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. 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
Net other comprehensive income/(loss)	23.4					23.4
Treasury stock issued	0.0		(15.0)	15.0
Stock-based compensation	10.9		10.9
Exercise of stock options	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	179.9
Net other comprehensive income/(loss)	25.0
Ending balance at Jun. 30, 2019	2,473.0	0.4	352.4	(115.2)	2,703.6	(468.2)
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
Net other comprehensive income/(loss)	1.6					1.6
Treasury stock issued	0.0		(14.7)	14.7
Stock-based compensation	6.8		6.8
Exercise of stock options	10.5		10.5
Ending balance at Jun. 30, 2019	2,473.0	0.4	352.4	(115.2)	2,703.6	(468.2)
Beginning balance at Dec. 29, 2019	2,714.7	0.4	360.5	(96.4)	2,926.0	(475.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	82.2				82.2
Net other comprehensive income/(loss)	(63.7)					(63.7)
Treasury stock issued	0.0		(9.4)	9.4
Stock-based compensation	9.6		9.6
Exercise of stock options	10.2		10.2
Ending balance at Mar. 29, 2020	2,753.0	0.4	370.9	(87.0)	3,008.2	(539.5)
Beginning balance at Dec. 29, 2019	2,714.7	0.4	360.5	(96.4)	2,926.0	(475.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	175.9
Net other comprehensive income/(loss)	(55.2)
Ending balance at Jun. 28, 2020	2,879.9	0.4	376.2	(67.6)	3,101.9	(531.0)
Beginning balance at Mar. 29, 2020	2,753.0	0.4	370.9	(87.0)	3,008.2	(539.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	93.7				93.7
Net other comprehensive income/(loss)	8.5					8.5
Treasury stock issued	0.0		(19.4)	19.4
Stock-based compensation	6.7		6.7
Exercise of stock options	18.0		18.0
Ending balance at Jun. 28, 2020	$ 2,879.9	$ 0.4	$ 376.2	$ (67.6)	$ 3,101.9	$ (531.0)