Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Balance		$ 6,842	$ 6,712	$ 6,655
Accounting Standards Update [Extensible List]			Accounting Standards Update 2016-13
Cumulative Effect, Period of Adoption, Adjustment
Balance	[1]		$ (10)
Accounting Standards Update [Extensible List]			Accounting Standards Update 2016-13
Common Stock (Par Value: $0.01)
Dividends paid on common stock, per share		$ 0.68	$ 0.68	$ 0.68
Balance		$ 5	$ 5	$ 5
Preferred Stock (Par Value: $0.01)
Dividends paid on preferred stock, per share		$ 63.76	$ 63.76	$ 63.76
Balance		$ 503	$ 503	$ 503
Retained Earnings
Balance		$ 494	342	$ 297
Retained Earnings | Cumulative Effect, Period of Adoption, Adjustment
Balance	[1]		$ (10)
Accounting Standards Update [Extensible List]			Accounting Standards Update 2016-13

[1] Amount represents a $10 million cumulative adjustment, net of tax, to retained earnings as of January 1, 2020, as a result of the adoption of ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which became effective January 1, 2020.