Investment Securities - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Marketable Securities [Abstract]
Gains (losses) on available-for-sale securities	$ 0	$ 0	$ 0	$ 0
Proceeds from sales of securities available for sale	0	35,000,000	0	68,000,000
Available-for-sale, accrued interest, after allowance for credit loss	27,000,000		27,000,000		$ 23,000,000
Held-to-maturity, accrued interest, after allowance for credit loss	3,000,000		3,000,000		1,000,000
Allowance for credit loss	0		0		0
Carrying amount of equity investments without a readily determinable fair value	78,000,000		78,000,000		$ 70,000,000
Unrealized (losses) gains for equity investments with readily determinable fair values	$ 2,000,000	$ 1,000,000	$ 15,000,000	$ 7,000,000