Stockholders' Equity and EPS - Preferred Stock Summary (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Feb. 02, 2021 $ / shares	Dec. 09, 2019 $ / shares
Class of Stock [Line Items]
Carrying value | $	$ 3,646	$ 3,646
Shares issued and outstanding | shares	383,500	383,500
Par Value	$ 0.001	$ 0.001
Series A Preferred Stock
Class of Stock [Line Items]
Amount outstanding | $	$ 350
Carrying value | $	$ 340
Shares issued and outstanding | shares	350,000
Par Value	$ 0.001
Preferred stock, depository share ownership interest	0.025
Preferred stock, liquidation preference per depositary share				$ 25
2021 dividends paid per depository share, usd per share	$ 0.33
Series B Preferred Stock
Class of Stock [Line Items]
Amount outstanding | $	$ 750
Carrying value | $	$ 739
Shares issued and outstanding | shares	7,500
Par Value	$ 0.001
Preferred stock, depository share ownership interest	0.01
Preferred stock, liquidation preference per depositary share			$ 1,000
2021 dividends paid per depository share, usd per share	$ 10.25
Series C Preferred Stock
Class of Stock [Line Items]
Amount outstanding | $	$ 1,000
Carrying value | $	$ 985
Shares issued and outstanding | shares	10,000
Par Value	$ 0.001
Preferred stock, depository share ownership interest	0.01
Preferred stock, liquidation preference per depositary share			1,000
2021 dividends paid per depository share, usd per share	$ 10.00
Series D Preferred Stock
Class of Stock [Line Items]
Amount outstanding | $	$ 1,000
Carrying value | $	$ 989
Shares issued and outstanding | shares	10,000
Par Value	$ 0.001
Preferred stock, depository share ownership interest	0.01
Preferred stock, liquidation preference per depositary share			1,000
2021 dividends paid per depository share, usd per share	$ 12.63
Series E Preferred Stock
Class of Stock [Line Items]
Amount outstanding | $	$ 600
Carrying value | $	$ 593
Shares issued and outstanding | shares	6,000
Par Value	$ 0.001
Preferred stock, depository share ownership interest	0.01
Preferred stock, liquidation preference per depositary share			$ 1,000
2021 dividends paid per depository share, usd per share	$ 13.97