sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	51		45
Fair Value, Measurements, Recurring | Level 3 | Available-for-sale | State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	51	[5]	45	[5]
Fair Value, Measurements, Recurring | Level 3 | Trading Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Debt and equity instruments	3	[5]	48	[5]
Derivative Assets			58
Trading assets	29		106
Fair Value, Measurements, Recurring | Level 3 | Trading Assets | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets			1
Fair Value, Measurements, Recurring | Level 3 | Trading Assets | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets			38
Fair Value, Measurements, Recurring | Level 3 | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	101	[4]	120	[4]
Subtotal assets of consolidated investment management funds, at fair value	181
Fair Value, Measurements, Recurring | Level 3 | Operations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Subtotal assets of consolidated investment management funds, at fair value			271
Fair Value, Measurements, Recurring | Level 3 | Investment Management
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Trading assets	0		44
Subtotal assets of consolidated investment management funds, at fair value	0		44
Trading liabilities	0		0
Other liabilities	0		0
Subtotal liabilities of consolidated investment management funds, at fair value	0		0
Fair Value, Measurements, Recurring | Level 3 | Trading Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			224
Trading liabilities			224
Fair Value, Measurements, Recurring | Level 3 | Trading Liabilities | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			168
Fair Value, Measurements, Recurring | Level 3 | Trading Liabilities | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			56
Fair Value, Measurements, Recurring | Level 3 | Other Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Percentage of liabilities prior to netting (percent)			1.00%
Fair Value, Measurements, Recurring | Netting
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Subtotal assets of consolidated investment management funds, at fair value	(16,468)		(22,311)	[1]
Derivative liabilities			(20,990)	[1]
Subtotal liabilities of consolidated investment management funds, at fair value	(14,975)	[1]	(20,990)	[1]
Fair Value, Measurements, Recurring | Netting | Trading Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Debt and equity instruments	0	[1],[5]
Derivative Assets			(22,311)	[1]
Trading assets	(16,468)	[1]	(22,311)	[1]
Fair Value, Measurements, Recurring | Netting | Trading Assets | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets			(2,171)	[1]
Fair Value, Measurements, Recurring | Netting | Trading Assets | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets			(98)	[1]
Fair Value, Measurements, Recurring | Netting | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	0	[1],[4]	0	[1],[4]
Subtotal assets of consolidated investment management funds, at fair value	(16,468)
Fair Value, Measurements, Recurring | Netting | Operations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Subtotal assets of consolidated investment management funds, at fair value			(22,311)	[1]
Fair Value, Measurements, Recurring | Netting | Investment Management
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Trading liabilities	0	[1]	0	[1]
Other liabilities	0	[1]	0	[1]
Subtotal liabilities of consolidated investment management funds, at fair value	0	[1]	0	[1]
Fair Value, Measurements, Recurring | Netting | Trading Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			(20,990)	[1]
Trading liabilities			(20,990)	[1]
Fair Value, Measurements, Recurring | Netting | Trading Liabilities | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			(19,069)	[1]
Fair Value, Measurements, Recurring | Netting | Trading Liabilities | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			(1,823)	[1]
Fair Value, Measurements, Recurring | Netting | Trading Liabilities | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			(98)	[1]
Fair Value, Measurements, Recurring | Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	383	[4]	332	[4]
Subtotal assets of consolidated investment management funds, at fair value	102,461		114,799
Derivative liabilities			9,225
Long-term debt			345	[5]
Subtotal liabilities of consolidated investment management funds, at fair value	20,249		19,406
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	77,099		92,619
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	10,431		18,003
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | U.S. Government agencies
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	1,081		1,074
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | Non-agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	10,568		9,424
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	6,720	[5]	6,122	[5]
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | Agency RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	26,671		34,193
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | Alt-A RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	258		279
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | Prime RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	526		728
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | Subprime RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	408		452
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | Other RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	2,268		2,794
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	2,563		3,139
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | Agency commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	1,289
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | Asset-backed CLOs
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	1,528		1,282
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | Other asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	2,496		2,131
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	23		27
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	941	[5]	2,190	[5]
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	1,504		1,585
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | Other debt securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	2,200		2,368
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | Foreign covered bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	2,855		3,718
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | Alt-A RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	1,792	[6]	1,970	[6]
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | Prime RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	850	[6]	1,010	[6]
Fair Value, Measurements, Recurring | Carrying Amount | Available-for-sale | Sub Prime RMBS
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale	127	[6]	130	[6]
Fair Value, Measurements, Recurring | Carrying Amount | Trading Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Debt and equity instruments	8,797	[5]	5,076	[5]
Derivative Assets			4,302
Trading assets	12,101		9,378
Fair Value, Measurements, Recurring | Carrying Amount | Trading Assets | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets			1,342
Fair Value, Measurements, Recurring | Carrying Amount | Trading Assets | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets			213
Fair Value, Measurements, Recurring | Carrying Amount | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	1,570		1,321
Subtotal assets of consolidated investment management funds, at fair value	90,770
Fair Value, Measurements, Recurring | Carrying Amount | Operations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Subtotal assets of consolidated investment management funds, at fair value			103,318
Fair Value, Measurements, Recurring | Carrying Amount | Investment Management
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Trading assets	10,725		10,961
Other assets	966		520
Subtotal assets of consolidated investment management funds, at fair value	11,691		11,481
Trading liabilities	10,380		10,152
Other liabilities	78		29
Subtotal liabilities of consolidated investment management funds, at fair value	10,458		10,181
Fair Value, Measurements, Recurring | Carrying Amount | Trading Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Debt and equity instruments			1,780
Derivative liabilities			6,396
Trading liabilities			8,176
Fair Value, Measurements, Recurring | Carrying Amount | Trading Liabilities | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			4,272
Fair Value, Measurements, Recurring | Carrying Amount | Trading Liabilities | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			1,809
Fair Value, Measurements, Recurring | Carrying Amount | Trading Liabilities | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			315
Fair Value, Measurements, Recurring | Carrying Amount | Other Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			704
Fair Value, Measurements, Recurring | Carrying Amount | Other Liabilities | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			343
Fair Value, Measurements, Recurring | Carrying Amount | Other Liabilities | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities			361
Nondesignated | Fair Value, Measurements, Recurring | Level 1 | Trading Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	3,584
Nondesignated | Fair Value, Measurements, Recurring | Level 1 | Trading Assets | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	5		36
Nondesignated | Fair Value, Measurements, Recurring | Level 1 | Trading Assets | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	3,414
Nondesignated | Fair Value, Measurements, Recurring | Level 1 | Trading Assets | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	165
Nondesignated | Fair Value, Measurements, Recurring | Level 2 | Trading Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	16,162
Nondesignated | Fair Value, Measurements, Recurring | Level 2 | Trading Assets | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	15,661		22,734
Nondesignated | Fair Value, Measurements, Recurring | Level 2 | Trading Assets | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	254
Nondesignated | Fair Value, Measurements, Recurring | Level 2 | Trading Assets | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	247
Nondesignated | Fair Value, Measurements, Recurring | Level 3 | Trading Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	26
Nondesignated | Fair Value, Measurements, Recurring | Level 3 | Trading Assets | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	9		19
Nondesignated | Fair Value, Measurements, Recurring | Level 3 | Trading Assets | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	1
Nondesignated | Fair Value, Measurements, Recurring | Level 3 | Trading Assets | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	16
Nondesignated | Fair Value, Measurements, Recurring | Netting | Trading Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	(16,468)	[1]
Nondesignated | Fair Value, Measurements, Recurring | Netting | Trading Assets | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	(14,303)	[1]	(20,042)	[1]
Nondesignated | Fair Value, Measurements, Recurring | Netting | Trading Assets | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	(2,005)	[1]
Nondesignated | Fair Value, Measurements, Recurring | Netting | Trading Assets | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	(160)	[1]
Nondesignated | Fair Value, Measurements, Recurring | Carrying Amount | Trading Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	3,304
Nondesignated | Fair Value, Measurements, Recurring | Carrying Amount | Trading Assets | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	1,372		2,747
Nondesignated | Fair Value, Measurements, Recurring | Carrying Amount | Trading Assets | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	1,664
Nondesignated | Fair Value, Measurements, Recurring | Carrying Amount | Trading Assets | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	268
Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 1 | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	63		61
Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 1 | Other Assets | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	0		0
Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 1 | Other Assets | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	63		61
Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 2 | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	1,124		928
Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 2 | Other Assets | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	1,124		928
Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 2 | Other Assets | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	0		0
Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 3 | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	0		0
Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 3 | Other Assets | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	0		0
Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 3 | Other Assets | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	0		0
Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Netting | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	0	[1]	0	[1]
Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Netting | Other Assets | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	0	[1]	0	[1]
Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Netting | Other Assets | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	0	[1]	0	[1]
Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Carrying Amount | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	1,187		989
Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Carrying Amount | Other Assets | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	1,124		928
Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Carrying Amount | Other Assets | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative Assets	63		61
Parent | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Subtotal liabilities of consolidated investment management funds, at fair value	6,602
Percentage of liabilities prior to netting (percent)	27.00%
Parent | Fair Value, Measurements, Recurring | Level 1 | Trading Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Debt and equity instruments	2,525
Derivative liabilities	3,817
Trading liabilities	6,342
Parent | Fair Value, Measurements, Recurring | Level 1 | Trading Liabilities | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	3,740
Parent | Fair Value, Measurements, Recurring | Level 1 | Trading Liabilities | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	77
Parent | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Long-term debt	326	[5]
Subtotal liabilities of consolidated investment management funds, at fair value	18,072
Percentage of liabilities prior to netting (percent)	73.00%
Parent | Fair Value, Measurements, Recurring | Level 2 | Trading Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Debt and equity instruments	733
Derivative liabilities	16,830
Trading liabilities	17,563
Parent | Fair Value, Measurements, Recurring | Level 2 | Trading Liabilities | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	16,200
Parent | Fair Value, Measurements, Recurring | Level 2 | Trading Liabilities | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	158
Parent | Fair Value, Measurements, Recurring | Level 2 | Trading Liabilities | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	472
Parent | Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Subtotal liabilities of consolidated investment management funds, at fair value	92
Percentage of liabilities prior to netting (percent)	0.00%
Parent | Fair Value, Measurements, Recurring | Level 3 | Trading Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	92
Trading liabilities	92
Parent | Fair Value, Measurements, Recurring | Level 3 | Trading Liabilities | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	53
Parent | Fair Value, Measurements, Recurring | Level 3 | Trading Liabilities | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	39
Parent | Fair Value, Measurements, Recurring | Netting
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Subtotal liabilities of consolidated investment management funds, at fair value	(14,975)	[1]
Parent | Fair Value, Measurements, Recurring | Netting | Trading Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	(14,975)	[1]
Trading liabilities	(14,975)	[1]
Parent | Fair Value, Measurements, Recurring | Netting | Trading Liabilities | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	(13,271)	[1]
Parent | Fair Value, Measurements, Recurring | Netting | Trading Liabilities | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	(1,544)	[1]
Parent | Fair Value, Measurements, Recurring | Netting | Trading Liabilities | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	(160)	[1]
Parent | Fair Value, Measurements, Recurring | Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Long-term debt	326	[5]
Subtotal liabilities of consolidated investment management funds, at fair value	9,791
Parent | Fair Value, Measurements, Recurring | Carrying Amount | Trading Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Debt and equity instruments	3,258
Derivative liabilities	5,764
Trading liabilities	9,022
Parent | Fair Value, Measurements, Recurring | Carrying Amount | Trading Liabilities | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	2,982
Parent | Fair Value, Measurements, Recurring | Carrying Amount | Trading Liabilities | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	2,354
Parent | Fair Value, Measurements, Recurring | Carrying Amount | Trading Liabilities | Equity Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	428
Parent | Designated as Hedging Instrument | Other Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	0
Parent | Designated as Hedging Instrument | Other Liabilities | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	0
Parent | Designated as Hedging Instrument | Netting | Other Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	0	[1]
Parent | Designated as Hedging Instrument | Netting | Other Liabilities | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	0	[1]
Parent | Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 1 | Other Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	260
Parent | Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 1 | Other Liabilities | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	0
Parent | Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 1 | Other Liabilities | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	260
Parent | Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 2 | Other Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	183
Parent | Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 2 | Other Liabilities | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	183
Parent | Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 2 | Other Liabilities | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	0
Parent | Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Carrying Amount | Other Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	443
Parent | Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Carrying Amount | Other Liabilities | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	183
Parent | Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Carrying Amount | Other Liabilities | Foreign Exchange Contract
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivative liabilities	$ 260

[1] ASC 815 permits the netting of derivative receivables and derivative payables under legally enforceable master netting agreements and permits the netting of cash collateral. Netting is applicable to derivatives not designated as hedging instruments included in trading assets or trading liabilities, and derivatives designated as hedging instruments included in other assets or other liabilities. Netting is allocated to the derivative products based on the net fair value of each product.

[2] At Sept. 30, 2013 and Dec. 31, 2012, foreign covered bonds and sovereign debt were included in Level 1 and Level 2 in the valuation hierarchy. All other assets in the table are Level 2 assets in the valuation hierarchy.

[3] Previously included in the Grantor Trust.

[4] Includes private equity investments, seed capital and a brokerage account.

[5] Includes certain interests in securitizations.

[6] Previously included in the Grantor Trust. The Grantor Trust was dissolved in 2011.