Quarterly report [Sections 13 or 15(d)]

Securities - Debt Securities (Details)

Securities - Debt Securities (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2026	Dec. 31, 2025
Available-for-sale debt securities
Amortized Cost	$ 350,914	$ 388,611
Gross Unrealized Gains	621	790
Gross Unrealized Losses	(2,995)	(2,603)
Fair Value	348,540	386,798
Other Debt Securities, Carried at Fair Value:
Amortized Cost	14,928	16,066
Gross Unrealized Gains	121	200
Gross Unrealized Losses	(170)	(89)
Fair Value	14,879	16,177
Debt securities carried at fair value:
Amortized Cost	365,842	404,677
Gross Unrealized Gains	742	990
Gross Unrealized Losses	(3,165)	(2,692)
Fair Value	363,419	402,975
Held-to-maturity debt securities
Amortized Cost	505,828	522,685
Gross Unrealized Gains	1	2
Gross Unrealized Losses	(82,095)	(80,257)
Fair Value	423,734	442,430
Debt securities:
Amortized Cost	871,670	927,362
Gross Unrealized Gains	743	992
Gross Unrealized Losses	(85,260)	(82,949)
Fair Value	787,153	845,405
Securities, pledged as collateral	$ 101,900	$ 153,800
Stockholders' Equity, Total \| Investment Concentration Risk \| Fannie Mae
Debt securities:
Concentration risk (more than)	10.00%	10.00%
Stockholders' Equity, Total \| Investment Concentration Risk \| Freddie Mac
Debt securities:
Concentration risk (more than)	10.00%	10.00%
FNMA
Debt securities carried at fair value:
Amortized Cost	$ 240,500	$ 246,900
Fair Value	200,900	208,000
FHLMC
Debt securities carried at fair value:
Amortized Cost	156,600	158,500
Fair Value	131,500	133,600
Mortgage-backed securities
Available-for-sale debt securities
Amortized Cost	103,430	92,505
Gross Unrealized Gains	471	353
Gross Unrealized Losses	(1,803)	(1,752)
Fair Value	102,098	91,106
Debt securities carried at fair value:
Fair Value	102,275
Agency
Available-for-sale debt securities
Amortized Cost	41,870	34,240
Gross Unrealized Gains	125	80
Gross Unrealized Losses	(1,154)	(1,179)
Fair Value	40,841	33,141
Debt securities carried at fair value:
Fair Value	40,846
Held-to-maturity debt securities
Amortized Cost	379,169	395,415
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(68,332)	(67,309)
Fair Value	310,837	328,106
Agency-collateralized mortgage obligations
Available-for-sale debt securities
Amortized Cost	17,204	19,304
Gross Unrealized Gains	85	27
Gross Unrealized Losses	(141)	(132)
Fair Value	17,148	19,199
Debt securities carried at fair value:
Fair Value	17,148
Commercial
Available-for-sale debt securities
Amortized Cost	44,281	38,688
Gross Unrealized Gains	260	191
Gross Unrealized Losses	(484)	(385)
Fair Value	44,057	38,494
Debt securities carried at fair value:
Fair Value	44,069
Non-agency residential
Available-for-sale debt securities
Amortized Cost	75	273
Gross Unrealized Gains	1	55
Gross Unrealized Losses	(24)	(56)
Fair Value	52	$ 272
Debt securities carried at fair value:
Fair Value	$ 212
Non-agency residential \| Prime
Debt securities:
Available-for-sale securities, percent held by rating	10.00%	27.00%
Non-agency residential \| Subprime
Debt securities:
Available-for-sale securities, percent held by rating	90.00%	73.00%
U.S. Treasury and government agencies
Available-for-sale debt securities
Amortized Cost	$ 195,191	$ 250,065
Gross Unrealized Gains	128	390
Gross Unrealized Losses	(916)	(621)
Fair Value	194,403	249,834
Debt securities carried at fair value:
Fair Value	198,156
Held-to-maturity debt securities
Amortized Cost	121,262	121,242
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(13,011)	(12,225)
Fair Value	108,251	109,017
Non-U.S. securities
Available-for-sale debt securities
Amortized Cost	37,718	31,765
Gross Unrealized Gains	12	20
Gross Unrealized Losses	(63)	(18)
Fair Value	37,667	31,767
Debt securities carried at fair value:
Fair Value	48,613
Other taxable securities
Available-for-sale debt securities
Amortized Cost	7,399	6,328
Gross Unrealized Gains	2	12
Gross Unrealized Losses	(54)	(36)
Fair Value	7,347	6,304
Debt securities carried at fair value:
Fair Value	7,350
Held-to-maturity debt securities
Amortized Cost	5,397	6,028
Gross Unrealized Gains	1	2
Gross Unrealized Losses	(752)	(723)
Fair Value	4,646	5,307
Tax-exempt securities
Available-for-sale debt securities
Amortized Cost	7,176	7,948
Gross Unrealized Gains	8	15
Gross Unrealized Losses	(159)	(176)
Fair Value	7,025	$ 7,787
Debt securities carried at fair value:
Fair Value	$ 7,025