Long-Term Debt and Credit Facilities - Borrowings and Repayments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Long-term Debt and Credit Facilities
Gain (loss) on extinguishment of debt	$ 618	$ 214	$ 8
Revolving Credit Facility
Long-term Debt and Credit Facilities
Borrowings	925	2,400
Repayments of debt	$ 725	$ 2,600