Investment Securities - Narrative (Details) - USD ($)	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Marketable Securities [Abstract]
Gains (losses) on available-for-sale securities	$ 0	$ 0
Proceeds from sales of securities available for sale	0	26,000,000
Available-for-sale, accrued interest, after allowance for credit loss	23,000,000		$ 23,000,000
Held-to-maturity, accrued interest, after allowance for credit loss	1,000,000		1,000,000
Allowance for credit loss	0		0
Carrying amount of equity investments without a readily determinable fair value	76,000,000		$ 70,000,000
Unrealized gain (loss) for equity investments with readily determinable fair values	$ 4,000,000	$ 3,000,000

Amount, after allowance for credit loss, of accrued interest on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, after allowance for credit loss, of accrued interest on investment in debt security measured at amortized cost (held-to-maturity).

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