Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2017	Sep. 29, 2016	Sep. 28, 2017	Sep. 29, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 147.2	$ 145.1	$ 232.1	$ 361.5
Changes in other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	13.1	(7.8)	31.2	(38.8)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	(0.6)	0.4	(1.5)	1.4
Unrealized foreign exchange loss on intercompany loan, net of tax effect of ($0.4) and $0.8 for three months ended, respectively, and ($0.6) and $1.1 for the six months ended, respectively	1.3	(1.1)	3.9	(5.5)
Total other comprehensive income (loss)	13.8	(8.5)	33.6	(42.9)
Total comprehensive income	$ 161.0	$ 136.6	$ 265.7	$ 318.6