Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2017	$ 1,947.3	$ 0.4	$ 337.3	$ (200.7)	$ 2,139.6	$ (329.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	66.5				66.5
Other comprehensive income (loss), net of tax	19.9					19.9
Treasury stock issued	0.0		(20.4)	20.4
Stock-based compensation	6.6		6.6
Exercise of stock options and other	12.3		12.3
Ending balance at Apr. 01, 2018	2,055.9	0.4	335.8	(180.3)	2,257.0	(357.0)
Beginning balance at Dec. 31, 2017	1,947.3	0.4	337.3	(200.7)	2,139.6	(329.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	242.7
Other comprehensive income (loss), net of tax	(30.7)
Ending balance at Sep. 30, 2018	2,216.8	0.4	337.9	(146.4)	2,432.5	(407.6)
Beginning balance at Apr. 01, 2018	2,055.9	0.4	335.8	(180.3)	2,257.0	(357.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	85.9				85.9
Other comprehensive income (loss), net of tax	(57.1)					(57.1)
Treasury stock issued	0.0		(17.2)	17.2
Stock-based compensation	6.5		6.5
Exercise of stock options and other	11.6		11.6
Ending balance at Jul. 01, 2018	2,102.8	0.4	336.7	(163.1)	2,342.9	(414.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	90.3				90.3
Other comprehensive income (loss), net of tax	6.5					6.5
Treasury stock issued	0.0		(16.7)	16.7
Stock-based compensation	5.6		5.6
Exercise of stock options and other	12.3		12.3
Ending balance at Sep. 30, 2018	2,216.8	0.4	337.9	(146.4)	2,432.5	(407.6)
Beginning balance at Dec. 30, 2018	2,229.7	0.4	343.7	(144.9)	2,523.7	(493.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	75.3				75.3
Other comprehensive income (loss), net of tax	23.4					23.4
Treasury stock issued	0.0		(15.0)	15.0
Stock-based compensation	10.9		10.9
Exercise of stock options and other	10.2		10.2
Ending balance at Mar. 31, 2019	2,349.5	0.4	349.8	(129.9)	2,599.0	(469.8)
Beginning balance at Dec. 30, 2018	2,229.7	0.4	343.7	(144.9)	2,523.7	(493.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	286.6
Other comprehensive income (loss), net of tax	1.4
Ending balance at Sep. 29, 2019	2,571.0	0.4	356.7	(104.6)	2,810.3	(491.8)
Beginning balance at Mar. 31, 2019	2,349.5	0.4	349.8	(129.9)	2,599.0	(469.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	104.6				104.6
Other comprehensive income (loss), net of tax	1.6					1.6
Treasury stock issued	0.0		(14.7)	14.7
Stock-based compensation	6.8		6.8
Exercise of stock options and other	10.5		10.5
Ending balance at Jun. 30, 2019	2,473.0	0.4	352.4	(115.2)	2,703.6	(468.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	106.7				106.7
Other comprehensive income (loss), net of tax	(23.6)					(23.6)
Treasury stock issued	0.0		(10.6)	10.6
Stock-based compensation	6.4		6.4
Exercise of stock options and other	8.5		8.5
Ending balance at Sep. 29, 2019	$ 2,571.0	$ 0.4	$ 356.7	$ (104.6)	$ 2,810.3	$ (491.8)