Fair Value of Financial Instruments - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Aug. 31, 2016	Dec. 31, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Principal amount of notes and other debt	$ 4,167,967,000		$ 3,639,300,000
Estimated fair value of future contingent consideration	98,600,000	$ 98,600,000
Change in fair value of contingent consideration liability	0
Prices with Other Observable Inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Notes and other debt, fair value	$ 4,300,000,000