Fair Value Measurement - Changes in Level 3 Recurring Measurements (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Net derivative receivables:
Fair value, beginning balance	$ (3,349,000,000)	$ (2,842,000,000)	$ (3,796,000,000)	$ (4,250,000,000)
Total realized/unrealized gains/(losses)	(602,000,000)	510,000,000	78,000,000	1,550,000,000
Purchases	92,000,000	658,000,000	242,000,000	894,000,000
Sales	(310,000,000)	(1,101,000,000)	(852,000,000)	(1,354,000,000)
Settlements	(202,000,000)	(415,000,000)	(94,000,000)	92,000,000
Transfers into level 3	(187,000,000)	(103,000,000)	(240,000,000)	(222,000,000)
Transfers (out of) level 3	121,000,000	183,000,000	225,000,000	180,000,000
Fair value, ending balance	(4,437,000,000)	(3,110,000,000)	(4,437,000,000)	(3,110,000,000)
Change in unrealized gains/(losses) related to financial instruments held	$ (758,000,000)	269,000,000	$ (673,000,000)	1,183,000,000
Level 3 Rollforward Supplemental Data [Abstract]
Level 3 assets as a percentage of total firm assets at fair value	2.00%		2.00%		3.00%
Level 3 liabilities as a percentage of total firm liabilities at fair value	15.00%		15.00%		15.00%
Deposits
Liabilities:
Fair value, beginning balance	$ 4,528,000,000	4,017,000,000	$ 4,169,000,000	4,142,000,000
Total realized/unrealized (gains)/losses	89,000,000	49,000,000	241,000,000	(41,000,000)
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	92,000,000	434,000,000	427,000,000	755,000,000
Settlements	(292,000,000)	(57,000,000)	(316,000,000)	(255,000,000)
Transfers into level 3	0	1,000,000	0	1,000,000
Transfers (out of) level 3	(351,000,000)	(139,000,000)	(455,000,000)	(297,000,000)
Fair value, ending balance	4,066,000,000	4,305,000,000	4,066,000,000	4,305,000,000
Change in unrealized (gains)/losses related to financials instruments held	104,000,000	50,000,000	246,000,000	(86,000,000)
Short-term borrowings
Liabilities:
Fair value, beginning balance	1,502,000,000	2,125,000,000	1,523,000,000	1,665,000,000
Total realized/unrealized (gains)/losses	72,000,000	(197,000,000)	118,000,000	(182,000,000)
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	1,037,000,000	862,000,000	1,688,000,000	2,070,000,000
Settlements	(624,000,000)	(614,000,000)	(1,225,000,000)	(1,360,000,000)
Transfers into level 3	67,000,000	43,000,000	68,000,000	55,000,000
Transfers (out of) level 3	(2,000,000)	(10,000,000)	(120,000,000)	(39,000,000)
Fair value, ending balance	2,052,000,000	2,209,000,000	2,052,000,000	2,209,000,000
Change in unrealized (gains)/losses related to financials instruments held	28,000,000	(27,000,000)	115,000,000	(31,000,000)
Total debt and equity instruments
Liabilities:
Fair value, beginning balance	52,000,000	50,000,000	50,000,000	39,000,000
Total realized/unrealized (gains)/losses	0	(11,000,000)	0	(8,000,000)
Purchases	(5,000,000)	(25,000,000)	(7,000,000)	(62,000,000)
Sales	5,000,000	33,000,000	16,000,000	76,000,000
Issuances	0	0	0	0
Settlements	0	0	0	1,000,000
Transfers into level 3	4,000,000	0	7,000,000	2,000,000
Transfers (out of) level 3	(11,000,000)	(4,000,000)	(21,000,000)	(5,000,000)
Fair value, ending balance	45,000,000	43,000,000	45,000,000	43,000,000
Change in unrealized (gains)/losses related to financials instruments held	0	(4,000,000)	1,000,000	(1,000,000)
Accounts payable and other liabilities
Liabilities:
Fair value, beginning balance	15,000,000	7,000,000	10,000,000	13,000,000
Total realized/unrealized (gains)/losses	(1,000,000)	(1,000,000)	(1,000,000)	(1,000,000)
Purchases	(3,000,000)	0	(8,000,000)	(6,000,000)
Sales	80,000,000	1,000,000	90,000,000	1,000,000
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into level 3	1,000,000	1,000,000	1,000,000	1,000,000
Transfers (out of) level 3	0	0	0	0
Fair value, ending balance	92,000,000	8,000,000	92,000,000	8,000,000
Change in unrealized (gains)/losses related to financials instruments held	(1,000,000)	(1,000,000)	(1,000,000)	(1,000,000)
Beneficial interests issued by consolidated VIEs
Liabilities:
Fair value, beginning balance	0	1,000,000	1,000,000	39,000,000
Total realized/unrealized (gains)/losses	0	0	(1,000,000)	0
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	0	(38,000,000)
Transfers into level 3	0	0	0	0
Transfers (out of) level 3	0	0	0	0
Fair value, ending balance	0	1,000,000	0	1,000,000
Change in unrealized (gains)/losses related to financials instruments held	0	0	0	0
Long-term debt
Liabilities:
Fair value, beginning balance	21,655,000,000	16,950,000,000	19,418,000,000	16,125,000,000
Total realized/unrealized (gains)/losses	455,000,000	(344,000,000)	1,728,000,000	(590,000,000)
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	2,648,000,000	3,150,000,000	4,699,000,000	6,241,000,000
Settlements	(2,729,000,000)	(2,123,000,000)	(3,917,000,000)	(4,386,000,000)
Transfers into level 3	200,000,000	219,000,000	473,000,000	594,000,000
Transfers (out of) level 3	(366,000,000)	(220,000,000)	(538,000,000)	(352,000,000)
Fair value, ending balance	21,863,000,000	17,632,000,000	21,863,000,000	17,632,000,000
Change in unrealized (gains)/losses related to financials instruments held	621,000,000	(427,000,000)	2,039,000,000	(706,000,000)
Debit valuation adjustment for fair value option financial liabilities
Level 3 Rollforward Supplemental Data [Abstract]
Unrealized (gains)/losses on liabilities recorded in OCI	(5,000,000)	(71,000,000)	170,000,000	(123,000,000)
Interest rate
Net derivative receivables:
Fair value, beginning balance	(147,000,000)	472,000,000	(38,000,000)	264,000,000
Total realized/unrealized gains/(losses)	(341,000,000)	287,000,000	(663,000,000)	340,000,000
Purchases	28,000,000	38,000,000	47,000,000	55,000,000
Sales	(60,000,000)	(51,000,000)	(207,000,000)	(55,000,000)
Settlements	(57,000,000)	(179,000,000)	241,000,000	(133,000,000)
Transfers into level 3	(6,000,000)	(54,000,000)	12,000,000	(28,000,000)
Transfers (out of) level 3	39,000,000	(24,000,000)	64,000,000	46,000,000
Fair value, ending balance	(544,000,000)	489,000,000	(544,000,000)	489,000,000
Change in unrealized gains/(losses) related to financial instruments held	(459,000,000)	254,000,000	(725,000,000)	314,000,000
Credit
Net derivative receivables:
Fair value, beginning balance	(115,000,000)	5,000,000	(107,000,000)	(35,000,000)
Total realized/unrealized gains/(losses)	(127,000,000)	21,000,000	(144,000,000)	38,000,000
Purchases	13,000,000	1,000,000	13,000,000	2,000,000
Sales	(1,000,000)	(5,000,000)	(2,000,000)	(7,000,000)
Settlements	4,000,000	(29,000,000)	10,000,000	(25,000,000)
Transfers into level 3	1,000,000	(4,000,000)	4,000,000	(1,000,000)
Transfers (out of) level 3	(7,000,000)	(13,000,000)	(6,000,000)	4,000,000
Fair value, ending balance	(232,000,000)	(24,000,000)	(232,000,000)	(24,000,000)
Change in unrealized gains/(losses) related to financial instruments held	(139,000,000)	9,000,000	(155,000,000)	11,000,000
Foreign exchange
Net derivative receivables:
Fair value, beginning balance	(356,000,000)	(288,000,000)	(297,000,000)	(396,000,000)
Total realized/unrealized gains/(losses)	58,000,000	94,000,000	(187,000,000)	240,000,000
Purchases	10,000,000	13,000,000	11,000,000	13,000,000
Sales	(8,000,000)	(3,000,000)	(17,000,000)	(8,000,000)
Settlements	114,000,000	(8,000,000)	295,000,000	3,000,000
Transfers into level 3	(17,000,000)	(74,000,000)	(25,000,000)	(112,000,000)
Transfers (out of) level 3	6,000,000	21,000,000	27,000,000	15,000,000
Fair value, ending balance	(193,000,000)	(245,000,000)	(193,000,000)	(245,000,000)
Change in unrealized gains/(losses) related to financial instruments held	82,000,000	95,000,000	(144,000,000)	190,000,000
Equity
Net derivative receivables:
Fair value, beginning balance	(2,066,000,000)	(2,512,000,000)	(2,225,000,000)	(3,409,000,000)
Total realized/unrealized gains/(losses)	(21,000,000)	143,000,000	710,000,000	782,000,000
Purchases	34,000,000	606,000,000	161,000,000	824,000,000
Sales	(158,000,000)	(1,042,000,000)	(455,000,000)	(1,284,000,000)
Settlements	(284,000,000)	(13,000,000)	(685,000,000)	421,000,000
Transfers into level 3	(148,000,000)	38,000,000	(215,000,000)	(73,000,000)
Transfers (out of) level 3	83,000,000	202,000,000	149,000,000	161,000,000
Fair value, ending balance	(2,560,000,000)	(2,578,000,000)	(2,560,000,000)	(2,578,000,000)
Change in unrealized gains/(losses) related to financial instruments held	(91,000,000)	(24,000,000)	(134,000,000)	514,000,000
Commodity
Net derivative receivables:
Fair value, beginning balance	(665,000,000)	(519,000,000)	(1,129,000,000)	(674,000,000)
Total realized/unrealized gains/(losses)	(171,000,000)	(35,000,000)	362,000,000	150,000,000
Purchases	7,000,000	0	10,000,000	0
Sales	(83,000,000)	0	(171,000,000)	0
Settlements	21,000,000	(186,000,000)	45,000,000	(174,000,000)
Transfers into level 3	(17,000,000)	(9,000,000)	(16,000,000)	(8,000,000)
Transfers (out of) level 3	0	(3,000,000)	(9,000,000)	(46,000,000)
Fair value, ending balance	(908,000,000)	(752,000,000)	(908,000,000)	(752,000,000)
Change in unrealized gains/(losses) related to financial instruments held	(151,000,000)	(65,000,000)	485,000,000	154,000,000
Total mortgage-backed securities
Assets:
Fair value, beginning balance	514,000,000	577,000,000	624,000,000	378,000,000
Total realized/unrealized gains/(losses)	(24,000,000)	4,000,000	(13,000,000)	6,000,000
Purchases	333,000,000	51,000,000	420,000,000	386,000,000
Sales	(82,000,000)	(23,000,000)	(270,000,000)	(119,000,000)
Settlements	(51,000,000)	(32,000,000)	(72,000,000)	(55,000,000)
Transfers into level 3	0	33,000,000	31,000,000	70,000,000
Transfers (out of) level 3	(22,000,000)	(27,000,000)	(52,000,000)	(83,000,000)
Fair value, ending balance	668,000,000	583,000,000	668,000,000	583,000,000
Change in unrealized gains/(losses) related to financial instruments held	(25,000,000)	2,000,000	(37,000,000)	0
Mortgage-backed securities, U.S. government agencies
Assets:
Fair value, beginning balance	412,000,000	508,000,000	549,000,000	307,000,000
Total realized/unrealized gains/(losses)	(25,000,000)	0	(40,000,000)	3,000,000
Purchases	318,000,000	5,000,000	323,000,000	334,000,000
Sales	(68,000,000)	(11,000,000)	(168,000,000)	(98,000,000)
Settlements	(20,000,000)	(19,000,000)	(38,000,000)	(39,000,000)
Transfers into level 3	0	5,000,000	1,000,000	9,000,000
Transfers (out of) level 3	0	(10,000,000)	(10,000,000)	(38,000,000)
Fair value, ending balance	617,000,000	478,000,000	617,000,000	478,000,000
Change in unrealized gains/(losses) related to financial instruments held	(24,000,000)	0	(37,000,000)	1,000,000
Mortgage-backed securities, Residential - nonagency
Assets:
Fair value, beginning balance	85,000,000	55,000,000	64,000,000	60,000,000
Total realized/unrealized gains/(losses)	1,000,000	2,000,000	25,000,000	0
Purchases	11,000,000	45,000,000	81,000,000	45,000,000
Sales	(14,000,000)	(11,000,000)	(83,000,000)	(13,000,000)
Settlements	(19,000,000)	(1,000,000)	(20,000,000)	(3,000,000)
Transfers into level 3	0	11,000,000	15,000,000	40,000,000
Transfers (out of) level 3	(22,000,000)	(14,000,000)	(40,000,000)	(42,000,000)
Fair value, ending balance	42,000,000	87,000,000	42,000,000	87,000,000
Change in unrealized gains/(losses) related to financial instruments held	0	1,000,000	0	1,000,000
Mortgage-backed securities, Commercial - nonagency
Assets:
Fair value, beginning balance	17,000,000	14,000,000	11,000,000	11,000,000
Total realized/unrealized gains/(losses)	0	2,000,000	2,000,000	3,000,000
Purchases	4,000,000	1,000,000	16,000,000	7,000,000
Sales	0	(1,000,000)	(19,000,000)	(8,000,000)
Settlements	(12,000,000)	(12,000,000)	(14,000,000)	(13,000,000)
Transfers into level 3	0	17,000,000	15,000,000	21,000,000
Transfers (out of) level 3	0	(3,000,000)	(2,000,000)	(3,000,000)
Fair value, ending balance	9,000,000	18,000,000	9,000,000	18,000,000
Change in unrealized gains/(losses) related to financial instruments held	(1,000,000)	1,000,000	0	(2,000,000)
Total debt and equity instruments
Assets:
Fair value, beginning balance	4,241,000,000	5,213,000,000	4,168,000,000	5,370,000,000
Total realized/unrealized gains/(losses)	50,000,000	(304,000,000)	178,000,000	(229,000,000)
Purchases	966,000,000	970,000,000	1,464,000,000	2,180,000,000
Sales	(525,000,000)	(1,054,000,000)	(1,067,000,000)	(2,099,000,000)
Settlements	(305,000,000)	(260,000,000)	(492,000,000)	(552,000,000)
Transfers into level 3	220,000,000	322,000,000	536,000,000	646,000,000
Transfers (out of) level 3	(278,000,000)	(344,000,000)	(418,000,000)	(773,000,000)
Fair value, ending balance	4,369,000,000	4,543,000,000	4,369,000,000	4,543,000,000
Change in unrealized gains/(losses) related to financial instruments held	90,000,000	(308,000,000)	177,000,000	(295,000,000)
Total debt instruments
Assets:
Fair value, beginning balance	3,735,000,000	4,215,000,000	3,635,000,000	4,385,000,000
Total realized/unrealized gains/(losses)	42,000,000	(37,000,000)	168,000,000	31,000,000
Purchases	955,000,000	889,000,000	1,426,000,000	2,053,000,000
Sales	(522,000,000)	(970,000,000)	(984,000,000)	(1,999,000,000)
Settlements	(290,000,000)	(241,000,000)	(444,000,000)	(513,000,000)
Transfers into level 3	199,000,000	322,000,000	439,000,000	641,000,000
Transfers (out of) level 3	(208,000,000)	(329,000,000)	(329,000,000)	(749,000,000)
Fair value, ending balance	3,911,000,000	3,849,000,000	3,911,000,000	3,849,000,000
Change in unrealized gains/(losses) related to financial instruments held	67,000,000	(41,000,000)	143,000,000	(36,000,000)
U.S. Treasury and government agencies
Assets:
Fair value, beginning balance	0	0	0	1,000,000
Total realized/unrealized gains/(losses)	0	0	0	0
Purchases	0	0	0	0
Sales	0	0	0	0
Settlements	0	0	0	0
Transfers into level 3	0	0	0	0
Transfers (out of) level 3	0	0	0	(1,000,000)
Fair value, ending balance	0	0	0	0
Change in unrealized gains/(losses) related to financial instruments held	0	0	0	0
Obligations of U.S. states and municipalities
Assets:
Fair value, beginning balance	623,000,000	704,000,000	689,000,000	744,000,000
Total realized/unrealized gains/(losses)	1,000,000	(9,000,000)	14,000,000	(11,000,000)
Purchases	57,000,000	42,000,000	58,000,000	81,000,000
Sales	(1,000,000)	0	(75,000,000)	0
Settlements	0	(1,000,000)	(6,000,000)	(78,000,000)
Transfers into level 3	0	0	0	0
Transfers (out of) level 3	0	0	0	0
Fair value, ending balance	680,000,000	736,000,000	680,000,000	736,000,000
Change in unrealized gains/(losses) related to financial instruments held	0	(9,000,000)	15,000,000	(11,000,000)
Non-U.S. government debt securities
Assets:
Fair value, beginning balance	170,000,000	197,000,000	155,000,000	78,000,000
Total realized/unrealized gains/(losses)	0	(12,000,000)	(1,000,000)	(10,000,000)
Purchases	117,000,000	126,000,000	188,000,000	351,000,000
Sales	(103,000,000)	(92,000,000)	(157,000,000)	(184,000,000)
Settlements	0	0	0	0
Transfers into level 3	9,000,000	0	11,000,000	17,000,000
Transfers (out of) level 3	(3,000,000)	(36,000,000)	(6,000,000)	(69,000,000)
Fair value, ending balance	190,000,000	183,000,000	190,000,000	183,000,000
Change in unrealized gains/(losses) related to financial instruments held	0	(12,000,000)	2,000,000	(9,000,000)
Corporate debt securities
Assets:
Fair value, beginning balance	568,000,000	306,000,000	334,000,000	312,000,000
Total realized/unrealized gains/(losses)	7,000,000	(3,000,000)	29,000,000	(4,000,000)
Purchases	61,000,000	60,000,000	284,000,000	141,000,000
Sales	(62,000,000)	(40,000,000)	(69,000,000)	(140,000,000)
Settlements	(53,000,000)	(10,000,000)	(53,000,000)	(11,000,000)
Transfers into level 3	51,000,000	36,000,000	79,000,000	167,000,000
Transfers (out of) level 3	(10,000,000)	(75,000,000)	(42,000,000)	(191,000,000)
Fair value, ending balance	562,000,000	274,000,000	562,000,000	274,000,000
Change in unrealized gains/(losses) related to financial instruments held	22,000,000	4,000,000	35,000,000	3,000,000
Loans
Assets:
Fair value, beginning balance	1,741,000,000	2,368,000,000	1,706,000,000	2,719,000,000
Total realized/unrealized gains/(losses)	56,000,000	(21,000,000)	139,000,000	41,000,000
Purchases	385,000,000	565,000,000	457,000,000	1,035,000,000
Sales	(216,000,000)	(806,000,000)	(334,000,000)	(1,534,000,000)
Settlements	(156,000,000)	(192,000,000)	(276,000,000)	(329,000,000)
Transfers into level 3	139,000,000	251,000,000	298,000,000	374,000,000
Transfers (out of) level 3	(171,000,000)	(179,000,000)	(212,000,000)	(320,000,000)
Fair value, ending balance	1,778,000,000	1,986,000,000	1,778,000,000	1,986,000,000
Change in unrealized gains/(losses) related to financial instruments held	68,000,000	(30,000,000)	128,000,000	(24,000,000)
Asset-backed securities
Assets:
Fair value, beginning balance	119,000,000	63,000,000	127,000,000	153,000,000
Total realized/unrealized gains/(losses)	2,000,000	4,000,000	0	9,000,000
Purchases	2,000,000	45,000,000	19,000,000	59,000,000
Sales	(58,000,000)	(9,000,000)	(79,000,000)	(22,000,000)
Settlements	(30,000,000)	(6,000,000)	(37,000,000)	(40,000,000)
Transfers into level 3	0	2,000,000	20,000,000	13,000,000
Transfers (out of) level 3	(2,000,000)	(12,000,000)	(17,000,000)	(85,000,000)
Fair value, ending balance	33,000,000	87,000,000	33,000,000	87,000,000
Change in unrealized gains/(losses) related to financial instruments held	2,000,000	4,000,000	0	5,000,000
Equity securities
Assets:
Fair value, beginning balance	202,000,000	300,000,000	232,000,000	295,000,000
Total realized/unrealized gains/(losses)	(12,000,000)	(13,000,000)	(14,000,000)	(21,000,000)
Purchases	8,000,000	65,000,000	23,000,000	93,000,000
Sales	(3,000,000)	(50,000,000)	(82,000,000)	(60,000,000)
Settlements	0	(1,000,000)	(22,000,000)	(1,000,000)
Transfers into level 3	21,000,000	0	96,000,000	4,000,000
Transfers (out of) level 3	(69,000,000)	(13,000,000)	(86,000,000)	(22,000,000)
Fair value, ending balance	147,000,000	288,000,000	147,000,000	288,000,000
Change in unrealized gains/(losses) related to financial instruments held	(12,000,000)	(8,000,000)	(11,000,000)	(8,000,000)
Other
Assets:
Fair value, beginning balance	304,000,000	698,000,000	301,000,000	690,000,000
Total realized/unrealized gains/(losses)	20,000,000	(254,000,000)	24,000,000	(239,000,000)
Purchases	3,000,000	16,000,000	15,000,000	34,000,000
Sales	0	(34,000,000)	(1,000,000)	(40,000,000)
Settlements	(15,000,000)	(18,000,000)	(26,000,000)	(38,000,000)
Transfers into level 3	0	0	1,000,000	1,000,000
Transfers (out of) level 3	(1,000,000)	(2,000,000)	(3,000,000)	(2,000,000)
Fair value, ending balance	311,000,000	406,000,000	311,000,000	406,000,000
Change in unrealized gains/(losses) related to financial instruments held	35,000,000	(259,000,000)	45,000,000	(251,000,000)
Total available-for-sale securities
Assets:
Fair value, beginning balance	0	205,000,000	1,000,000	277,000,000
Total realized/unrealized gains/(losses)	0	0	0	1,000,000
Purchases	0	0	0	0
Sales	0	0	0	0
Settlements	0	(57,000,000)	(1,000,000)	(130,000,000)
Transfers into level 3	0	0	0	0
Transfers (out of) level 3	0	0	0	0
Fair value, ending balance	0	148,000,000	0	148,000,000
Change in unrealized gains/(losses) related to financial instruments held	0	0	0	1,000,000
Level 3 Rollforward Supplemental Data [Abstract]
Realized gains/(losses) recorded in income	0	0	0	0
Unrealized gains/(losses) recorded in OCI	0	0	0	1,000,000
Mortgage-backed securities
Assets:
Fair value, beginning balance	0	1,000,000	1,000,000	1,000,000
Total realized/unrealized gains/(losses)	0	0	0	0
Purchases	0	0	0	0
Sales	0	0	0	0
Settlements	0	0	(1,000,000)	0
Transfers into level 3	0	0	0	0
Transfers (out of) level 3	0	0	0	0
Fair value, ending balance	0	1,000,000	0	1,000,000
Change in unrealized gains/(losses) related to financial instruments held	0	0	0	0
Asset-backed securities
Assets:
Fair value, beginning balance	0	204,000,000	0	276,000,000
Total realized/unrealized gains/(losses)	0	0	0	1,000,000
Purchases	0	0	0	0
Sales	0	0	0	0
Settlements	0	(57,000,000)	0	(130,000,000)
Transfers into level 3	0	0	0	0
Transfers (out of) level 3	0	0	0	0
Fair value, ending balance	0	147,000,000	0	147,000,000
Change in unrealized gains/(losses) related to financial instruments held	0	0	0	1,000,000
Loans
Assets:
Fair value, beginning balance	123,000,000	396,000,000	122,000,000	276,000,000
Total realized/unrealized gains/(losses)	1,000,000	(9,000,000)	4,000,000	(4,000,000)
Purchases	0	0	0	122,000,000
Sales	0	0	0	0
Settlements	(119,000,000)	(154,000,000)	(121,000,000)	(161,000,000)
Transfers into level 3	0	0	0	0
Transfers (out of) level 3	0	(74,000,000)	0	(74,000,000)
Fair value, ending balance	5,000,000	159,000,000	5,000,000	159,000,000
Change in unrealized gains/(losses) related to financial instruments held	0	(9,000,000)	5,000,000	(5,000,000)
Mortgage servicing rights
Assets:
Fair value, beginning balance	5,957,000,000	6,202,000,000	6,130,000,000	6,030,000,000
Total realized/unrealized gains/(losses)	(826,000,000)	94,000,000	(1,125,000,000)	478,000,000
Purchases	426,000,000	236,000,000	862,000,000	479,000,000
Sales	(217,000,000)	(104,000,000)	(328,000,000)	(399,000,000)
Settlements	(247,000,000)	(187,000,000)	(446,000,000)	(347,000,000)
Transfers into level 3	0	0	0	0
Transfers (out of) level 3	0	0	0	0
Fair value, ending balance	5,093,000,000	6,241,000,000	5,093,000,000	6,241,000,000
Change in unrealized gains/(losses) related to financial instruments held	(826,000,000)	94,000,000	(1,125,000,000)	478,000,000
Other assets
Assets:
Fair value, beginning balance	841,000,000	1,220,000,000	927,000,000	1,265,000,000
Total realized/unrealized gains/(losses)	(89,000,000)	(13,000,000)	(96,000,000)	(50,000,000)
Purchases	142,000,000	24,000,000	151,000,000	47,000,000
Sales	(8,000,000)	(2,000,000)	(88,000,000)	(16,000,000)
Settlements	(26,000,000)	(5,000,000)	(27,000,000)	(21,000,000)
Transfers into level 3	1,000,000	1,000,000	1,000,000	1,000,000
Transfers (out of) level 3	0	0	(7,000,000)	(1,000,000)
Fair value, ending balance	861,000,000	1,225,000,000	861,000,000	1,225,000,000
Change in unrealized gains/(losses) related to financial instruments held	$ (92,000,000)	$ (17,000,000)	$ (98,000,000)	$ (52,000,000)