Income Taxes - Reconciliation of Income Tax Provision (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 25, 2016	Sep. 25, 2016	Jun. 26, 2016	Mar. 27, 2016	Dec. 27, 2015	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 25, 2016	Dec. 27, 2015	Dec. 28, 2014
Income Tax Disclosure [Abstract]
Income tax (benefit) at federal statutory rate									$ (18.3)	$ (15.6)	$ (25.1)
State taxes, net of federal tax benefit and valuation allowance									0.2	(0.2)	0.8
Difference in tax rates between U.S. and foreign									0.1	(0.7)	(1.4)
Increase in federal valuation allowance									19.1	0.0	26.0
Nondeductible expense									0.7	0.8	1.5
Increase in reserve for uncertain tax positions									2.2	0.9	0.9
Changes to indefinite life items and separate state deferred taxes									4.1	3.4	1.2
Total	$ 0.8	$ 1.9	$ 1.8	$ 3.6	$ (0.3)	$ (15.3)	$ 2.3	$ 1.9	$ 8.1	$ (11.4)	$ 3.9