Accumulated Other Comprehensive (Loss) Income - Changes by Component (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 03, 2021	Mar. 28, 2020
AOCI Attributable to Parent
Beginning Balance	$ 1,346.9	$ 1,166.2
OCI before reclassifications	6.5	(27.4)
Amounts reclassified from AOCI	0.0	(2.5)
Net current-period OCI	6.5	(29.9)
Ending Balance	1,336.7	1,480.7
Gains and Losses on Derivative Instruments
AOCI Attributable to Parent
Beginning Balance	0.0	11.2
OCI before reclassifications	0.0	(8.7)
Amounts reclassified from AOCI	0.0	(2.5)
Net current-period OCI	0.0	(11.2)
Ending Balance	0.0	0.0
Pension Benefit Plan Items
AOCI Attributable to Parent
Beginning Balance	(1.1)	(1.0)
OCI before reclassifications	0.0	0.0
Amounts reclassified from AOCI	0.0	0.0
Net current-period OCI	0.0	0.0
Ending Balance	(1.1)	(1.0)
Currency Translation Adjustment Items
AOCI Attributable to Parent
Beginning Balance	(85.6)	(78.7)
OCI before reclassifications	6.5	(18.7)
Amounts reclassified from AOCI	0.0	0.0
Net current-period OCI	6.5	(18.7)
Ending Balance	(79.1)	(97.4)
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent
Beginning Balance	(86.7)	(68.5)
Ending Balance	$ (80.2)	$ (98.4)