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Long-term debt (Detail) - USD ($) $ in Thousands		3 Months Ended
Long-term debt (Detail) - USD ($) $ in Thousands	May 06, 2019	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Debt Instrument, Maturity Date		Dec. 24, 2019
Senior Notes
Acquisition obligations and other notes payable		$ 181,885	$ 183,979
Finance Lease, Liability		$ 276,564	282,737
Debt Instrument, Interest Rate During Period		5.16%
Long-term Debt, Weighted Average Interest Rate, at Point in Time		5.14%
Total debt principal outstanding		$ 10,512,199	10,154,216
Discount and deferred financing costs		(48,495)	(52,000)
Total amount of long-term debt		10,463,704	10,102,216
Less current portion		(4,676,691)	(1,929,369)
Long-term debt		$ 5,787,013	8,172,847
Debt Instrument, table footnotes
Term Loan A, Term Loan A-2, and Revolver debt Instruments, Maturity Date		Dec. 24, 2019
Senior Notes Five Point Seven Five Percentage Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Maturity Date		Aug. 15, 2022
Debt Instrument, Fair Value Disclosure		$ 1,271,875
Senior Notes
Senior Notes		$ 1,250,000	1,250,000
Debt Instrument, Interest Rate During Period		5.75%
Debt Instrument, table footnotes
Term Loan A, Term Loan A-2, and Revolver debt Instruments, Maturity Date		Aug. 15, 2022
Senior Notes Five Point One Two Five Percent Due Twenty Twenty Four
Debt Instrument [Line Items]
Debt Instrument, Maturity Date		Jul. 15, 2024
Debt Instrument, Fair Value Disclosure		$ 1,729,175
Senior Notes
Senior Notes		$ 1,750,000	1,750,000
Debt Instrument, Interest Rate During Period		5.125%
Debt Instrument, table footnotes
Term Loan A, Term Loan A-2, and Revolver debt Instruments, Maturity Date		Jul. 15, 2024
Senior Notes Five Point Zero Percent Due Twenty Twenty Five
Debt Instrument [Line Items]
Debt Instrument, Maturity Date		May 01, 2025
Debt Instrument, Fair Value Disclosure		$ 1,439,250
Senior Notes
Senior Notes		$ 1,500,000	1,500,000
Debt Instrument, Interest Rate During Period		5.00%
Debt Instrument, table footnotes
Term Loan A, Term Loan A-2, and Revolver debt Instruments, Maturity Date		May 01, 2025
Notes Payable, Other Payables
Senior Notes
Long-term Debt, Weighted Average Interest Rate, at Point in Time		6.30%
Debt Instrument, Maturity Date, Description		2019-2026
Finance Lease
Senior Notes
Finance Lease, Weighted Average Discount Rate, Percent		4.84%
Debt Instrument, Maturity Date, Description		2019-2036
Senior Secured Credit Facilities
Senior Notes
Long-term Debt, Weighted Average Interest Rate, at Point in Time		5.00%
Debt Instrument, table footnotes
Debt Instrument, Unamortized Discount		$ 5,487
Deferred Offering Costs		11,319
Senior Notes
Debt Instrument, table footnotes
Deferred Offering Costs		31,689
Term Loan A
Debt Instrument [Line Items]
Senior Secured Credit Facilities		$ 650,000	675,000
Debt Instrument, Description of Variable Rate Basis		2.00% + LIBOR
Debt Instrument, Maturity Date		Dec. 24, 2019
Debt Instrument, Fair Value Disclosure		$ 649,155
Debt Instrument, table footnotes
Term Loan A, Term Loan A-2, and Revolver debt Instruments, Maturity Date		Dec. 24, 2019
Term Loan A-2
Debt Instrument [Line Items]
Senior Secured Credit Facilities		$ 995,000	995,000
Debt Instrument, Description of Variable Rate Basis		1.00% + LIBOR
Debt Instrument, Maturity Date		Dec. 24, 2019
Debt Instrument, Fair Value Disclosure		$ 999,975
Debt Instrument, table footnotes
Term Loan A, Term Loan A-2, and Revolver debt Instruments, Maturity Date		Dec. 24, 2019
Term Loan B
Debt Instrument [Line Items]
Senior Secured Credit Facilities		$ 3,333,750	3,342,500
Debt Instrument, Description of Variable Rate Basis		2.75% + LIBOR
Debt Instrument, Maturity Date		Jun. 24, 2021
Debt Instrument, Fair Value Disclosure		$ 3,350,419
Debt Instrument, table footnotes
Term Loan A, Term Loan A-2, and Revolver debt Instruments, Maturity Date		Jun. 24, 2021
Revolver
Debt Instrument [Line Items]
Senior Secured Credit Facilities		$ 575,000	$ 175,000
Debt Instrument, Description of Variable Rate Basis		2.00% + LIBOR
Debt Instrument, Maturity Date		Dec. 24, 2019
Debt Instrument, Fair Value Disclosure		$ 575,000
Debt Instrument, table footnotes
Term Loan A, Term Loan A-2, and Revolver debt Instruments, Maturity Date		Dec. 24, 2019
Minimum \| London Interbank Offered Rate (LIBOR) \| Term Loan B
Debt Instrument, table footnotes
LIBOR plus interest rate margin		0.75%
Subsequent Event
Debt Instrument, table footnotes
Long-Term Debt Maturity Extension Term	6 months