Long-term Debt - Amortization of Debt Discount and Debt Issuance Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Discount and Debt Issuance Costs [Roll Forward]
Beginning balance	$ 17	$ 19	$ 19
Capitalized during the year	(5)	(3)	(18)
Amortized/written-off during the year	6	5	18
Closing balance	$ 16	$ 17	19
Amount of debt discount and debt issuance costs written off as loss on extinguishment of debt			$ 13