Investment Securities - Schedule Of Realized Gain (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Gross realized gains	$ 1	$ 0	$ 2	$ 5
Net realized gain on available-for-sale securities	1	0	2	5
Net realized gain on equity securities	15	15	53	21
Net unrealized gain (loss) on equity securities	58	(56)	41	33
Other gain (loss) on investments, net	$ 74	$ (41)	$ 96	$ 59