Supplementary Data - Selected Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 1,068.7	$ 904.3	$ 941.1	$ 861.8	$ 950.0	$ 890.5	$ 921.6	$ 823.8	$ 3,775.9	$ 3,585.9	$ 2,542.3
Gross profit	439.6	371.1	399.9	378.4	396.0	375.1	380.6	356.0	1,589.0	1,507.7	991.9
Net (loss) income attributable to stockholders	(141.5)	(69.2)	(61.1)	(24.4)	(1.9)	71.8	(8.8)	(134.8)	(296.2)	(73.7)	(308.6)
Net (loss) income attributable to common stockholders	$ (141.5)	$ (69.2)	$ (61.1)	$ (24.4)	$ (1.9)	$ 104.7	$ (8.8)	$ (134.8)	$ (296.2)	$ (40.8)	$ (308.6)
(Loss) earnings per share
Basic (in dollars per share)	$ (0.49)	$ (0.24)	$ (0.21)	$ (0.09)	$ (0.01)	$ 0.45	$ (0.04)	$ (0.59)	$ (1.04)	$ (0.17)	$ (1.52)
Diluted (in dollars per share)	$ (0.49)	$ (0.24)	$ (0.21)	$ (0.09)	$ (0.01)	$ (0.15)	$ (0.04)	$ (0.59)	$ (1.04)	$ (0.65)	$ (1.52)