Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Net Income Per Common Share [Line Items]
Net income	$ 36.9	$ 35.7
Weighted average shares of common stock outstanding	48.7	51.1
Common equivalent shares:
Assumed exercise of dilutive options, restricted shares, restricted stock units and performance share units	0.1	0.2
Weighted average common and common equivalent shares outstanding	48.8	51.3
Basic earnings per share	$ 0.76	$ 0.70
Diluted earnings per share	$ 0.76	$ 0.70
Shares excluded from the determination of potential common stock because inclusion would have been anti-dilutive	3.9	2.0