Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 1,714	$ 3,060	$ 1,085
Investment securities
Net unrealized (losses) gains arising during the period	(3,982)	(656)	564
Less: Net realized gains reclassified to net income	18	79	132
Net change	(4,000)	(735)	432
Translation adjustments
Net unrealized (losses) gains arising during the period	(8)	0	3
Net unrealized gains (losses) arising during the period	7	0	(3)
Translation adjustments and net investment hedges, net change	(1)	0	0
Cash flow hedges
Net unrealized (losses) gains arising during the period	(2)	0	129
Less: Net realized gains reclassified to net income	15	47	49
Net change	(17)	(47)	80
Defined benefit pension plans
Net unrealized gains (losses) arising during the period	2	(8)	(4)
Less: Net realized losses reclassified to net income	(115)	(1)	0
Net change	117	(7)	(4)
Other comprehensive (loss) income, net of tax	(3,901)	(789)	508
Comprehensive (loss) income	$ (2,187)	$ 2,271	$ 1,593