UNAUDITED CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE LOSS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014
Statement of Comprehensive Income [Abstract]
Net loss	$ (2.3)	$ (46.2)	$ (16.2)	$ (54.8)
Other comprehensive income (loss), net of tax:
Currency translation adjustment	2.3	2.1	(3.8)	(0.4)
Pension liability adjustments:
Currency translation on pension liabilities	0.0	(0.3)	(0.1)	(0.3)
Amortization of cumulative loss	0.3	0.0	0.7	0.0
Deferred income taxes on pension liability	0.1	0.0	(0.2)	0.0
Total pension liability, net of tax	0.4	(0.3)	0.4	(0.3)
Other comprehensive income (loss)	2.7	1.8	(3.4)	(0.7)
Comprehensive income (loss)	$ 0.4	$ (44.4)	$ (19.6)	$ (55.5)