Investment Securities - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Marketable Securities [Abstract]
Available-for-sale securities sold	$ 0	$ 0
Available-for-sale, accrued interest, after allowance for credit loss	26,000,000		$ 28,000,000
Transfers between available for sale and held to maturity debt securities	0	0
Held-to-maturity, accrued interest, after allowance for credit loss	3,000,000		3,000,000
Allowance for credit loss	0		0
Carrying amount of equity investments without a readily determinable fair value	122,000,000		$ 119,000,000
Unrealized net losses for equity investments with readily determinable fair value	$ 1,000,000	$ 2,000,000