Selected Quarterly Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Oct. 02, 2020	Jul. 03, 2020	Apr. 03, 2020	Dec. 31, 2019	Sep. 27, 2019	Jun. 28, 2019	Mar. 29, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Sales	$ 732.3	$ 640.5	$ 362.0	$ 547.2	$ 720.5	$ 659.3	$ 712.1	$ 659.7	$ 2,282.0	$ 2,751.6	$ 2,844.5
Gross profit	388.5	340.7	150.5	278.4	389.4	367.0	393.6	363.1	1,158.1	1,513.1	1,601.8
Net income	$ 108.4	$ 35.6	$ (93.5)	$ (17.2)	$ 56.1	$ 62.1	$ 61.5	$ 37.9	$ 33.3	$ 217.6	$ 230.7
Net earnings per share:
Basic (in USD per share)	$ 0.68	$ 0.22	$ (0.59)	$ (0.11)	$ 0.35	$ 0.48	$ 0.48	$ 0.30	$ 0.21	$ 1.60	$ 1.80
Diluted (in USD per share)	$ 0.64	$ 0.22	$ (0.59)	$ (0.11)	$ 0.35	$ 0.48	$ 0.48	$ 0.30	$ 0.20	$ 1.60	$ 1.80