CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net sales	$ 690.5	$ 1,306.9	$ 1,524.1	$ 2,443.5
Cost of goods sold	(583.4)	(1,035.1)	(1,280.3)	(1,933.9)
Gross profit	107.1	271.8	243.8	509.6
Selling, general and administrative expenses	(99.7)	(145.8)	(243.5)	(283.9)
Income (loss) from operations	7.4	126.0	0.3	225.7
Other income (expense)
Interest income	0.8	1.8	1.7	3.5
Interest expense	(16.5)	(24.6)	(34.2)	(47.6)
Other income (expense) – net	2.1	(1.3)	0.5	(4.5)
Income (loss) from continuing operations before income taxes	(6.2)	101.9	(31.7)	177.1
(Provision for) benefit from income taxes	3.0	(20.3)	3.8	(38.3)
Income (loss) from continuing operations	(3.2)	81.6	(27.9)	138.8
Income (loss) from discontinued operations – net of tax	(1.0)	(17.3)	(1.2)	(141.7)
Gain (loss) on disposition of discontinued operations – net of tax	(5.0)	10.8	(5.0)	11.4
Net income (loss)	$ (9.2)	$ 75.1	$ (34.1)	$ 8.5
Basic earnings (loss) per share:
Income (loss) from continuing operations	$ (0.05)	$ 1.14	$ (0.40)	$ 1.96
Income (loss) from discontinued operations – net of tax	(0.01)	(0.24)	(0.02)	(2.00)
Gain (loss) on disposition of discontinued operations – net of tax	(0.07)	0.15	(0.07)	0.16
Net income (loss)	(0.13)	1.05	(0.49)	0.12
Diluted earnings (loss) per share:
Income (loss) from continuing operations	(0.05)	1.14	(0.40)	1.93
Income (loss) from discontinued operations – net of tax	(0.01)	(0.24)	(0.02)	(1.97)
Gain (loss) on disposition of discontinued operations – net of tax	(0.07)	0.15	(0.07)	0.16
Net income (loss)	$ (0.13)	$ 1.05	$ (0.49)	$ 0.12
Weighted average number of shares outstanding in per share calculation
Basic (in shares)	69.3	71.2	69.9	70.9
Diluted (in shares)	69.3	71.7	69.9	71.8
Comprehensive income (loss)	$ 9.7	$ 74.9	$ (71.4)	$ 6.0