Stockholders' Equity - Preferred Stock Outstanding (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Class of Stock [Line Items]
Carrying Value (in millions)	$ 4,845	$ 4,845
Series I
Class of Stock [Line Items]
Per Annum Dividend Rate	5.00%
Liquidation Preference per Share (in dollars per share)	$ 1,000
Total Shares Outstanding (in shares)	1,500,000
Carrying Value (in millions)	$ 1,462	1,462
Series J
Class of Stock [Line Items]
Per Annum Dividend Rate	4.80%
Liquidation Preference per Share (in dollars per share)	$ 1,000
Total Shares Outstanding (in shares)	1,250,000
Carrying Value (in millions)	$ 1,209	1,209
Series K
Class of Stock [Line Items]
Per Annum Dividend Rate	4.625%
Liquidation Preference per Share (in dollars per share)	$ 1,000
Total Shares Outstanding (in shares)	125,000
Carrying Value (in millions)	$ 122	122
Series L
Class of Stock [Line Items]
Per Annum Dividend Rate	4.375%
Liquidation Preference per Share (in dollars per share)	$ 1,000
Total Shares Outstanding (in shares)	675,000
Carrying Value (in millions)	$ 652	652
Series M
Class of Stock [Line Items]
Liquidation Preference per Share (in dollars per share)	$ 1,000
Total Shares Outstanding (in shares)	1,000,000
Carrying Value (in millions)	$ 988	988
Series M | Maximum
Class of Stock [Line Items]
Per Annum Dividend Rate	3.95%
Series M | Minimum
Class of Stock [Line Items]
Per Annum Dividend Rate	3.157%
Series N
Class of Stock [Line Items]
Per Annum Dividend Rate	4.25%
Liquidation Preference per Share (in dollars per share)	$ 1,000
Total Shares Outstanding (in shares)	425,000
Carrying Value (in millions)	$ 412	$ 412