Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 26, 2021	Mar. 27, 2021	Jun. 27, 2020	Mar. 28, 2020	Jun. 26, 2021	Jun. 27, 2020
Net Income Per Common Share [Line Items]
Net income (loss)	$ 35.6	$ 45.3	$ 63.8	$ (7.8)	$ 80.9	$ 56.0
Basic weighted-average shares	49.8		49.0		49.6	49.0
Common equivalent shares:
Effect of dilutive securities	3.3		0.2		3.4	0.2
Diluted weighted-average shares	53.1		49.2		53.0	49.2
Basic earnings (loss) per share	$ 0.71		$ 1.30		$ 1.63	$ 1.14
Diluted earnings (loss) per share	$ 0.67		$ 1.30		$ 1.53	$ 1.14
Excluded anti-dilutive shares	2.5		4.7		2.7	4.4