Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	12 Months Ended
	Dec. 22, 2022	Sep. 30, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Common stock dividends declared and paid			$ 1,700	$ 3,500	$ 800
Preferred stock dividends declared and paid			$ 59	$ 59
Amount set aside for preferred stock payments	$ 59
Preferred stock par value (in dollars per share)			$ 0.01	$ 0.01
Proceeds from issuance of preferred stock			$ 0	$ 0	492
Series A
Class of Stock [Line Items]
Preferred stock dividends declared and paid	$ 29		$ 58	$ 58	58
Preferred stock dividends declared (in dollars per share)	$ 28.75
Preferred stock shares issued (in shares)			1,000,000	1,000,000
Series B
Class of Stock [Line Items]
Preferred stock dividends declared and paid	$ 16		$ 32	$ 32	$ 32
Preferred stock dividends declared (in dollars per share)	$ 32.50
Preferred stock shares issued (in shares)			500,000	500,000
Series C
Class of Stock [Line Items]
Preferred stock dividends declared and paid	$ 14		$ 29	$ 30
Preferred stock dividends declared (in dollars per share)	$ 28.50
Preferred stock shares issued (in shares)		500,000	500,000	500,000
Preferred stock par value (in dollars per share)		$ 0.01
Liquidation preference (in dollars per share)		$ 1,000
Proceeds from issuance of preferred stock		$ 492
Preferred stock dividend rate (as a percent)		5.70%
Series C | US Treasury Interest Rate
Class of Stock [Line Items]
Variable dividend payment rate (as a percent)		4.997%