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Debt - Narrative (Details) - USD ($)				1 Months Ended	3 Months Ended
	Apr. 01, 2021	Mar. 31, 2021	Mar. 11, 2021	Apr. 30, 2021	Mar. 31, 2021	Mar. 31, 2020	Mar. 15, 2021	Dec. 31, 2020
Line of Credit Facility [Abstract]
Loss on extinguishment of debt					$ (34,000,000)	$ 0
New Term Loan Facility
Line of Credit Facility [Abstract]
Debt instrument, term			7 years
Long-term debt, gross		$ 1,291,000,000	$ 1,300,000,000		1,291,000,000			$ 0
Original principal		1,300,000,000			1,300,000,000
Prior Term Loan Facility
Line of Credit Facility [Abstract]
Long-term debt, gross		0			0			1,607,000,000
Original principal		2,150,000,000			2,150,000,000
Repayments of debt			$ 313,000,000
Senior Notes due 2029
Line of Credit Facility [Abstract]
Long-term debt, gross		1,075,000,000			1,075,000,000			0
Original principal		$ 1,075,000,000			$ 1,075,000,000		$ 1,075,000,000
Interest rate		4.63%			4.63%		4.625%
Senior Notes due 2026
Line of Credit Facility [Abstract]
Long-term debt, gross		$ 0			$ 0			615,000,000
Original principal		615,000,000			$ 615,000,000
Loss on extinguishment of debt		$ 30,000,000
Interest rate		6.50%			6.50%
Amortization of debt premium		$ 21,000,000
Senior Notes due 2025
Line of Credit Facility [Abstract]
Long-term debt, gross		450,000,000			$ 450,000,000			$ 450,000,000
Original principal		$ 450,000,000			$ 450,000,000
Interest rate		5.75%			5.75%
Senior Notes due 2025 | Subsequent Event
Line of Credit Facility [Abstract]
Original principal	$ 450,000,000
Amortization of debt premium	$ 19,000,000
Minimum | New Term Loan Facility | Base Rate
Line of Credit Facility [Abstract]
Basis spread on variable rate			1.50%
Minimum | New Term Loan Facility | LIBOR
Line of Credit Facility [Abstract]
Basis spread on variable rate			2.50%
Maximum | New Term Loan Facility | Base Rate
Line of Credit Facility [Abstract]
Basis spread on variable rate			1.25%
Maximum | New Term Loan Facility | LIBOR
Line of Credit Facility [Abstract]
Basis spread on variable rate			2.25%
Revolving Credit Facility | New Revolving Facility
Line of Credit Facility [Abstract]
Debt instrument, term			5 years
Original principal			$ 350,000,000
Drawn loan amount, percent of debt			35.00%
Net leverage ratio benchmark			4.75
Loss on extinguishment of debt					$ (4,000,000)
Revolving Credit Facility | New Revolving Facility | Subsequent Event
Line of Credit Facility [Abstract]
Proceeds from issuance of debt				$ 25,000,000
Revolving Credit Facility | New Revolving Facility | Base Rate
Line of Credit Facility [Abstract]
Basis spread on variable rate			1.00%
Revolving Credit Facility | New Revolving Facility | LIBOR
Line of Credit Facility [Abstract]
Basis spread on variable rate			2.00%
Revolving Credit Facility | New Revolving Facility | Letter of Credit
Line of Credit Facility [Abstract]
Maximum borrowing capacity			$ 125,000,000
Revolving Credit Facility | Minimum | New Revolving Facility | Base Rate
Line of Credit Facility [Abstract]
Basis spread on variable rate			1.25%
Revolving Credit Facility | Minimum | New Revolving Facility | LIBOR
Line of Credit Facility [Abstract]
Basis spread on variable rate			2.25%
Revolving Credit Facility | Maximum | New Revolving Facility | Base Rate
Line of Credit Facility [Abstract]
Basis spread on variable rate			0.75%
Revolving Credit Facility | Maximum | New Revolving Facility | LIBOR
Line of Credit Facility [Abstract]
Basis spread on variable rate			1.75%

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Debt Instrument, Covenant Benchmark, Net Leverage Ratio

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Debt Instrument, Drawn Loan Amount, Percent of Debt

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Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Face (par) amount of debt instrument at time of issuance.

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

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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