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Long-Term Debt - Amendments to the Credit Agreement (Details) - USD ($)				12 Months Ended
	Sep. 19, 2019	Aug. 15, 2019	Sep. 30, 2016	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jun. 12, 2019	Jun. 11, 2019	Nov. 30, 2017
Debt Instrument [Line Items]
Long-term debt				$ 3,749,200,000
Additional proceeds under term loan				1,404,800,000	$ 15,300,000	$ 1,106,200,000
Consolidated total net leverage ratio							450.00%	400.00%
Minimum acquisition consideration				250,000,000.0
Term Loan B Facility
Debt Instrument [Line Items]
Long-term debt	$ 1,635,000,000		$ 2,400,000,000	$ 2,400,000,000
Additional proceeds under term loan			$ 200,000,000.0
Increase to loan borrowing capacity	$ 500,500,000
Term Loan B Facility | Eurocurrency Loans
Debt Instrument [Line Items]
Applicable margin	2.00%
Term Loan B Facility | Adjustable Base Rate Loans
Debt Instrument [Line Items]
Applicable margin	1.00%
Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		$ 1,970,000,000					$ 1,900,000,000		$ 1,000,000,000.0
Increase in borrowing capacity		$ 70,000,000.0
Repayments of Revolving Credit Facility	$ 500,000,000.0

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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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