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	$ 668	$ 957	$ 1,714
Available-for-sale securities
Net unrealized (losses) gains arising during the period	(158)	260	(3,982)
Net unrealized loss on securities transferred to held-to-maturity	0	693	0
Less: Net realized gains reclassified to net income	3	4	18
Net change	(161)	949	(4,000)
Held-to-maturity securities
Net unrealized loss on securities transferred from available-for-sale	0	(693)	0
Less: Amortization of amounts previously recorded upon transfer from available-for-sale	(66)	(11)	0
Net change	66	(682)	0
Translation adjustments
Net unrealized (losses) gains arising during the period	(13)	5	(8)
Net investment hedges
Net unrealized gains (losses) arising during the period	12	(2)	7
Translation adjustments and net investment hedges, net change	(1)	3	(1)
Cash flow hedges
Net unrealized losses arising during the period	(21)	(16)	(2)
Less: Net realized (losses) gains reclassified to net income	(9)	11	15
Net change	(12)	(27)	(17)
Defined benefit pension plans
Net unrealized gains arising during the period	0	0	2
Less: Net realized losses reclassified to net income	0	0	(115)
Net change	0	0	117
Other comprehensive (loss) income, net of tax	(108)	243	(3,901)
Comprehensive income (loss)	$ 560	$ 1,200	$ (2,187)