Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended
	Jan. 31, 2024	Jan. 31, 2024	Mar. 31, 2024	Mar. 31, 2023	Mar. 15, 2024	Jan. 19, 2024	Dec. 31, 2023
Class of Stock [Line Items]
Proceeds from issuance of preferred stock, net of issuance costs			$ 1,481	$ 0
Series I Preferred Stock, Depository Share
Class of Stock [Line Items]
Ownership Interest Per Depositary Share		1.00%
Preferred stock issued (shares)		1,500,000
Liquidation preference per share (USD per share)	$ 1,000	$ 1,000
Series I Preferred Stock
Class of Stock [Line Items]
Ownership Interest Per Depositary Share		1.00%
Preferred stock issued (shares)	1,500,000
Liquidation preference per share (USD per share)	$ 100,000	$ 100,000
Proceeds from issuance of preferred stock, net of issuance costs	$ 1,500
Per annum dividend rate		6.70%
Preferred stock, shares outstanding (in shares)			15,000				15,000
Series F Preferred Stock
Class of Stock [Line Items]
Liquidation preference per share (USD per share)					$ 100,000
Redemption price					$ 1,000
Preferred stock, shares outstanding (in shares)			2,500		2,500		2,500
Series D Preferred Stock
Class of Stock [Line Items]
Liquidation preference per share (USD per share)					$ 100,000
Preferred stock, shares outstanding (in shares)			7,500		7,500		7,500
Series D Preferred Stock, Depository Share
Class of Stock [Line Items]
Liquidation preference per share (USD per share)					$ 25
Preferred stock, shares outstanding (in shares)					30,000,000
Series F Preferred Stock, Depository Share
Class of Stock [Line Items]
Liquidation preference per share (USD per share)					$ 1,000
Preferred stock, shares outstanding (in shares)					250,000
2023 Share Repurchase Program
Class of Stock [Line Items]
Total Acquired (In millions)			$ 0	1,250
2024 Share Repurchase Program
Class of Stock [Line Items]
Total Acquired (In millions)			$ 100	$ 0
Amount of common stock authorized for repurchase						$ 5,000