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Income Taxes - Components of Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
Domestic									$ (84.0)	$ (39.4)	$ (120.3)
Foreign									11.1	7.5	5.8
Loss from continuing operations before income taxes									(72.9)	(31.9)	(114.5)
Federal income taxes:
Current									0us-gaap_CurrentFederalTaxExpenseBenefit	(1.7)us-gaap_CurrentFederalTaxExpenseBenefit	0us-gaap_CurrentFederalTaxExpenseBenefit
Deferred									3.3	0.3	(3.5)
Total Federal									3.3	(1.4)	(3.5)
State and local income taxes
Current									1.6	2.0	0.8
Deferred									(1.7)	(0.7)	0.4
Total State and local									(0.1)	1.3	1.2
Foreign income taxes:
Current									1.2us-gaap_CurrentForeignTaxExpenseBenefit	0.1us-gaap_CurrentForeignTaxExpenseBenefit	0.1us-gaap_CurrentForeignTaxExpenseBenefit
Deferred									0.7	0	0.6
Total Foreign									1.9	0.1	0.7
Total	$ 1.4us-gaap_IncomeTaxExpenseBenefit	$ (0.2)us-gaap_IncomeTaxExpenseBenefit	$ 1.6us-gaap_IncomeTaxExpenseBenefit	$ 2.3us-gaap_IncomeTaxExpenseBenefit	$ (2.9)us-gaap_IncomeTaxExpenseBenefit	$ 0.2us-gaap_IncomeTaxExpenseBenefit	$ (0.1)us-gaap_IncomeTaxExpenseBenefit	$ 2.8us-gaap_IncomeTaxExpenseBenefit	$ 5.1us-gaap_IncomeTaxExpenseBenefit	$ 0us-gaap_IncomeTaxExpenseBenefit	$ (1.6)us-gaap_IncomeTaxExpenseBenefit