Fair Value Measurement - Recurring Basis (Details) - USD ($)	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	$ 565,250,000,000		$ 559,553,000,000
Derivative netting adjustments	(506,740,000,000)		(503,030,000,000)
Net derivative receivables	58,510,000,000		56,523,000,000
Trading assets	418,799,000,000		381,844,000,000
Available-for-sale securities	202,009,000,000		202,225,000,000
Loans	3,076,000,000		2,508,000,000
Mortgage servicing rights	6,241,000,000	$ 6,202,000,000	6,030,000,000	$ 5,753,000,000	$ 6,079,000,000	$ 6,096,000,000
Gross derivative payables	533,862,000,000		530,806,000,000
Derivative netting adjustments	(491,351,000,000)		(493,029,000,000)
Net derivative payables	42,511,000,000		37,777,000,000
Fair value assets and liabilities measured on recurring basis - supplemental data
Alternative investments, net asset value, fair value	764,000,000		779,000,000
Interest rate
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	281,011,000,000		315,992,000,000
Derivative netting adjustments	(258,040,000,000)		(291,319,000,000)
Net derivative receivables	22,971,000,000		24,673,000,000
Gross derivative payables	253,983,000,000		284,436,000,000
Derivative netting adjustments	(245,368,000,000)		(277,306,000,000)
Net derivative payables	8,615,000,000		7,129,000,000
Credit
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	20,934,000,000		23,205,000,000
Derivative netting adjustments	(20,310,000,000)		(22,335,000,000)
Net derivative receivables	624,000,000		869,000,000
Gross derivative payables	20,778,000,000		23,252,000,000
Derivative netting adjustments	(19,276,000,000)		(21,954,000,000)
Net derivative payables	1,502,000,000		1,299,000,000
Foreign exchange
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	196,472,000,000		160,231,000,000
Derivative netting adjustments	(179,709,000,000)		(144,081,000,000)
Net derivative receivables	16,763,000,000		16,151,000,000
Gross derivative payables	187,567,000,000		155,822,000,000
Derivative netting adjustments	(175,046,000,000)		(143,349,000,000)
Net derivative payables	12,521,000,000		12,473,000,000
Equity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	44,965,000,000		40,040,000,000
Derivative netting adjustments	(34,789,000,000)		(32,158,000,000)
Net derivative receivables	10,176,000,000		7,882,000,000
Gross derivative payables	48,384,000,000		45,395,000,000
Derivative netting adjustments	(36,902,000,000)		(36,203,000,000)
Net derivative payables	11,482,000,000		9,192,000,000
Commodity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	21,868,000,000		20,085,000,000
Derivative netting adjustments	(13,892,000,000)		(13,137,000,000)
Net derivative receivables	7,976,000,000		6,948,000,000
Gross derivative payables	23,150,000,000		21,901,000,000
Derivative netting adjustments	(14,759,000,000)		(14,217,000,000)
Net derivative payables	8,391,000,000		7,684,000,000
Other assets
Fair value assets and liabilities measured on recurring basis - supplemental data
Alternative investments, net asset value, fair value	714,000,000		725,000,000
Trading assets
Fair value assets and liabilities measured on recurring basis - supplemental data
Alternative investments, net asset value, fair value	50,000,000		54,000,000
U.S. government-sponsored enterprise obligations
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	39,100,000,000		45,800,000,000
Residential mortgage
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	14,800,000,000		11,400,000,000
Commercial mortgage
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	5,600,000,000		4,200,000,000
Residential conforming mortgage intended for sale to government agency
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	9,700,000,000		5,700,000,000
Reverse mortgage
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	0		836,000,000
Recurring
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Federal funds sold and securities purchased under resale agreements	12,793,000,000		14,732,000,000
Securities borrowed	4,052,000,000		3,049,000,000
Trading assets, debt and equity instruments	360,239,000,000		325,267,000,000
Derivative netting adjustments	(506,740,000,000)		(503,030,000,000)
Net derivative receivables	58,510,000,000		56,523,000,000
Trading assets	418,749,000,000		381,790,000,000
Available-for-sale securities	202,009,000,000		202,225,000,000
Loans	3,076,000,000		2,508,000,000
Mortgage servicing rights	6,241,000,000		6,030,000,000
Total assets measured at fair value on a recurring basis	660,075,000,000		625,737,000,000
Deposits	19,696,000,000		21,321,000,000
Federal funds purchased and securities loaned or sold under repurchase agreements	866,000,000		697,000,000
Short-term borrowings	8,730,000,000		9,191,000,000
Trading liabilities, Debt and equity instruments	107,327,000,000		85,886,000,000
Derivative netting adjustments	(491,351,000,000)		(493,029,000,000)
Net derivative payables	42,511,000,000		37,777,000,000
Trading liabilities	149,838,000,000		123,663,000,000
Accounts payable and other liabilities	6,633,000,000		9,208,000,000
Beneficial interests issued by consolidated VIEs	1,000,000		45,000,000
Long-term debt	50,096,000,000		47,519,000,000
Total liabilities measured at fair value on a recurring basis	235,860,000,000		211,644,000,000
Recurring | Interest rate
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Derivative netting adjustments	(258,040,000,000)		(291,319,000,000)
Net derivative receivables	22,971,000,000		24,673,000,000
Derivative netting adjustments	(245,368,000,000)		(277,306,000,000)
Net derivative payables	8,615,000,000		7,129,000,000
Recurring | Credit
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Derivative netting adjustments	(20,310,000,000)		(22,335,000,000)
Net derivative receivables	624,000,000		869,000,000
Derivative netting adjustments	(19,276,000,000)		(21,954,000,000)
Net derivative payables	1,502,000,000		1,299,000,000
Recurring | Foreign exchange
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Derivative netting adjustments	(179,709,000,000)		(144,081,000,000)
Net derivative receivables	16,763,000,000		16,151,000,000
Derivative netting adjustments	(175,046,000,000)		(143,349,000,000)
Net derivative payables	12,521,000,000		12,473,000,000
Recurring | Equity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Derivative netting adjustments	(34,789,000,000)		(32,158,000,000)
Net derivative receivables	10,176,000,000		7,882,000,000
Derivative netting adjustments	(36,902,000,000)		(36,203,000,000)
Net derivative payables	11,482,000,000		9,192,000,000
Recurring | Commodity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Derivative netting adjustments	(13,892,000,000)		(13,137,000,000)
Net derivative receivables	7,976,000,000		6,948,000,000
Derivative netting adjustments	(14,759,000,000)		(14,217,000,000)
Net derivative payables	8,391,000,000		7,684,000,000
Recurring | Other assets
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Other assets	13,155,000,000		15,403,000,000
Recurring | Total debt instruments
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	240,967,000,000		216,296,000,000
Recurring | Total mortgage-backed securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	41,688,000,000		45,373,000,000
Available-for-sale securities	79,429,000,000		86,672,000,000
Recurring | Mortgage-backed securities, U.S. government agencies
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	38,283,000,000		41,822,000,000
Available-for-sale securities	61,922,000,000		70,280,000,000
Recurring | Mortgage-backed securities, Residential - nonagency
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	2,088,000,000		1,895,000,000
Available-for-sale securities	9,680,000,000		11,367,000,000
Recurring | Mortgage-backed securities, Commercial - nonagency
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	1,317,000,000		1,656,000,000
Available-for-sale securities	7,827,000,000		5,025,000,000
Recurring | U.S. Treasury and government agencies
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	47,555,000,000		37,234,000,000
Available-for-sale securities	25,344,000,000		22,745,000,000
Recurring | Obligations of U.S. states and municipalities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	9,201,000,000		9,811,000,000
Available-for-sale securities	39,330,000,000		32,338,000,000
Recurring | Certificates of deposit, bankers’ acceptances and commercial paper
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	2,095,000,000		226,000,000
Recurring | Certificates of deposit
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	75,000,000		59,000,000
Recurring | Non-U.S. government debt securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	66,617,000,000		57,796,000,000
Available-for-sale securities	25,686,000,000		27,294,000,000
Recurring | Corporate debt securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	24,845,000,000		24,458,000,000
Available-for-sale securities	2,133,000,000		2,757,000,000
Recurring | Loans
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	45,877,000,000		37,961,000,000
Recurring | Asset-backed securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	3,089,000,000		3,437,000,000
Recurring | Asset-backed securities, Collateralized loan obligations
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	21,146,000,000		20,996,000,000
Recurring | Asset-backed securities, Other
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	8,866,000,000		8,817,000,000
Recurring | Equity securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	98,915,000,000		87,838,000,000
Available-for-sale securities			547,000,000
Recurring | Physical commodities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	6,678,000,000		6,246,000,000
Recurring | Other
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	13,679,000,000		14,887,000,000
Recurring | U.S. government-sponsored enterprise obligations
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	65,600,000,000		78,000,000,000
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, debt and equity instruments	176,428,000,000		151,915,000,000
Gross derivative receivables	2,025,000,000		1,022,000,000
Trading assets	178,453,000,000		152,937,000,000
Available-for-sale securities	42,703,000,000		41,432,000,000
Loans	0		0
Mortgage servicing rights	0		0
Total assets measured at fair value on a recurring basis	233,029,000,000		208,164,000,000
Deposits	0		0
Federal funds purchased and securities loaned or sold under repurchase agreements	0		0
Short-term borrowings	0		0
Trading liabilities, Debt and equity instruments	82,507,000,000		64,664,000,000
Gross derivative payables	2,100,000,000		964,000,000
Trading liabilities	84,607,000,000		65,628,000,000
Accounts payable and other liabilities	6,568,000,000		9,074,000,000
Beneficial interests issued by consolidated VIEs	0		0
Long-term debt	0		0
Total liabilities measured at fair value on a recurring basis	91,175,000,000		74,702,000,000
Recurring | Level 1 | Interest rate
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	528,000,000		181,000,000
Gross derivative payables	561,000,000		170,000,000
Recurring | Level 1 | Credit
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	0		0
Gross derivative payables	0		0
Recurring | Level 1 | Foreign exchange
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	1,497,000,000		841,000,000
Gross derivative payables	1,539,000,000		794,000,000
Recurring | Level 1 | Equity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	0		0
Gross derivative payables	0		0
Recurring | Level 1 | Commodity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	0		0
Gross derivative payables	0		0
Recurring | Level 1 | Other assets
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Other assets	11,873,000,000		13,795,000,000
Recurring | Level 1 | Total debt instruments
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	73,150,000,000		59,645,000,000
Recurring | Level 1 | Total mortgage-backed securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	0		0
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, debt and equity instruments	0		0
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, debt and equity instruments	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, debt and equity instruments	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, debt and equity instruments	38,363,000,000		30,758,000,000
Available-for-sale securities	25,344,000,000		22,745,000,000
Recurring | Level 1 | Obligations of U.S. states and municipalities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	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, debt and equity instruments	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, debt and equity instruments	34,787,000,000		28,887,000,000
Available-for-sale securities	17,359,000,000		18,140,000,000
Recurring | Level 1 | Corporate debt securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	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, debt and equity instruments	0		0
Recurring | Level 1 | Asset-backed securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	0		0
Recurring | Level 1 | Asset-backed securities, 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, debt and equity instruments	98,142,000,000		87,346,000,000
Available-for-sale securities			547,000,000
Recurring | Level 1 | Physical commodities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	5,136,000,000		4,924,000,000
Recurring | Level 1 | Other
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	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	12,793,000,000		14,732,000,000
Securities borrowed	4,052,000,000		3,049,000,000
Trading assets, debt and equity instruments	179,268,000,000		167,982,000,000
Gross derivative receivables	556,238,000,000		552,533,000,000
Trading assets	735,506,000,000		720,515,000,000
Available-for-sale securities	159,158,000,000		160,516,000,000
Loans	2,917,000,000		2,232,000,000
Mortgage servicing rights	0		0
Total assets measured at fair value on a recurring basis	914,483,000,000		901,387,000,000
Deposits	15,391,000,000		17,179,000,000
Federal funds purchased and securities loaned or sold under repurchase agreements	866,000,000		697,000,000
Short-term borrowings	6,521,000,000		7,526,000,000
Trading liabilities, Debt and equity instruments	24,777,000,000		21,183,000,000
Gross derivative payables	521,665,000,000		519,594,000,000
Trading liabilities	546,442,000,000		540,777,000,000
Accounts payable and other liabilities	57,000,000		121,000,000
Beneficial interests issued by consolidated VIEs	0		6,000,000
Long-term debt	31,834,000,000		31,394,000,000
Total liabilities measured at fair value on a recurring basis	601,111,000,000		597,700,000,000
Recurring | Level 2 | Interest rate
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	278,652,000,000		314,107,000,000
Gross derivative payables	252,080,000,000		282,825,000,000
Recurring | Level 2 | Credit
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	19,917,000,000		21,995,000,000
Gross derivative payables	19,737,000,000		22,009,000,000
Recurring | Level 2 | Foreign exchange
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	194,169,000,000		158,834,000,000
Gross derivative payables	184,977,000,000		154,075,000,000
Recurring | Level 2 | Equity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	41,798,000,000		37,722,000,000
Gross derivative payables	42,639,000,000		39,668,000,000
Recurring | Level 2 | Commodity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	21,702,000,000		19,875,000,000
Gross derivative payables	22,232,000,000		21,017,000,000
Recurring | Level 2 | Other assets
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Other assets	57,000,000		343,000,000
Recurring | Level 2 | Total debt instruments
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	163,968,000,000		152,266,000,000
Recurring | Level 2 | Total mortgage-backed securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	41,105,000,000		44,995,000,000
Available-for-sale securities	79,428,000,000		86,671,000,000
Recurring | Level 2 | Mortgage-backed securities, U.S. government agencies
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	37,805,000,000		41,515,000,000
Available-for-sale securities	61,922,000,000		70,280,000,000
Recurring | Level 2 | Mortgage-backed securities, Residential - nonagency
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	2,001,000,000		1,835,000,000
Available-for-sale securities	9,679,000,000		11,366,000,000
Recurring | Level 2 | Mortgage-backed securities, Commercial - nonagency
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	1,299,000,000		1,645,000,000
Available-for-sale securities	7,827,000,000		5,025,000,000
Recurring | Level 2 | U.S. Treasury and government agencies
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	9,192,000,000		6,475,000,000
Available-for-sale securities	0		0
Recurring | Level 2 | Obligations of U.S. states and municipalities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	8,465,000,000		9,067,000,000
Available-for-sale securities	39,330,000,000		32,338,000,000
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, debt and equity instruments	2,095,000,000		226,000,000
Recurring | Level 2 | Certificates of deposit
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	75,000,000		59,000,000
Recurring | Level 2 | Non-U.S. government debt securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	31,647,000,000		28,831,000,000
Available-for-sale securities	8,327,000,000		9,154,000,000
Recurring | Level 2 | Corporate debt securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	24,571,000,000		24,146,000,000
Available-for-sale securities	2,133,000,000		2,757,000,000
Recurring | Level 2 | Loans
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	43,891,000,000		35,242,000,000
Recurring | Level 2 | Asset-backed securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	3,002,000,000		3,284,000,000
Recurring | Level 2 | Asset-backed securities, Collateralized loan obligations
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	20,999,000,000		20,720,000,000
Recurring | Level 2 | Asset-backed securities, Other
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	8,866,000,000		8,817,000,000
Recurring | Level 2 | Equity securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	485,000,000		197,000,000
Available-for-sale securities			0
Recurring | Level 2 | Physical commodities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	1,542,000,000		1,322,000,000
Recurring | Level 2 | Other
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	13,273,000,000		14,197,000,000
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, debt and equity instruments	4,543,000,000		5,370,000,000
Gross derivative receivables	6,987,000,000		5,998,000,000
Trading assets	11,530,000,000		11,368,000,000
Available-for-sale securities	148,000,000		277,000,000
Loans	159,000,000		276,000,000
Mortgage servicing rights	6,241,000,000		6,030,000,000
Total assets measured at fair value on a recurring basis	19,303,000,000		19,216,000,000
Deposits	4,305,000,000		4,142,000,000
Federal funds purchased and securities loaned or sold under repurchase agreements	0		0
Short-term borrowings	2,209,000,000		1,665,000,000
Trading liabilities, Debt and equity instruments	43,000,000		39,000,000
Gross derivative payables	10,097,000,000		10,248,000,000
Trading liabilities	10,140,000,000		10,287,000,000
Accounts payable and other liabilities	8,000,000		13,000,000
Beneficial interests issued by consolidated VIEs	1,000,000		39,000,000
Long-term debt	18,262,000,000		16,125,000,000
Total liabilities measured at fair value on a recurring basis	34,925,000,000		32,271,000,000
Recurring | Level 3 | Interest rate
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	1,831,000,000		1,704,000,000
Gross derivative payables	1,342,000,000		1,440,000,000
Recurring | Level 3 | Credit
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	1,017,000,000		1,209,000,000
Gross derivative payables	1,041,000,000		1,244,000,000
Recurring | Level 3 | Foreign exchange
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	806,000,000		557,000,000
Gross derivative payables	1,051,000,000		953,000,000
Recurring | Level 3 | Equity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	3,167,000,000		2,318,000,000
Gross derivative payables	5,745,000,000		5,727,000,000
Recurring | Level 3 | Commodity
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Gross derivative receivables	166,000,000		210,000,000
Gross derivative payables	918,000,000		884,000,000
Recurring | Level 3 | Other assets
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Other assets	1,225,000,000		1,265,000,000
Recurring | Level 3 | Total debt instruments
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	3,849,000,000		4,385,000,000
Recurring | Level 3 | Total mortgage-backed securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	583,000,000		378,000,000
Available-for-sale securities	1,000,000		1,000,000
Recurring | Level 3 | Mortgage-backed securities, U.S. government agencies
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	478,000,000		307,000,000
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, debt and equity instruments	87,000,000		60,000,000
Available-for-sale securities	1,000,000		1,000,000
Recurring | Level 3 | Mortgage-backed securities, Commercial - nonagency
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	18,000,000		11,000,000
Available-for-sale securities	0		0
Recurring | Level 3 | U.S. Treasury and government agencies
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	0		1,000,000
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, debt and equity instruments	736,000,000		744,000,000
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, debt and equity instruments	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, debt and equity instruments	183,000,000		78,000,000
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, debt and equity instruments	274,000,000		312,000,000
Available-for-sale securities	0		0
Recurring | Level 3 | Loans
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	1,986,000,000		2,719,000,000
Recurring | Level 3 | Asset-backed securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	87,000,000		153,000,000
Recurring | Level 3 | Asset-backed securities, Collateralized loan obligations
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	147,000,000		276,000,000
Recurring | Level 3 | Asset-backed securities, Other
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Available-for-sale securities	0		0
Recurring | Level 3 | Equity securities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	288,000,000		295,000,000
Available-for-sale securities			0
Recurring | Level 3 | Physical commodities
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	0		0
Recurring | Level 3 | Other
Assets and liabilities measured at fair value on a recurring basis [Abstract]
Trading assets, debt and equity instruments	$ 406,000,000		$ 690,000,000