Accumulated Other Comprehensive Income (Loss) (Change in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Apr. 01, 2016
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ 168.9	$ 242.9
Other comprehensive income (loss) before reclassifications	8.7	20.8
Amounts reclassified from accumulated other comprehensive income (loss)	0.8	11.8
Net current - period other comprehensive income (loss)	9.5	32.6
Ending Balance	181.0	261.6
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(286.4)	(340.2)
Ending Balance	(276.9)	(307.6)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(228.2)	(275.6)
Other comprehensive income (loss) before reclassifications	8.7	20.8
Amounts reclassified from accumulated other comprehensive income (loss)	0.0	10.5
Net current - period other comprehensive income (loss)	8.7	31.3
Ending Balance	(219.5)	(244.3)
Change of Fair Value of Pension Benefit Obligation [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(58.2)	(64.6)
Other comprehensive income (loss) before reclassifications	0.0	0.0
Amounts reclassified from accumulated other comprehensive income (loss)	0.8	1.3
Net current - period other comprehensive income (loss)	0.8	1.3
Ending Balance	$ (57.4)	$ (63.3)