Quarterly Operating Results (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 29, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jul. 01, 2016	Apr. 01, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 981.9	$ 994.0	$ 943.1	$ 918.2	$ 910.0	$ 924.5	$ 1,021.2	$ 1,002.7	$ 3,837.2	$ 3,858.4	$ 4,514.5
Gross profit	97.4	109.2	100.9	118.6	74.1	102.9	119.2	110.9	426.1	407.1	432.4
Net income (loss) including noncontrolling interest	15.8	(14.2)	(68.7)	12.4	(103.7)	(13.7)	28.3	(4.4)	(54.7)	(93.5)	(135.8)
Less: net income (loss) attributable to noncontrolling interest	(0.2)	0.0	2.1	0.0	0.9	0.6	(1.5)	0.3	1.9	0.3	(13.9)
Net income (loss) attributable to Company common shareholders	16.0	(14.2)	(70.8)	12.4	(104.6)	(14.3)	29.8	(4.7)	$ (56.6)	$ (93.8)	$ (121.9)
Net income (loss) attributable to Company common shareholders — for diluted EPS computation	$ 16.0	$ (14.2)	$ (70.8)	$ 12.4	$ (104.6)	$ (14.3)	$ 29.8	$ (4.7)
Earnings (loss) per common share - basic (usd per share)	$ 0.32	$ (0.28)	$ (1.42)	$ 0.25	$ (2.10)	$ (0.29)	$ 0.60	$ (0.10)	$ (1.13)	$ (1.89)	$ (2.49)
Earnings (loss) per common share - assuming dilution (usd per share)	$ 0.31	$ (0.28)	$ (1.42)	$ 0.24	$ (2.10)	$ (0.29)	$ 0.57	$ (0.10)	$ (1.13)	$ (1.89)	$ (2.49)