Fair Value Measurement - Changes in Level 3 Recurring Measurements (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Net derivative receivables:
Fair value, beginning balance	$ (3,110,000,000)	$ (2,521,000,000)	$ (4,250,000,000)	$ (2,360,000,000)
Total realized/unrealized gains/(losses)	385,000,000	45,000,000	1,935,000,000	132,000,000
Purchases	701,000,000	380,000,000	1,595,000,000	907,000,000
Sales	(664,000,000)	(210,000,000)	(2,018,000,000)	(398,000,000)
Settlements	406,000,000	(251,000,000)	498,000,000	(902,000,000)
Transfers into level 3	(164,000,000)	19,000,000	(386,000,000)	(84,000,000)
Transfers (out of) level 3	60,000,000	152,000,000	240,000,000	319,000,000
Fair value, ending balance	(2,386,000,000)	(2,386,000,000)	(2,386,000,000)	(2,386,000,000)
Change in unrealized gains/(losses) related to financial instruments held	$ 164,000,000	39,000,000	$ 736,000,000	(150,000,000)
Level 3 Rollforward Supplemental Data [Abstract]
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	$ 4,305,000,000	2,131,000,000	$ 4,142,000,000	2,117,000,000
Total realized/unrealized (gains)/losses	(84,000,000)	33,000,000	(125,000,000)	39,000,000
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	517,000,000	1,909,000,000	1,272,000,000	2,510,000,000
Settlements	(170,000,000)	(58,000,000)	(425,000,000)	(169,000,000)
Transfers into level 3	1,000,000	0	2,000,000	0
Transfers (out of) level 3	(129,000,000)	(177,000,000)	(426,000,000)	(659,000,000)
Fair value, ending balance	4,440,000,000	3,838,000,000	4,440,000,000	3,838,000,000
Change in unrealized (gains)/losses related to financials instruments held	(82,000,000)	27,000,000	(115,000,000)	140,000,000
Federal funds purchased and securities loaned or sold under repurchase agreements
Liabilities:
Fair value, beginning balance		0		0
Total realized/unrealized (gains)/losses		0		0
Purchases		0		0
Sales		0		0
Issuances		0		0
Settlements		0		0
Transfers into level 3		1,000,000		1,000,000
Transfers (out of) level 3		0		0
Fair value, ending balance		1,000,000		1,000,000
Change in unrealized (gains)/losses related to financials instruments held		0		0
Short-term borrowings
Liabilities:
Fair value, beginning balance	2,209,000,000	1,314,000,000	1,665,000,000	1,134,000,000
Total realized/unrealized (gains)/losses	(47,000,000)	33,000,000	(229,000,000)	80,000,000
Purchases	0	0	0	0
Sales	0	0	0
Issuances	713,000,000	818,000,000	2,783,000,000	2,208,000,000
Settlements	(885,000,000)	(631,000,000)	(2,245,000,000)	(1,873,000,000)
Transfers into level 3	6,000,000	13,000,000	61,000,000	53,000,000
Transfers (out of) level 3	(25,000,000)	(76,000,000)	(64,000,000)	(131,000,000)
Fair value, ending balance	1,971,000,000	1,471,000,000	1,971,000,000	1,471,000,000
Change in unrealized (gains)/losses related to financials instruments held	(31,000,000)	21,000,000	26,000,000	50,000,000
Total debt and equity instruments
Liabilities:
Fair value, beginning balance	43,000,000	36,000,000	39,000,000	43,000,000
Total realized/unrealized (gains)/losses	36,000,000	2,000,000	28,000,000	1,000,000
Purchases	(6,000,000)	(23,000,000)	(68,000,000)	(31,000,000)
Sales	19,000,000	28,000,000	95,000,000	32,000,000
Issuances	0	0	0	0
Settlements	(2,000,000)	0	(1,000,000)	1,000,000
Transfers into level 3	7,000,000	0	9,000,000	3,000,000
Transfers (out of) level 3	(1,000,000)	0	(6,000,000)	(6,000,000)
Fair value, ending balance	96,000,000	43,000,000	96,000,000	43,000,000
Change in unrealized (gains)/losses related to financials instruments held	36,000,000	3,000,000	11,000,000	1,000,000
Accounts payable and other liabilities
Liabilities:
Fair value, beginning balance	8,000,000	10,000,000	13,000,000	13,000,000
Total realized/unrealized (gains)/losses	1,000,000	0	0	0
Purchases	0	0	(6,000,000)	(1,000,000)
Sales	0	0	1,000,000	0
Issuances	0	0	0	0
Settlements	0	(1,000,000)	0	(3,000,000)
Transfers into level 3	3,000,000	0	4,000,000	0
Transfers (out of) level 3	0	0	0	0
Fair value, ending balance	12,000,000	9,000,000	12,000,000	9,000,000
Change in unrealized (gains)/losses related to financials instruments held	1,000,000	0	0	0
Beneficial interests issued by consolidated VIEs
Liabilities:
Fair value, beginning balance	1,000,000	1,000,000	39,000,000	48,000,000
Total realized/unrealized (gains)/losses	0	0	0	3,000,000
Purchases	0	0	0	(44,000,000)
Sales	0	39,000,000	0	39,000,000
Issuances	0	0	0	0
Settlements	0	0	(38,000,000)	(6,000,000)
Transfers into level 3	0	78,000,000	0	78,000,000
Transfers (out of) level 3	0	0	0	0
Fair value, ending balance	1,000,000	118,000,000	1,000,000	118,000,000
Change in unrealized (gains)/losses related to financials instruments held	0	0	0	0
Long-term debt
Liabilities:
Fair value, beginning balance	18,262,000,000	14,732,000,000	16,125,000,000	12,850,000,000
Total realized/unrealized (gains)/losses	194,000,000	319,000,000	(396,000,000)	918,000,000
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	3,551,000,000	3,023,000,000	10,382,000,000	9,756,000,000
Settlements	(1,809,000,000)	(3,552,000,000)	(6,155,000,000)	(8,637,000,000)
Transfers into level 3	59,000,000	181,000,000	653,000,000	269,000,000
Transfers (out of) level 3	(219,000,000)	(209,000,000)	(571,000,000)	(662,000,000)
Fair value, ending balance	20,038,000,000	14,494,000,000	20,038,000,000	14,494,000,000
Change in unrealized (gains)/losses related to financials instruments held	192,000,000	242,000,000	(576,000,000)	996,000,000
Debit valuation adjustment for fair value option financial liabilities
Level 3 Rollforward Supplemental Data [Abstract]
Unrealized (gains)/losses on liabilities recorded in OCI	123,000,000
Interest rate
Net derivative receivables:
Fair value, beginning balance	489,000,000	712,000,000	264,000,000	1,263,000,000
Total realized/unrealized gains/(losses)	236,000,000	101,000,000	576,000,000	182,000,000
Purchases	28,000,000	16,000,000	83,000,000	53,000,000
Sales	(22,000,000)	(23,000,000)	(77,000,000)	(76,000,000)
Settlements	(101,000,000)	(182,000,000)	(234,000,000)	(833,000,000)
Transfers into level 3	68,000,000	21,000,000	40,000,000	55,000,000
Transfers (out of) level 3	(7,000,000)	19,000,000	39,000,000	20,000,000
Fair value, ending balance	691,000,000	664,000,000	691,000,000	664,000,000
Change in unrealized gains/(losses) related to financial instruments held	216,000,000	(7,000,000)	498,000,000	(184,000,000)
Credit
Net derivative receivables:
Fair value, beginning balance	(24,000,000)	(45,000,000)	(35,000,000)	98,000,000
Total realized/unrealized gains/(losses)	(19,000,000)	(32,000,000)	19,000,000	(126,000,000)
Purchases	1,000,000	0	3,000,000	1,000,000
Sales	0	(1,000,000)	(7,000,000)	(4,000,000)
Settlements	47,000,000	(2,000,000)	22,000,000	(64,000,000)
Transfers into level 3	6,000,000	40,000,000	5,000,000	57,000,000
Transfers (out of) level 3	16,000,000	4,000,000	20,000,000	2,000,000
Fair value, ending balance	27,000,000	(36,000,000)	27,000,000	(36,000,000)
Change in unrealized gains/(losses) related to financial instruments held	(15,000,000)	(22,000,000)	7,000,000	(57,000,000)
Foreign exchange
Net derivative receivables:
Fair value, beginning balance	(245,000,000)	(686,000,000)	(396,000,000)	(1,384,000,000)
Total realized/unrealized gains/(losses)	(56,000,000)	16,000,000	184,000,000	86,000,000
Purchases	29,000,000	9,000,000	42,000,000	13,000,000
Sales	(7,000,000)	(2,000,000)	(15,000,000)	(6,000,000)
Settlements	(49,000,000)	68,000,000	(46,000,000)	633,000,000
Transfers into level 3	(2,000,000)	(39,000,000)	(114,000,000)	(16,000,000)
Transfers (out of) level 3	28,000,000	95,000,000	43,000,000	135,000,000
Fair value, ending balance	(302,000,000)	(539,000,000)	(302,000,000)	(539,000,000)
Change in unrealized gains/(losses) related to financial instruments held	(54,000,000)	37,000,000	42,000,000	(12,000,000)
Equity
Net derivative receivables:
Fair value, beginning balance	(2,578,000,000)	(2,444,000,000)	(3,409,000,000)	(2,252,000,000)
Total realized/unrealized gains/(losses)	(94,000,000)	(10,000,000)	688,000,000	24,000,000
Purchases	643,000,000	355,000,000	1,467,000,000	840,000,000
Sales	(635,000,000)	(184,000,000)	(1,919,000,000)	(312,000,000)
Settlements	622,000,000	(132,000,000)	1,043,000,000	(660,000,000)
Transfers into level 3	(251,000,000)	(1,000,000)	(324,000,000)	(182,000,000)
Transfers (out of) level 3	16,000,000	41,000,000	177,000,000	167,000,000
Fair value, ending balance	(2,277,000,000)	(2,375,000,000)	(2,277,000,000)	(2,375,000,000)
Change in unrealized gains/(losses) related to financial instruments held	(121,000,000)	82,000,000	31,000,000	76,000,000
Commodity
Net derivative receivables:
Fair value, beginning balance	(752,000,000)	(58,000,000)	(674,000,000)	(85,000,000)
Total realized/unrealized gains/(losses)	318,000,000	(30,000,000)	468,000,000	(34,000,000)
Purchases	0	0	0	0
Sales	0	0	0	0
Settlements	(113,000,000)	(3,000,000)	(287,000,000)	22,000,000
Transfers into level 3	15,000,000	(2,000,000)	7,000,000	2,000,000
Transfers (out of) level 3	7,000,000	(7,000,000)	(39,000,000)	(5,000,000)
Fair value, ending balance	(525,000,000)	(100,000,000)	(525,000,000)	(100,000,000)
Change in unrealized gains/(losses) related to financial instruments held	138,000,000	(51,000,000)	158,000,000	27,000,000
Total mortgage-backed securities
Assets:
Fair value, beginning balance	583,000,000	528,000,000	378,000,000	492,000,000
Total realized/unrealized gains/(losses)	2,000,000	7,000,000	8,000,000	10,000,000
Purchases	14,000,000	14,000,000	400,000,000	228,000,000
Sales	(34,000,000)	(43,000,000)	(153,000,000)	(228,000,000)
Settlements	(20,000,000)	(32,000,000)	(75,000,000)	(81,000,000)
Transfers into level 3	110,000,000	63,000,000	180,000,000	211,000,000
Transfers (out of) level 3	(36,000,000)	(80,000,000)	(119,000,000)	(175,000,000)
Fair value, ending balance	619,000,000	457,000,000	619,000,000	457,000,000
Change in unrealized gains/(losses) related to financial instruments held	0	6,000,000	6,000,000	(14,000,000)
Mortgage-backed securities, U.S. government agencies
Assets:
Fair value, beginning balance	478,000,000	365,000,000	307,000,000	392,000,000
Total realized/unrealized gains/(losses)	2,000,000	(2,000,000)	5,000,000	(9,000,000)
Purchases	14,000,000	0	348,000,000	161,000,000
Sales	(28,000,000)	(15,000,000)	(126,000,000)	(166,000,000)
Settlements	(17,000,000)	(20,000,000)	(56,000,000)	(55,000,000)
Transfers into level 3	83,000,000	10,000,000	92,000,000	37,000,000
Transfers (out of) level 3	(3,000,000)	(15,000,000)	(41,000,000)	(37,000,000)
Fair value, ending balance	529,000,000	323,000,000	529,000,000	323,000,000
Change in unrealized gains/(losses) related to financial instruments held	0	(2,000,000)	3,000,000	(17,000,000)
Mortgage-backed securities, Residential - nonagency
Assets:
Fair value, beginning balance	87,000,000	98,000,000	60,000,000	83,000,000
Total realized/unrealized gains/(losses)	1,000,000	6,000,000	1,000,000	14,000,000
Purchases	0	4,000,000	45,000,000	40,000,000
Sales	(6,000,000)	(4,000,000)	(19,000,000)	(24,000,000)
Settlements	(3,000,000)	(12,000,000)	(6,000,000)	(21,000,000)
Transfers into level 3	18,000,000	50,000,000	58,000,000	111,000,000
Transfers (out of) level 3	(20,000,000)	(35,000,000)	(62,000,000)	(96,000,000)
Fair value, ending balance	77,000,000	107,000,000	77,000,000	107,000,000
Change in unrealized gains/(losses) related to financial instruments held	1,000,000	5,000,000	4,000,000	2,000,000
Mortgage-backed securities, Commercial - nonagency
Assets:
Fair value, beginning balance	18,000,000	65,000,000	11,000,000	17,000,000
Total realized/unrealized gains/(losses)	(1,000,000)	3,000,000	2,000,000	5,000,000
Purchases	0	10,000,000	7,000,000	27,000,000
Sales	0	(24,000,000)	(8,000,000)	(38,000,000)
Settlements	0	0	(13,000,000)	(5,000,000)
Transfers into level 3	9,000,000	3,000,000	30,000,000	63,000,000
Transfers (out of) level 3	(13,000,000)	(30,000,000)	(16,000,000)	(42,000,000)
Fair value, ending balance	13,000,000	27,000,000	13,000,000	27,000,000
Change in unrealized gains/(losses) related to financial instruments held	(1,000,000)	3,000,000	(1,000,000)	1,000,000
Total debt and equity instruments
Assets:
Fair value, beginning balance	4,543,000,000	7,293,000,000	5,370,000,000	7,894,000,000
Total realized/unrealized gains/(losses)	72,000,000	179,000,000	(157,000,000)	489,000,000
Purchases	452,000,000	1,258,000,000	2,632,000,000	3,973,000,000
Sales	(421,000,000)	(2,173,000,000)	(2,520,000,000)	(4,041,000,000)
Settlements	(276,000,000)	(508,000,000)	(828,000,000)	(1,851,000,000)
Transfers into level 3	330,000,000	453,000,000	976,000,000	1,032,000,000
Transfers (out of) level 3	(472,000,000)	(431,000,000)	(1,245,000,000)	(1,425,000,000)
Fair value, ending balance	4,228,000,000	6,071,000,000	4,228,000,000	6,071,000,000
Change in unrealized gains/(losses) related to financial instruments held	(7,000,000)	115,000,000	(269,000,000)	167,000,000
Total debt instruments
Assets:
Fair value, beginning balance	3,849,000,000	6,278,000,000	4,385,000,000	6,902,000,000
Total realized/unrealized gains/(losses)	22,000,000	153,000,000	53,000,000	364,000,000
Purchases	433,000,000	1,224,000,000	2,486,000,000	3,804,000,000
Sales	(373,000,000)	(2,095,000,000)	(2,372,000,000)	(3,909,000,000)
Settlements	(239,000,000)	(483,000,000)	(752,000,000)	(1,714,000,000)
Transfers into level 3	246,000,000	437,000,000	887,000,000	1,004,000,000
Transfers (out of) level 3	(452,000,000)	(422,000,000)	(1,201,000,000)	(1,359,000,000)
Fair value, ending balance	3,486,000,000	5,092,000,000	3,486,000,000	5,092,000,000
Change in unrealized gains/(losses) related to financial instruments held	1,000,000	92,000,000	(30,000,000)	87,000,000
U.S. Treasury and government agencies
Assets:
Fair value, beginning balance	0	0	1,000,000	0
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	1,000,000	0	1,000,000
Transfers (out of) level 3	0	0	(1,000,000)	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
Obligations of U.S. states and municipalities
Assets:
Fair value, beginning balance	736,000,000	681,000,000	744,000,000	649,000,000
Total realized/unrealized gains/(losses)	8,000,000	3,000,000	(3,000,000)	15,000,000
Purchases	26,000,000	31,000,000	107,000,000	126,000,000
Sales	(70,000,000)	0	(70,000,000)	(70,000,000)
Settlements	(1,000,000)	0	(79,000,000)	(5,000,000)
Transfers into level 3	0	0	0	0
Transfers (out of) level 3	0	0	0	0
Fair value, ending balance	699,000,000	715,000,000	699,000,000	715,000,000
Change in unrealized gains/(losses) related to financial instruments held	7,000,000	3,000,000	(3,000,000)	15,000,000
Non-U.S. government debt securities
Assets:
Fair value, beginning balance	183,000,000	37,000,000	78,000,000	46,000,000
Total realized/unrealized gains/(losses)	(9,000,000)	0	(19,000,000)	3,000,000
Purchases	44,000,000	252,000,000	395,000,000	426,000,000
Sales	(29,000,000)	(217,000,000)	(213,000,000)	(395,000,000)
Settlements	(2,000,000)	0	(2,000,000)	0
Transfers into level 3	1,000,000	23,000,000	18,000,000	50,000,000
Transfers (out of) level 3	(24,000,000)	(15,000,000)	(93,000,000)	(50,000,000)
Fair value, ending balance	164,000,000	80,000,000	164,000,000	80,000,000
Change in unrealized gains/(losses) related to financial instruments held	(9,000,000)	0	(18,000,000)	0
Corporate debt securities
Assets:
Fair value, beginning balance	274,000,000	461,000,000	312,000,000	576,000,000
Total realized/unrealized gains/(losses)	(2,000,000)	7,000,000	(6,000,000)	0
Purchases	156,000,000	193,000,000	297,000,000	690,000,000
Sales	(87,000,000)	(327,000,000)	(227,000,000)	(473,000,000)
Settlements	(4,000,000)	(22,000,000)	(15,000,000)	(398,000,000)
Transfers into level 3	82,000,000	68,000,000	249,000,000	128,000,000
Transfers (out of) level 3	(24,000,000)	(19,000,000)	(215,000,000)	(162,000,000)
Fair value, ending balance	395,000,000	361,000,000	395,000,000	361,000,000
Change in unrealized gains/(losses) related to financial instruments held	(3,000,000)	8,000,000	(1,000,000)	11,000,000
Loans
Assets:
Fair value, beginning balance	1,986,000,000	4,488,000,000	2,719,000,000	4,837,000,000
Total realized/unrealized gains/(losses)	17,000,000	131,000,000	58,000,000	309,000,000
Purchases	188,000,000	564,000,000	1,223,000,000	2,055,000,000
Sales	(146,000,000)	(1,498,000,000)	(1,680,000,000)	(2,565,000,000)
Settlements	(199,000,000)	(421,000,000)	(528,000,000)	(1,186,000,000)
Transfers into level 3	48,000,000	246,000,000	422,000,000	564,000,000
Transfers (out of) level 3	(361,000,000)	(303,000,000)	(681,000,000)	(807,000,000)
Fair value, ending balance	1,533,000,000	3,207,000,000	1,533,000,000	3,207,000,000
Change in unrealized gains/(losses) related to financial instruments held	3,000,000	71,000,000	(22,000,000)	73,000,000
Asset-backed securities
Assets:
Fair value, beginning balance	87,000,000	83,000,000	153,000,000	302,000,000
Total realized/unrealized gains/(losses)	6,000,000	5,000,000	15,000,000	27,000,000
Purchases	5,000,000	170,000,000	64,000,000	279,000,000
Sales	(7,000,000)	(10,000,000)	(29,000,000)	(178,000,000)
Settlements	(13,000,000)	(8,000,000)	(53,000,000)	(44,000,000)
Transfers into level 3	5,000,000	36,000,000	18,000,000	50,000,000
Transfers (out of) level 3	(7,000,000)	(5,000,000)	(92,000,000)	(165,000,000)
Fair value, ending balance	76,000,000	271,000,000	76,000,000	271,000,000
Change in unrealized gains/(losses) related to financial instruments held	3,000,000	4,000,000	8,000,000	2,000,000
Equity securities
Assets:
Fair value, beginning balance	288,000,000	284,000,000	295,000,000	231,000,000
Total realized/unrealized gains/(losses)	20,000,000	6,000,000	(1,000,000)	40,000,000
Purchases	6,000,000	29,000,000	99,000,000	142,000,000
Sales	(48,000,000)	(40,000,000)	(108,000,000)	(87,000,000)
Settlements	0	0	(1,000,000)	0
Transfers into level 3	82,000,000	16,000,000	86,000,000	18,000,000
Transfers (out of) level 3	(19,000,000)	(7,000,000)	(41,000,000)	(56,000,000)
Fair value, ending balance	329,000,000	288,000,000	329,000,000	288,000,000
Change in unrealized gains/(losses) related to financial instruments held	(18,000,000)	7,000,000	11,000,000	34,000,000
Other
Assets:
Fair value, beginning balance	406,000,000	731,000,000	690,000,000	761,000,000
Total realized/unrealized gains/(losses)	30,000,000	20,000,000	(209,000,000)	85,000,000
Purchases	13,000,000	5,000,000	47,000,000	27,000,000
Sales	0	(38,000,000)	(40,000,000)	(45,000,000)
Settlements	(37,000,000)	(25,000,000)	(75,000,000)	(137,000,000)
Transfers into level 3	2,000,000	0	3,000,000	10,000,000
Transfers (out of) level 3	(1,000,000)	(2,000,000)	(3,000,000)	(10,000,000)
Fair value, ending balance	413,000,000	691,000,000	413,000,000	691,000,000
Change in unrealized gains/(losses) related to financial instruments held	10,000,000	16,000,000	(250,000,000)	46,000,000
Total available-for-sale securities
Assets:
Fair value, beginning balance	148,000,000	548,000,000	277,000,000	664,000,000
Total realized/unrealized gains/(losses)	0	2,000,000	1,000,000	14,000,000
Purchases	0	0	0	0
Sales	0	0	0	(50,000,000)
Settlements	(86,000,000)	(63,000,000)	(216,000,000)	(141,000,000)
Transfers into level 3	0	0	0	0
Transfers (out of) level 3	0	0	0	0
Fair value, ending balance	62,000,000	487,000,000	62,000,000	487,000,000
Change in unrealized gains/(losses) related to financial instruments held	0	2,000,000	1,000,000	12,000,000
Level 3 Rollforward Supplemental Data [Abstract]
Realized gains/(losses) recorded in income	0	0	0	0
Unrealized gains/(losses) recorded in OCI	0	2,000,000	1,000,000	14,000,000
Asset-backed securities
Assets:
Fair value, beginning balance	147,000,000	547,000,000	276,000,000	663,000,000
Total realized/unrealized gains/(losses)	0	2,000,000	1,000,000	14,000,000
Purchases	0	0	0	0
Sales	0	0	0	(50,000,000)
Settlements	(86,000,000)	(63,000,000)	(216,000,000)	(141,000,000)
Transfers into level 3	0	0	0	0
Transfers (out of) level 3	0	0	0	0
Fair value, ending balance	61,000,000	486,000,000	61,000,000	486,000,000
Change in unrealized gains/(losses) related to financial instruments held	0	2,000,000	1,000,000	12,000,000
Other
Assets:
Fair value, beginning balance	1,000,000	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	0	0
Transfers into level 3	0	0	0	0
Transfers (out of) level 3	0	0	0	0
Fair value, ending balance	1,000,000	1,000,000	1,000,000	1,000,000
Change in unrealized gains/(losses) related to financial instruments held	0	0	0	0
Loans
Assets:
Fair value, beginning balance	159,000,000	305,000,000	276,000,000	570,000,000
Total realized/unrealized gains/(losses)	(1,000,000)	8,000,000	(5,000,000)	32,000,000
Purchases	1,000,000	0	123,000,000	0
Sales	0	(26,000,000)	0	(26,000,000)
Settlements	(19,000,000)	(10,000,000)	(180,000,000)	(299,000,000)
Transfers into level 3	0	0	0	0
Transfers (out of) level 3	0	0	(74,000,000)	0
Fair value, ending balance	140,000,000	277,000,000	140,000,000	277,000,000
Change in unrealized gains/(losses) related to financial instruments held	(1,000,000)	8,000,000	(5,000,000)	8,000,000
Mortgage servicing rights
Assets:
Fair value, beginning balance	6,241,000,000	5,753,000,000	6,030,000,000	6,096,000,000
Total realized/unrealized gains/(losses)	98,000,000	(66,000,000)	576,000,000	(223,000,000)
Purchases	291,000,000	253,000,000	770,000,000	624,000,000
Sales	(2,000,000)	(2,000,000)	(401,000,000)	(140,000,000)
Settlements	(195,000,000)	(200,000,000)	(542,000,000)	(619,000,000)
Transfers into level 3	0	0	0	0
Transfers (out of) level 3	0	0	0	0
Fair value, ending balance	6,433,000,000	5,738,000,000	6,433,000,000	5,738,000,000
Change in unrealized gains/(losses) related to financial instruments held	98,000,000	(66,000,000)	576,000,000	(224,000,000)
Other assets
Assets:
Fair value, beginning balance	1,225,000,000	1,934,000,000	1,265,000,000	2,223,000,000
Total realized/unrealized gains/(losses)	(160,000,000)	18,000,000	(210,000,000)	248,000,000
Purchases	2,000,000	3,000,000	49,000,000	35,000,000
Sales	0	(2,000,000)	(16,000,000)	(157,000,000)
Settlements	(7,000,000)	(82,000,000)	(28,000,000)	(478,000,000)
Transfers into level 3	3,000,000	0	4,000,000	0
Transfers (out of) level 3	0	0	(1,000,000)	0
Fair value, ending balance	1,063,000,000	1,871,000,000	1,063,000,000	1,871,000,000
Change in unrealized gains/(losses) related to financial instruments held	$ (160,000,000)	$ 16,000,000	$ (217,000,000)	$ 126,000,000