Investment Securities - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Available-for-sale securities sold	$ 10,000,000	$ 0	$ 85,000,000	$ 0
Gross realized gains (losses)	0	0	0	1,000,000
Equity securities with readily determinable fair values	55,000,000		55,000,000		$ 14,000,000
Equity securities, gain	$ 21,000,000	$ 0	$ 22,000,000	$ 0