Senior Secured Credit Facility (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Jun. 30, 2016
Senior Secured Credit Facility
Debt and Lease Obligation	$ 3,644,200,000		$ 3,657,000,000.0
Letters of Credit Outstanding, Amount	100,000
Incremental Borrowings, Amount	$ 1,000,000,000.0
Incremental Borrowings Criteria, Percentage of Consolidated EBITDA	100.00%
Incremental Borrowings Criteria, Senior Secured Leverage ratio	4.25
Net Leverage Ratio Requirement	5.5
Covenant Dividend Restriction Amount	$ 75,000,000
Covenant Dividend Restriction Percentage of Consolidated EBITDA	7.50%
Net Leverage Ratio Requirement, Dividends	4.75
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	$ 35,700,000	$ 12,800,000
Hedge instruments: Net change on interest rate cap	500,000	4,600,000
2020 3 year Interest Rate Swap [Member]
Senior Secured Credit Facility
Derivative, Notional Amount	$ 1,110,000,000.0
2020 3 year Interest Rate Swap [Member] | Minimum [Member]
Senior Secured Credit Facility
Derivative, Fixed Interest Rate	0.9125%
2020 3 year Interest Rate Swap [Member] | Maximum [Member]
Senior Secured Credit Facility
Derivative, Fixed Interest Rate	0.928%
2020 2 year Interest Rate Swap [Member]
Senior Secured Credit Facility
Derivative, Notional Amount	$ 1,150,000,000.0
2020 2 year Interest Rate Swap [Member] | Minimum [Member]
Senior Secured Credit Facility
Derivative, Fixed Interest Rate	0.52%
2020 2 year Interest Rate Swap [Member] | Maximum [Member]
Senior Secured Credit Facility
Derivative, Fixed Interest Rate	0.5295%
Interest Rate Swap [Member]
Senior Secured Credit Facility
Derivative, Notional Amount	$ 1,425,000,000.0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	35,300,000	10,400,000
Interest Expense, Hedge, gross of tax	3,700,000	500,000
Hedge instruments: Net change on interest rate cap	46,900,000	13,800,000
Interest Expense, Hedge, net of tax	3,100,000	300,000
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ (35,900,000)
Interest Rate Swap [Member] | Minimum [Member]
Senior Secured Credit Facility
Derivative, Fixed Interest Rate	2.702%
Interest Rate Swap [Member] | Maximum [Member]
Senior Secured Credit Facility
Derivative, Fixed Interest Rate	2.706%
Interest Rate Cap [Member]
Senior Secured Credit Facility
Derivative, Cap Interest Rate	0.75%			0.75%
Derivative, Notional Amount	$ 1,246,900,000
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	300,000	3,400,000
Hedge instruments: Net change on interest rate cap	500,000	4,600,000
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion	(2,100,000)	(1,600,000)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	1,800,000	$ 1,000,000.0
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ 4,500,000
Interest Rate Cap [Member] | London Interbank Offered Rate (LIBOR) [Member]
Senior Secured Credit Facility
Debt Instrument, Description of Variable Rate Basis	LIBOR
Interest Rate Cap [Member] | Minimum [Member]
Senior Secured Credit Facility
Derivative, Fixed Interest Rate	0.98%
Interest Rate Cap [Member] | Maximum [Member]
Senior Secured Credit Facility
Derivative, Fixed Interest Rate	0.994%
Senior Loans [Member]
Senior Secured Credit Facility
Debt Instrument, Description of Variable Rate Basis	LIBOR
Senior Secured Term Loan B-5 [Member]
Senior Secured Credit Facility
Debt and Lease Obligation	$ 2,502,500,000		2,508,500,000
Debt Instrument, Fair Value Disclosure	2,398,900,000
Senior Secured Revolving Line of Credit
Senior Secured Credit Facility
Debt and Lease Obligation	0		0
Line of Credit Facility, Remaining Borrowing Capacity	299,900,000
Senior Secured Term Loan A-3 [Member]
Senior Secured Credit Facility
Debt and Lease Obligation	1,137,800,000		$ 1,144,500,000
Debt Instrument, Fair Value Disclosure	$ 1,057,100,000