Long-Term Debt - Schedule of Interest Expense, Net and Other (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Mar. 27, 2017	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Debt Disclosure [Abstract]
Debt		$ 118.9	$ 103.5	$ 218.9	$ 204.7
Capital lease obligations		5.0	5.0	10.0	9.8
Amortization of deferred financing costs and debt issuance discount		8.2	9.6	16.7	19.3
Interest income		(4.1)	(0.9)	(6.2)	(1.5)
Interest expense, net		$ 128.0	$ 117.2	$ 239.4	$ 232.3
Popeyes Acquisition
Business Acquisition [Line Items]
Repayments of Debt	$ 155.5