Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Net Income Per Common Share [Line Items]
Net income (loss)	$ (7.8)	$ 36.9
Weighted-average shares of common stock outstanding	48.9	48.7
Common equivalent shares:
Assumed exercise of dilutive options, restricted shares, restricted stock units and performance share units	0.0	0.1
Weighted-average common and common equivalent shares outstanding	48.9	48.8
Basic earnings per share	$ (0.16)	$ 0.76
Diluted earnings per share	$ (0.16)	$ 0.76
Shares excluded from the determination of potential common stock because inclusion would have been anti-dilutive	4.2	3.9