Fair Value Disclosures - Assets and Liabilities on Our Consolidated Balance Sheets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Liabilities, Total [Member]
Liabilities:
Beginning Balance	$ 241	$ 496	$ 485
Included in Earnings	(85)	29	(27)
Included in Other Comprehensive Income	0	0	0
Purchases	0	13	(3)
Issues	30	69	98
Sales	0	0	0
Settlements, Net	(30)	(41)	(57)
Transfers into Level 3	17	0	0
Transfers out of Level 3	(18)	(325)	0
Ending Balance	155	241	496
Unrealized (Gains) Losses Still Held - Liabilities	(86)	(6)	(51)
Unrealized (Gains) Losses Still Held - Liabilities, OCI	0	0	0
Investments in securities
Assets:
Beginning Balance	3,610	3,449	3,625
Included in Earnings	(222)	(435)	(538)
Included in Other Comprehensive Income	14	(3)	(5)
Purchases	663	816	634
Issues	0	0	0
Sales	(381)	0	0
Settlements, net	(198)	(207)	(225)
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	(10)	(42)
Ending Balance	3,486	3,610	3,449
Unrealized Gains (Losses) Still Held - Assets	208	54	112
Unrealized Gains (Losses) Still Held - Assets, OCI	12	(2)	(4)
Mortgage loans held-for-sale
Assets:
Beginning Balance	1,295	896	310
Included in Earnings	3	(20)	6
Included in Other Comprehensive Income	0	0	0
Purchases	32	2,156	2,038
Issues	0	0	0
Sales	0	(1,557)	(1,152)
Settlements, net	0	(1)	(24)
Transfers into Level 3	0	35	12
Transfers out of Level 3	(1,330)	(214)	(294)
Ending Balance	0	1,295	896
Unrealized Gains (Losses) Still Held - Assets	0	(35)	32
Unrealized Gains (Losses) Still Held - Assets, OCI	0	0	0
Mortgage loans held-for-investment
Assets:
Beginning Balance	841	473	110
Included in Earnings	(80)	(42)	(81)
Included in Other Comprehensive Income	0	0	0
Purchases	0	0	0
Issues	0	0	0
Sales	0	0	0
Settlements, net	(119)	(241)	(15)
Transfers into Level 3	1,022	688	530
Transfers out of Level 3	(246)	(37)	(71)
Ending Balance	1,418	841	473
Unrealized Gains (Losses) Still Held - Assets	(100)	(43)	(84)
Unrealized Gains (Losses) Still Held - Assets, OCI	0	0	0
Other Assets
Assets:
Beginning Balance	5,439	5,519	5,573
Included in Earnings	242	181	138
Included in Other Comprehensive Income	0	0	0
Purchases	(25)	(14)	(20)
Issues	381	628	736
Sales	(14)	(14)	(3)
Settlements, net	(994)	(861)	(905)
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Ending Balance	5,029	5,439	5,519
Unrealized Gains (Losses) Still Held - Assets	242	172	137
Unrealized Gains (Losses) Still Held - Assets, OCI	$ 0	$ 0	$ 0