Long-Term Debt - Unsecured Notes (Details) - USD ($) $ in Millions	Dec. 31, 2023	Nov. 26, 2019
Debt Instrument [Line Items]
Face Value	$ 3,918
Senior Notes | 2031 Unsecured Notes
Debt Instrument [Line Items]
Face Value	550	$ 550
Senior Notes | 2025 Unsecured Notes
Debt Instrument [Line Items]
Face Value	0
Debt Instrument, Repurchased Face Amount		550
Senior Notes | 2028 Unsecured Notes
Debt Instrument [Line Items]
Face Value	700	700
Senior Notes | 2029 Unsecured Notes
Debt Instrument [Line Items]
Face Value	$ 500	500
Senior Notes | Senior Unsecured Notes, maturing 2022
Debt Instrument [Line Items]
Face Value		$ 1,400