CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Net sales	$ 1,024.6	$ 1,098.8	$ 3,468.1	$ 3,468.4
Cost of goods sold	(815.0)	(858.7)	(2,748.9)	(2,721.1)
Gross profit	209.6	240.1	719.2	747.3
Selling, general and administrative expenses	(123.2)	(135.9)	(407.1)	(416.4)
Income (loss) from operations	86.4	104.2	312.1	330.9
Other income (expense)
Interest income	1.9	1.7	5.4	7.0
Interest expense	(22.0)	(18.4)	(69.6)	(52.5)
Other income (expense) – net	1.6	(3.7)	(2.9)	(4.1)
Income (loss) from continuing operations before income taxes	67.9	83.8	245.0	281.3
(Provision for) benefit from income taxes	(15.5)	(14.6)	(53.8)	(59.2)
Income (loss) from continuing operations	52.4	69.2	191.2	222.1
Income (loss) from discontinued operations – net of tax	(10.1)	(30.8)	(151.8)	(80.2)
Gain (loss) on disposition of discontinued operations – net of tax	(20.9)	0.2	(9.5)	4.8
Net income (loss)	$ 21.4	$ 38.6	$ 29.9	$ 146.7
Basic earnings (loss) per share:
Income (loss) from continuing operations	$ 0.73	$ 0.94	$ 2.69	$ 2.91
Income (loss) from discontinued operations – net of tax	(0.14)	(0.42)	(2.14)	(1.05)
Gain (loss) on disposition of discontinued operations – net of tax	(0.29)	0	(0.13)	0.06
Net income (loss)	0.30	0.52	0.42	1.92
Diluted earnings (loss) per share:
Income (loss) from continuing operations	0.73	0.92	2.66	2.85
Income (loss) from discontinued operations – net of tax	(0.14)	(0.41)	(2.11)	(1.03)
Gain (loss) on disposition of discontinued operations – net of tax	(0.29)	0	(0.13)	0.06
Net income (loss)	$ 0.30	$ 0.51	$ 0.42	$ 1.88
Weighted average number of shares outstanding in per share calculation
Basic (in shares)	71.3	73.7	71.0	76.3
Diluted (in shares)	71.8	75.1	71.8	77.9
Comprehensive income (loss)	$ 8.4	$ 22.5	$ 14.4	$ 81.9