CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 90	$ 193	$ 291	$ 532
Net change in unrealized gains (losses), net of tax:
Investment securities	(574)	53	(1,617)	(578)
Fair value option liabilities attributable to our own credit spread	51	10	80	0
Derivatives designated as cash flow hedges	(62)	(9)	(214)	(21)
Pension and post-retirement benefit plans	0	1	0	1
Total other comprehensive income (loss)	(585)	55	(1,751)	(598)
Comprehensive income (loss)	$ (495)	$ 248	$ (1,460)	$ (66)