UNAUDITED CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE LOSS - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Statement of Comprehensive Income [Abstract]
Net (loss) earnings	$ (14.4)	$ 4.6	$ (30.6)	$ (50.2)
Other comprehensive (loss) income, net of tax:
Currency translation adjustment	(4.0)	(4.4)	(7.8)	(4.8)
Pension liability adjustments:
Currency translation on pension liabilities	0.0	0.6	(0.1)	0.3
Amortization of cumulative loss	0.4	0.0	1.1	0.0
Deferred income taxes on pension liability	(0.1)	0.0	(0.3)	0.0
Total pension liability, net of tax	0.3	0.6	0.7	0.3
Other comprehensive loss	(3.7)	(3.8)	(7.1)	(4.5)
Comprehensive (loss) income	$ (18.1)	$ 0.8	$ (37.7)	$ (54.7)