CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Net sales	$ 734.8	$ 772.3	$ 2,210.5	$ 2,445.6
Operating costs and expenses:
Cost of sales	478.5	494.4	1,441.1	1,557.4
Selling, general and administrative	168.7	166.8	532.5	532.6
Acquisition-related and integration charges	2.7	0.2	10.3	3.7
Restructuring charges, net	0.0	1.6	22.6	6.1
Operating profit	84.9	109.3	204.0	345.8
Other income (expense):
Interest income	0.6	0.6	1.3	1.9
Interest expense	(14.4)	(11.7)	(41.3)	(35.0)
Miscellaneous income (expense), net	4.3	(4.5)	10.6	3.9
Nonoperating income (expense), total	(9.5)	(15.6)	(29.4)	(29.2)
Income before income taxes	75.4	93.7	174.6	316.6
Provision for income taxes	18.8	21.1	40.4	70.5
Net income before allocation to noncontrolling interests	56.6	72.6	134.2	246.1
Less: Noncontrolling interest in subsidiaries’ earnings	0.0	0.1	0.0	0.2
Net income attributable to common shareholders	$ 56.6	$ 72.5	$ 134.2	$ 245.9
Earnings per share:
Basic (in dollars per share)	$ 0.97	$ 1.21	$ 2.30	$ 4.11
Diluted (in dollars per share)	$ 0.97	$ 1.19	$ 2.28	$ 4.05
Average shares outstanding:
Average basic shares outstanding	58.1	60.0	58.4	59.9
Average diluted shares outstanding	58.5	60.8	58.9	60.8
Dividends per share (in dollars per share)	$ 0.43	$ 0.39	$ 1.29	$ 1.17