Shareholders' Equity - Narrative (Details) - USD ($)	1 Months Ended		3 Months Ended				12 Months Ended
	Mar. 31, 2023	Feb. 28, 2022	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Jan. 31, 2023	Jul. 31, 2021	Mar. 15, 2021	Apr. 30, 2016	May 31, 2015	Feb. 28, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Preferred stock cash dividend							$ 112,000,000	$ 114,000,000	$ 152,000,000
Total acquired			$ 1,500,000,000	$ 0	$ 0	$ 0
2021 Share Repurchase Program
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount of common stock authorized for repurchase											$ 3,000,000,000
2023 Share Repurchase Program | Subsequent Event
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount of common stock authorized for repurchase										$ 4,500,000,000
Series F Preferred Stock
Accumulated Other Comprehensive Income (Loss) [Line Items]
Redemption price												$ 500,000,000
Preferred shares to be redeemed (in shares)												5,000
Preferred stock, shares outstanding (in shares)			2,500				2,500					7,500
Liquidation preference per share (USD per share)												$ 100,000		$ 100,000
Preferred dividends declared (USD per share)		$ 2,092					$ 5,208	$ 3,808
Preferred stock cash dividend							$ 13,000,000	$ 15,000,000
Series F Preferred Stock | Forecast
Accumulated Other Comprehensive Income (Loss) [Line Items]
Preferred stock cash dividend	$ 5,000,000
Series F Preferred Stock, Depository Share
Accumulated Other Comprehensive Income (Loss) [Line Items]
Liquidation preference per share (USD per share)												$ 1,000		$ 1,000
Preferred dividends declared (USD per share)		20.92					$ 52.08	$ 38.08
Series D Preferred Stock
Accumulated Other Comprehensive Income (Loss) [Line Items]
Preferred stock, shares outstanding (in shares)			7,500				7,500
Liquidation preference per share (USD per share)															$ 100,000
Preferred dividends declared (USD per share)		1,475					$ 5,900	$ 5,900
Preferred stock cash dividend							$ 44,000,000	$ 44,000,000
Series D Preferred Stock | Forecast
Accumulated Other Comprehensive Income (Loss) [Line Items]
Preferred stock cash dividend	11,000,000
Series G Preferred Stock
Accumulated Other Comprehensive Income (Loss) [Line Items]
Preferred stock, shares outstanding (in shares)			5,000				5,000
Liquidation preference per share (USD per share)													$ 100,000
Preferred dividends declared (USD per share)		1,338					$ 5,352	$ 5,352
Preferred stock cash dividend							$ 27,000,000	$ 27,000,000
Series G Preferred Stock | Forecast
Accumulated Other Comprehensive Income (Loss) [Line Items]
Preferred stock cash dividend	$ 7,000,000
Series D Preferred Stock, Depository Share
Accumulated Other Comprehensive Income (Loss) [Line Items]
Liquidation preference per share (USD per share)															$ 25
Preferred dividends declared (USD per share)		0.37					$ 1.48	$ 1.48
Series G Preferred Stock, Depository Share
Accumulated Other Comprehensive Income (Loss) [Line Items]
Liquidation preference per share (USD per share)													$ 25
Preferred dividends declared (USD per share)		$ 0.33					$ 1.32	$ 1.32