Fair value measurement - Recurring Basis (Details) - USD ($) $ in Millions	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	$ 1,055,096		$ 1,328,428
Derivative netting adjustments	(986,428)		(1,249,453)
Derivative receivables, net	68,668		78,975
Trading assets	361,708		398,988
Available-for-sale securities	256,491		298,752
Mortgage servicing rights	6,716	$ 7,571	7,436	$ 8,236	$ 8,347	$ 9,614
Derivative payables, gross	1,037,512		1,310,773
Derivative netting adjustments	(980,372)		(1,239,657)
Derivative payables, net	57,140		71,116
Fair value assets and liabilities measured on recurring basis - supplemental data
Alternative investments, net asset value, fair value	1,400		1,500
Reduction in level 3 derivative receivable and derivative payable balances	1,800		2,500
Costs of the private equity investment portfolio	3,600		6,000
Interest rate
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	738,951		950,257
Derivative netting adjustments	(709,835)		(916,532)
Derivative receivables, net	29,116		33,725
Derivative payables, gross	701,839		918,379
Derivative netting adjustments	(691,114)		(900,634)
Derivative payables, net	10,725		17,745
Credit
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	54,409		76,842
Derivative netting adjustments	(52,685)		(75,004)
Derivative receivables, net	1,724		1,838
Derivative payables, gross	53,111		75,895
Derivative netting adjustments	(51,465)		(74,302)
Derivative payables, net	1,646		1,593
Foreign exchange
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	186,549		215,187
Derivative netting adjustments	(165,433)		(193,934)
Derivative receivables, net	21,116		21,253
Derivative payables, gross	202,453		224,614
Derivative netting adjustments	(180,409)		(201,644)
Derivative payables, net	22,044		22,970
Equity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	46,727		42,489
Derivative netting adjustments	(39,237)		(34,312)
Derivative receivables, net	7,490		8,177
Derivative payables, gross	47,549		46,262
Derivative netting adjustments	(38,543)		(34,522)
Derivative payables, net	9,006		11,740
Commodity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	28,460		43,653
Derivative netting adjustments	(19,238)		(29,671)
Derivative receivables, net	9,222		13,982
Derivative payables, gross	32,560		45,623
Derivative netting adjustments	(18,841)		(28,555)
Derivative payables, net	13,719		17,068
Other assets
Fair value assets and liabilities measured on recurring basis - supplemental data
Alternative investments, net asset value, fair value	1,300		1,400
Loans reported as trading assets
Fair value assets and liabilities measured on recurring basis - supplemental data
Alternative investments, net asset value, fair value	81		124
U.S. government-sponsored enterprise obligations
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	41,600		59,300
Residential real estate
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	13,100		17,000
Commercial mortgage
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	5,200		5,800
Residential conforming mortgage intended for sale to government agency
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	6,000		7,700
Reverse mortgage
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	2,700		3,400
Fair Value Hierarchy, Previous Classification, Level 2
Fair value assets and liabilities measured on recurring basis - supplemental data
Alternative investments, net asset value, fair value			337
Fair Value Hierarchy, Previous Classification, Level 3
Fair value assets and liabilities measured on recurring basis - supplemental data
Alternative investments, net asset value, fair value			1,200
Recurring
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Federal funds sold and securities purchased under resale agreements	27,433		28,585
Securities borrowed	405		992
Trading assets	292,959		319,889
Derivative netting adjustments	(986,428)		(1,249,453)
Derivative receivables, net	68,668		78,975
Trading assets	361,627		398,864
Available-for-sale securities	256,491		298,752
Loans	3,135		2,611
Mortgage servicing rights	6,716		7,436
Total assets measured at fair value on a recurring basis	662,183		747,731
Deposits	11,062		8,807
Federal funds purchased and securities loaned or sold under repurchase agreements	3,565		2,979
Other borrowed funds	9,665		14,739
Trading liabilities, Debt and equity instruments	84,334		81,699
Derivative netting adjustments	(980,372)		(1,239,657)
Derivative payables, net	57,140		71,116
Trading liabilities	141,474		152,815
Accounts payable and other liabilities	5,850		4,155
Beneficial interests issued by consolidated VIEs	1,199		2,162
Long-term debt	31,160		30,226
Total liabilities measured at fair value on a recurring basis	203,975		215,883
Recurring | Interest rate
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Derivative netting adjustments	(709,835)		(916,532)
Derivative receivables, net	29,116		33,725
Derivative netting adjustments	(691,114)		(900,634)
Derivative payables, net	10,725		17,745
Recurring | Credit
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Derivative netting adjustments	(52,685)		(75,004)
Derivative receivables, net	1,724		1,838
Derivative netting adjustments	(51,465)		(74,302)
Derivative payables, net	1,646		1,593
Recurring | Foreign exchange
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Derivative netting adjustments	(165,433)		(193,934)
Derivative receivables, net	21,116		21,253
Derivative netting adjustments	(180,409)		(201,644)
Derivative payables, net	22,044		22,970
Recurring | Equity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Derivative netting adjustments	(39,237)		(34,312)
Derivative receivables, net	7,490		8,177
Derivative netting adjustments	(38,543)		(34,522)
Derivative payables, net	9,006		11,740
Recurring | Commodity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Derivative netting adjustments	(19,238)		(29,671)
Derivative receivables, net	9,222		13,982
Derivative netting adjustments	(18,841)		(28,555)
Derivative payables, net	13,719		17,068
Recurring | Private equity investments
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Other	1,912		5,497
Recurring | All other
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Other	4,464		4,994
Recurring | Other assets
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Other	7,700		11,909
Recurring | Total debt instruments
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	197,183		199,650
Recurring | Total mortgage-backed securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	38,529		36,117
Available-for-sale securities	114,076		137,322
Recurring | Mortgage-backed securities, U.S. government agencies
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	35,829		32,840
Available-for-sale securities	54,578		65,319
Recurring | Mortgage-backed securities, Residential - nonagency
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	1,624		2,044
Available-for-sale securities	36,605		50,895
Recurring | Mortgage-backed securities, Commercial - nonagency
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	1,076		1,233
Available-for-sale securities	22,893		21,108
Recurring | U.S. Treasury and government agencies
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	29,759		26,276
Available-for-sale securities	11,347		13,645
Recurring | Obligations of U.S. states and municipalities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	7,115		10,571
Available-for-sale securities	32,709		30,068
Recurring | Certificates of deposit, bankers’ acceptances and commercial paper
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	525		1,429
Recurring | Certificates of deposit
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	418		1,103
Recurring | Non-U.S. government debt securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	56,829		53,450
Available-for-sale securities	39,120		52,743
Recurring | Corporate debt securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	26,248		31,088
Available-for-sale securities	14,781		18,532
Recurring | Loans
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	33,823		36,367
Recurring | Asset-backed securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	4,355		4,352
Recurring | Collateralized loan obligations
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	31,304		30,194
Recurring | Asset-backed securities, Other
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	10,131		12,615
Recurring | Equity securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	80,671		105,945
Available-for-sale securities	2,605		2,530
Recurring | Physical commodities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	3,985		4,482
Recurring | Other
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	11,120		9,812
Recurring | U.S. government-sponsored enterprise obligations
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	67,500		84,100
Recurring | Level 1
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Federal funds sold and securities purchased under resale agreements	0		0
Securities borrowed	0		0
Trading assets	133,596		151,313
Gross derivative receivables	1,652		1,478
Trading assets	135,248		152,791
Available-for-sale securities	37,538		40,195
Loans	0		0
Mortgage servicing rights	0		0
Total assets measured at fair value on a recurring basis	176,550		197,652
Deposits	0		0
Federal funds purchased and securities loaned or sold under repurchase agreements	0		0
Other borrowed funds	0		0
Trading liabilities, Debt and equity instruments	64,715		62,914
Derivative payables, gross	1,637		1,386
Trading liabilities	66,352		64,300
Accounts payable and other liabilities	5,829		4,129
Beneficial interests issued by consolidated VIEs	0		0
Long-term debt	0		0
Total liabilities measured at fair value on a recurring basis	72,181		68,429
Recurring | Level 1 | Interest rate
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	657		473
Derivative payables, gross	629		499
Recurring | Level 1 | Credit
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	0		0
Derivative payables, gross	0		0
Recurring | Level 1 | Foreign exchange
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	777		758
Derivative payables, gross	876		746
Recurring | Level 1 | Equity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	0		0
Derivative payables, gross	0		0
Recurring | Level 1 | Commodity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	218		247
Derivative payables, gross	132		141
Recurring | Level 1 | Private equity investments
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Other	148		648
Recurring | Level 1 | All other
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Other	3,616		4,018
Recurring | Level 1 | Other assets
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Other	3,764		4,666
Recurring | Level 1 | Total debt instruments
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	50,805		43,684
Recurring | Level 1 | Total mortgage-backed securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	5		14
Available-for-sale securities	0		0
Recurring | Level 1 | Mortgage-backed securities, U.S. government agencies
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	5		14
Available-for-sale securities	0		0
Recurring | Level 1 | Mortgage-backed securities, Residential - nonagency
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	0		0
Available-for-sale securities	0		0
Recurring | Level 1 | Mortgage-backed securities, Commercial - nonagency
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	0		0
Available-for-sale securities	0		0
Recurring | Level 1 | U.S. Treasury and government agencies
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	22,451		17,816
Available-for-sale securities	11,305		13,591
Recurring | Level 1 | Obligations of U.S. states and municipalities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	0		0
Available-for-sale securities	0		0
Recurring | Level 1 | Certificates of deposit, bankers’ acceptances and commercial paper
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	0		0
Recurring | Level 1 | Certificates of deposit
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	0		0
Recurring | Level 1 | Non-U.S. government debt securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	28,349		25,854
Available-for-sale securities	23,628		24,074
Recurring | Level 1 | Corporate debt securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	0		0
Available-for-sale securities	0		0
Recurring | Level 1 | Loans
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	0		0
Recurring | Level 1 | Asset-backed securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	0		0
Recurring | Level 1 | Collateralized loan obligations
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	0		0
Recurring | Level 1 | Asset-backed securities, Other
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	0		0
Recurring | Level 1 | Equity securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	79,946		104,890
Available-for-sale securities	2,605		2,530
Recurring | Level 1 | Physical commodities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	2,845		2,739
Recurring | Level 1 | Other
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	0		0
Recurring | Level 2
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Federal funds sold and securities purchased under resale agreements	27,433		28,585
Securities borrowed	405		992
Trading assets	146,284		146,087
Gross derivative receivables	1,044,566		1,314,385
Trading assets	1,190,850		1,460,472
Available-for-sale securities	218,118		257,520
Loans	260		70
Mortgage servicing rights	0		0
Total assets measured at fair value on a recurring basis	1,437,159		1,750,280
Deposits	7,685		5,948
Federal funds purchased and securities loaned or sold under repurchase agreements	3,565		2,979
Other borrowed funds	8,897		13,286
Trading liabilities, Debt and equity instruments	19,552		18,713
Derivative payables, gross	1,025,061		1,294,761
Trading liabilities	1,044,613		1,313,474
Accounts payable and other liabilities	0		0
Beneficial interests issued by consolidated VIEs	181		1,016
Long-term debt	20,304		18,349
Total liabilities measured at fair value on a recurring basis	1,085,245		1,355,052
Recurring | Level 2 | Interest rate
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	735,468		945,635
Derivative payables, gross	699,215		914,357
Recurring | Level 2 | Credit
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	51,967		73,853
Derivative payables, gross	51,181		73,095
Recurring | Level 2 | Foreign exchange
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	183,986		212,153
Derivative payables, gross	199,256		221,066
Recurring | Level 2 | Equity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	45,246		39,937
Derivative payables, gross	44,544		41,925
Recurring | Level 2 | Commodity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	27,899		42,807
Derivative payables, gross	30,865		44,318
Recurring | Level 2 | Private equity investments
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Other	64		2,624
Recurring | Level 2 | All other
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Other	29		17
Recurring | Level 2 | Other assets
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Other	93		2,641
Recurring | Level 2 | Total debt instruments
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	134,129		134,960
Recurring | Level 2 | Total mortgage-backed securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	37,590		34,212
Available-for-sale securities	114,071		137,193
Recurring | Level 2 | Mortgage-backed securities, U.S. government agencies
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	35,038		31,904
Available-for-sale securities	54,578		65,319
Recurring | Level 2 | Mortgage-backed securities, Residential - nonagency
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	1,505		1,381
Available-for-sale securities	36,600		50,865
Recurring | Level 2 | Mortgage-backed securities, Commercial - nonagency
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	1,047		927
Available-for-sale securities	22,893		21,009
Recurring | Level 2 | U.S. Treasury and government agencies
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	7,308		8,460
Available-for-sale securities	42		54
Recurring | Level 2 | Obligations of U.S. states and municipalities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	6,543		9,298
Available-for-sale securities	32,709		30,068
Recurring | Level 2 | Certificates of deposit, bankers’ acceptances and commercial paper
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	525		1,429
Recurring | Level 2 | Certificates of deposit
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	418		1,103
Recurring | Level 2 | Non-U.S. government debt securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	28,394		27,294
Available-for-sale securities	15,492		28,669
Recurring | Level 2 | Corporate debt securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	25,411		28,099
Available-for-sale securities	14,781		18,532
Recurring | Level 2 | Loans
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	25,809		23,080
Recurring | Level 2 | Asset-backed securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	2,549		3,088
Recurring | Level 2 | Collateralized loan obligations
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	30,549		29,402
Recurring | Level 2 | Asset-backed securities, Other
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	10,056		12,499
Recurring | Level 2 | Equity securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	390		624
Available-for-sale securities	0		0
Recurring | Level 2 | Physical commodities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	1,140		1,741
Recurring | Level 2 | Other
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	10,625		8,762
Recurring | Level 3
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Federal funds sold and securities purchased under resale agreements	0		0
Securities borrowed	0		0
Trading assets	13,079		22,489
Gross derivative receivables	8,878		12,565
Trading assets	21,957		35,054
Available-for-sale securities	835		1,037
Loans	2,875		2,541
Mortgage servicing rights	6,716		7,436
Total assets measured at fair value on a recurring basis	34,902		49,252
Deposits	3,377		2,859
Federal funds purchased and securities loaned or sold under repurchase agreements	0		0
Other borrowed funds	768		1,453
Trading liabilities, Debt and equity instruments	67		72
Derivative payables, gross	10,814		14,626
Trading liabilities	10,881		14,698
Accounts payable and other liabilities	21		26
Beneficial interests issued by consolidated VIEs	1,018		1,146
Long-term debt	10,856		11,877
Total liabilities measured at fair value on a recurring basis	26,921		32,059
Recurring | Level 3 | Interest rate
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	2,826		4,149
Derivative payables, gross	1,995		3,523
Recurring | Level 3 | Credit
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	2,442		2,989
Derivative payables, gross	1,930		2,800
Recurring | Level 3 | Foreign exchange
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	1,786		2,276
Derivative payables, gross	2,321		2,802
Recurring | Level 3 | Equity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	1,481		2,552
Derivative payables, gross	3,005		4,337
Recurring | Level 3 | Commodity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	343		599
Derivative payables, gross	1,563		1,164
Recurring | Level 3 | Private equity investments
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Other	1,700		2,225
Recurring | Level 3 | All other
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Other	819		959
Recurring | Level 3 | Other assets
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Other	2,519		3,184
Recurring | Level 3 | Total debt instruments
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	12,249		21,006
Recurring | Level 3 | Total mortgage-backed securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	934		1,891
Available-for-sale securities	5		129
Recurring | Level 3 | Mortgage-backed securities, U.S. government agencies
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	786		922
Available-for-sale securities	0		0
Recurring | Level 3 | Mortgage-backed securities, Residential - nonagency
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	119		663
Available-for-sale securities	5		30
Recurring | Level 3 | Mortgage-backed securities, Commercial - nonagency
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	29		306
Available-for-sale securities	0		99
Recurring | Level 3 | U.S. Treasury and government agencies
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	0		0
Available-for-sale securities	0		0
Recurring | Level 3 | Obligations of U.S. states and municipalities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	572		1,273
Available-for-sale securities	0		0
Recurring | Level 3 | Certificates of deposit, bankers’ acceptances and commercial paper
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	0		0
Recurring | Level 3 | Certificates of deposit
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	0		0
Recurring | Level 3 | Non-U.S. government debt securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	86		302
Available-for-sale securities	0		0
Recurring | Level 3 | Corporate debt securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	837		2,989
Available-for-sale securities	0		0
Recurring | Level 3 | Loans
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	8,014		13,287
Recurring | Level 3 | Asset-backed securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	1,806		1,264
Recurring | Level 3 | Collateralized loan obligations
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	755		792
Recurring | Level 3 | Asset-backed securities, Other
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	75		116
Recurring | Level 3 | Equity securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	335		431
Available-for-sale securities	0		0
Recurring | Level 3 | Physical commodities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	0		2
Recurring | Level 3 | Other
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets	495		1,050
Recurring, Excluding Amounts Measured at NAV [Member] | Other assets
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Other	$ 6,376		$ 10,491