Shareholders' Equity - Schedule of Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions				1 Months Ended					9 Months Ended	63 Months Ended	64 Months Ended	119 Months Ended	121 Months Ended
	Mar. 15, 2026	Mar. 15, 2024	Dec. 15, 2023	Jun. 30, 2021	Sep. 30, 2018	Apr. 30, 2016	May 31, 2015	Feb. 28, 2014	Jun. 14, 2021	Dec. 14, 2023	Sep. 14, 2020	Mar. 14, 2026	Mar. 14, 2024	Mar. 15, 2021	Dec. 31, 2020	Mar. 31, 2020
Series D Preferred Stock, Depository Share
Class of Stock [Line Items]
Depositary shares issued (shares)								30,000,000
Liquidation preference per share (USD per share)								$ 25
Series D Preferred Stock
Class of Stock [Line Items]
Ownership Interest Per Depositary Share								0.025%
Liquidation preference per share (USD per share)								$ 100,000
Preferred stock				$ 742											$ 742
Series D Preferred Stock | Forecast
Class of Stock [Line Items]
Per annum dividend rate													5.90%
Series F Preferred Stock, Depository Share
Class of Stock [Line Items]
Depositary shares issued (shares)							250,000
Liquidation preference per share (USD per share)							$ 1,000							$ 1,000
Series F Preferred Stock
Class of Stock [Line Items]
Ownership Interest Per Depositary Share							1.00%
Liquidation preference per share (USD per share)							$ 100,000							$ 100,000
Per annum dividend rate											5.25%
Preferred stock				247											742
Series G Preferred Stock, Depository Share
Class of Stock [Line Items]
Depositary shares issued (shares)						20,000,000
Liquidation preference per share (USD per share)						$ 25
Series G Preferred Stock
Class of Stock [Line Items]
Ownership Interest Per Depositary Share						0.025%
Liquidation preference per share (USD per share)						$ 100,000
Preferred stock				493											493
Series G Preferred Stock | Forecast
Class of Stock [Line Items]
Per annum dividend rate												5.35%
Series H Preferred Stock, Depository Share
Class of Stock [Line Items]
Depositary shares issued (shares)					500,000
Liquidation preference per share (USD per share)																$ 1,000
Series H Preferred Stock
Class of Stock [Line Items]
Ownership Interest Per Depositary Share					1.00%
Liquidation preference per share (USD per share)																$ 100,000
Preferred stock				$ 494											$ 494
Series H Preferred Stock | Forecast
Class of Stock [Line Items]
Per annum dividend rate										5.625%
London Interbank Offered Rate (LIBOR) | Series D Preferred Stock | Forecast
Class of Stock [Line Items]
Per annum dividend rate, basis spread on variable rate		3.108%
London Interbank Offered Rate (LIBOR) | Series F Preferred Stock
Class of Stock [Line Items]
Per annum dividend rate, basis spread on variable rate				3.71588%					3.597%
London Interbank Offered Rate (LIBOR) | Series G Preferred Stock | Forecast
Class of Stock [Line Items]
Per annum dividend rate, basis spread on variable rate	3.709%
London Interbank Offered Rate (LIBOR) | Series H Preferred Stock | Forecast
Class of Stock [Line Items]
Per annum dividend rate, basis spread on variable rate			2.539%