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Long-term Debt and Finance Leases - Redemptions (Details) - USD ($)		1 Months Ended
	Aug. 24, 2021	Nov. 04, 2021
Debt Instrument, Redemption [Line Items]
Principal Repurchased	$ 1,400,000,000
Cash paid	$ 1,400,000,000
Senior Notes, due 2026
Debt Instrument, Redemption [Line Items]
Interest rate, stated percentage	7.25%
Principal Repurchased	$ 1,000,000,000
Cash paid	$ 1,056,000,000
Average Early Redemption Percentage	103.625%
Senior Notes, due 2027
Debt Instrument, Redemption [Line Items]
Interest rate, stated percentage	6.625%
Principal Repurchased	$ 355,000,000
Cash paid	$ 369,000,000
Average Early Redemption Percentage	103.313%
Senior Notes, due 2027 | Subsequent Event
Debt Instrument, Redemption [Line Items]
Interest rate, stated percentage		6.625%
Principal Repurchased		$ 500,000,000
Cash paid		$ 524,000,000
Average Early Redemption Percentage		103.313%
Senior Notes
Debt Instrument, Redemption [Line Items]
Principal Repurchased	$ 1,355,000,000
Cash paid	1,425,000,000
Accrued interest	$ 22,000,000
Senior Notes | Subsequent Event
Debt Instrument, Redemption [Line Items]
Principal Repurchased		$ 1,855,000,000
Cash paid		1,949,000,000
Accrued interest		$ 29,000,000

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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