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Long-term Debt and Finance Leases - Senior Notes Redemptions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2023
Debt Instrument [Line Items]
Principal Repurchased	$ 1,855
Cash Paid	1,949
Accrued interest	29
Senior Notes due 2026
Debt Instrument [Line Items]
Interest rate, stated percentage		7.25%
Principal Repurchased	1,000
Cash Paid	$ 1,056
Average Early Redemption Percentage	103.625%
Senior Notes, due 2027
Debt Instrument [Line Items]
Interest rate, stated percentage		6.625%
Principal Repurchased	$ 855
Cash Paid	$ 893
Average Early Redemption Percentage	103.313%

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