CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 825	$ 393	$ 548
Net change in unrealized gains (losses), net of tax:
Investment securities	2	536	(2,205)
Fair value option liabilities attributable to our own credit spread	(55)	(25)	59
Derivatives designated as cash flow hedges	208	136	(258)
Pension and post-retirement benefit plans	(1)	2	8
Total other comprehensive income (loss)	154	649	(2,396)
Comprehensive income (loss)	$ 979	$ 1,042	$ (1,848)