Investment Securities - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Accrued interest receivables on investment securities	$ 82	$ 87
Impairment losses	19	0	$ 1
Securities with a fair value, pledged as collateral	11,200	11,000
Investment Holdings [Line Items]
Unrealized losses	144	37
Non-rated Securities
Investment Holdings [Line Items]
Unrealized losses	$ 2	$ 1