Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2019	Sep. 27, 2018	Sep. 26, 2019	Sep. 27, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 131.3	$ 168.8	$ 462.4	$ 439.4
Foreign currency translation adjustments	(12.8)	0.0	(16.7)	(13.4)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	36.9	(0.6)	36.2	(1.8)
Unrealized foreign exchange loss on intercompany loan, net of tax effect of $0.2 and zero for the three months ended, respectively, and $0.3 and $0.3 for the nine months ended, respectively	(1.1)	0.0	(1.3)	(1.3)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	(1.5)		(1.5)
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	(2.0)	0.0		0.0
Total other comprehensive gain (loss)	21.5	(0.6)	16.7	(16.5)
Total comprehensive income	$ 152.8	$ 168.2	$ 479.1	$ 422.9