CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - 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	$ 677.9	$ 841.6	$ 1,475.7	$ 1,673.3
Operating costs and expenses:
Cost of sales	451.7	535.0	962.5	1,063.0
Selling, general and administrative	169.6	179.8	364.0	365.8
Acquisition-related and integration charges	2.3	2.4	7.5	3.5
Restructuring charges, net	23.8	1.6	22.6	4.5
Operating profit	30.5	122.8	119.1	236.5
Other income (expense):
Interest income	0.3	0.7	0.7	1.3
Interest expense	(14.4)	(11.4)	(26.9)	(23.3)
Miscellaneous income, net	2.5	6.4	6.3	8.4
Nonoperating income (expense), total	(11.6)	(4.3)	(19.9)	(13.6)
Income before income taxes	18.9	118.5	99.2	222.9
Provision for income taxes	4.1	27.5	21.6	49.4
Net income before allocation to noncontrolling interests	14.8	91.0	77.6	173.5
Less: Noncontrolling interest in subsidiaries’ earnings	0.0	0.0	0.0	0.1
Net income attributable to common shareholders	$ 14.8	$ 91.0	$ 77.6	$ 173.4
Earnings per share:
Basic (in dollars per share)	$ 0.26	$ 1.52	$ 1.33	$ 2.90
Diluted (in dollars per share)	$ 0.25	$ 1.50	$ 1.31	$ 2.85
Average shares outstanding:
Average basic shares outstanding	58.0	59.9	58.5	59.8
Average diluted shares outstanding	58.5	60.8	59.1	60.8
Dividends per share (in dollars per share)	$ 0.43	$ 0.39	$ 0.86	$ 0.78