Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 29, 2018	Mar. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 125.4	$ 141.7
Changes in other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	13.6	3.4
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	(0.6)	(0.4)
Unrealized foreign exchange loss on intercompany loan, net of tax effect of ($0.4) and ($0.2) for three months ended, respectively	1.6	1.0
Total other comprehensive income	14.6	4.0
Total comprehensive income	$ 140.0	$ 145.7