Long-Term Debt and Capital Lease Obligations - Maturities of Long-Term Debt and Capital Lease Obligations (Detail) - USD ($) $ in Millions		Jan. 01, 2016	Dec. 26, 2014
Debt Instrument [Line Items]
2016		$ 6.8
2017		9.2
2018		11.1
2019		14.0
2020		256.7
Total		297.8
Less: Amounts representing interest	[1]	(43.6)
Total long-term debt and capital lease obligations		254.2	$ 266.9
Less: Current portion		(1.5)	(2.2)
Totals, net of current portion of long-term debt and capital lease obligations		252.7	$ 264.7
Long-Term Debt
Debt Instrument [Line Items]
2016		6.1
2017		8.7
2018		10.6
2019		13.8
2020		256.7
Total		295.9
Less: Amounts representing interest	[1]	(43.3)
Total long-term debt and capital lease obligations		252.6
Less: Current portion		(1.0)
Totals, net of current portion of long-term debt and capital lease obligations		$ 251.6
Assumed variable interest rate		3.00%
Capital Leases
Debt Instrument [Line Items]
2016		$ 0.7
2017		0.5
2018		0.5
2019		0.2
2020		0.0
Total		1.9
Less: Amounts representing interest	[1]	(0.3)
Total long-term debt and capital lease obligations		1.6
Less: Current portion		(0.5)
Totals, net of current portion of long-term debt and capital lease obligations		$ 1.1

[1] We utilize a variable interest rate on our long-term debt, and for presentation purposes we have used an assumed rate of 3%