Net Earnings Per Share (Components of Basic and Diluted Earnings per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2019	Sep. 28, 2018	Sep. 27, 2019	Sep. 28, 2018
Numerator
Net earnings	$ 62.1	$ 64.1	$ 161.5	$ 179.5
Denominator
Weighted average common shares outstanding used in basic and diluted EPS (in shares)	130.6	127.9	128.8	127.9
Basic and diluted EPS (in USD per share)	$ 0.48	$ 0.50	$ 1.25	$ 1.40