Stockholders' Equity and EPS - Preferred Stock Summary Schedule (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Oct. 28, 2021	May 13, 2021	Feb. 02, 2021	Dec. 31, 2020	Dec. 09, 2019
Class of Stock [Line Items]
Preferred stock, shares issued, value	$ 3,646				$ 340
Preferred stock, shares issued	383,500				350,000
Preferred stock, shares outstanding	383,500				350,000
Par Value	$ 0.001				$ 0.001
Series A Preferred Stock
Class of Stock [Line Items]
Amount outstanding	$ 350
Preferred stock, shares issued, value	$ 340
Preferred stock, shares issued	350,000
Preferred stock, shares outstanding	350,000
Par Value	$ 0.001					$ 0.001
Ownership interest per depository share (usd per share)	2.50%
Liquidation preference per depository share (usd per share)	$ 25					$ 25
2021 dividends paid per depository share (usd per share)	$ 1.31
Series B Preferred Stock
Class of Stock [Line Items]
Amount outstanding	$ 750
Preferred stock, shares issued, value	$ 739
Preferred stock, shares issued	7,500
Preferred stock, shares outstanding	7,500
Par Value	$ 0.001			$ 0.001
Ownership interest per depository share (usd per share)	1.00%
Liquidation preference per depository share (usd per share)	$ 1,000			$ 1,000
2021 dividends paid per depository share (usd per share)	$ 32.23
Series C Preferred Stock
Class of Stock [Line Items]
Amount outstanding	$ 1,000
Preferred stock, shares issued, value	$ 985
Preferred stock, shares issued	10,000
Preferred stock, shares outstanding	10,000
Par Value	$ 0.001		$ 0.001
Ownership interest per depository share (usd per share)	1.00%
Liquidation preference per depository share (usd per share)	$ 1,000		$ 1,000
2021 dividends paid per depository share (usd per share)	$ 20.22
Series D Preferred Stock
Class of Stock [Line Items]
Amount outstanding	$ 1,000
Preferred stock, shares issued, value	$ 989
Preferred stock, shares issued	10,000
Preferred stock, shares outstanding	10,000
Par Value	$ 0.001	$ 0.001
Ownership interest per depository share (usd per share)	1.00%
Liquidation preference per depository share (usd per share)	$ 1,000	1,000
2021 dividends paid per depository share (usd per share)	$ 0
Series E Preferred Stock
Class of Stock [Line Items]
Amount outstanding	$ 600
Preferred stock, shares issued, value	$ 593
Preferred stock, shares issued	6,000
Preferred stock, shares outstanding	6,000
Par Value	$ 0.001	0.001
Ownership interest per depository share (usd per share)	1.00%
Liquidation preference per depository share (usd per share)	$ 1,000	$ 1,000
2021 dividends paid per depository share (usd per share)	$ 0