Investment Securities - Schedule Of Realized Gain (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Gross realized gains	$ 0	$ 1
Gross realized losses	(495)	0
Net realized (loss) gain on available-for-sale securities	(495)	1
Net realized gain on equity securities	8	17
Net unrealized (loss) gain on equity securities	(12)	11
Other (loss) gain on investments, net	$ (499)	$ 29