Investment Securities - Schedule Of Realized Gain (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Gross realized gains	$ 2	$ 0	$ 2	$ 1
Gross realized losses	0	0	(495)	0
Net realized gain (loss) on available-for-sale securities	2	0	(493)	1
Net realized gain on equity securities	25	21	33	38
Net unrealized gain (loss) on equity securities	34	(28)	22	(17)
Other gain (loss) on investments, net	$ 61	$ (7)	$ (438)	$ 22