CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 161	$ 137	$ 452	$ 669
Net change in unrealized gains (losses), net of tax:
Investment securities	(611)	(86)	(2,228)	(664)
Fair value option liabilities attributable to our own credit spread	24	9	104	9
Derivatives designated as cash flow hedges	(80)	(7)	(294)	(28)
Pension and post-retirement benefit plans	0	0	0	1
Total other comprehensive income (loss)	(667)	(84)	(2,418)	(682)
Comprehensive income (loss)	$ (506)	$ 53	$ (1,966)	$ (13)