CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Revenues	$ 841.6	$ 851.0	$ 1,673.3	$ 1,650.0
Operating costs and expenses:
Cost of sales	535.0	545.6	1,063.0	1,066.8
Selling, general and administrative	179.8	188.9	365.8	366.5
Acquisition-related and integration charges	2.4	4.1	3.5	9.2
Restructuring charges	1.6	(0.6)	4.5	0.2
Operating profit	122.8	113.0	236.5	207.3
Other income (expense):
Interest income	0.7	0.4	1.3	1.2
Interest expense	(11.4)	(12.8)	(23.3)	(27.5)
Miscellaneous income	6.4	4.3	8.4	8.3
Nonoperating income (expense), total	(4.3)	(8.1)	(13.6)	(18.0)
Income before income taxes	118.5	104.9	222.9	189.3
Provision for income taxes	27.5	24.2	49.4	39.9
Net income before allocation to noncontrolling interests	91.0	80.7	173.5	149.4
Less: Noncontrolling interest in subsidiaries' earnings	0.0	0.0	0.1	0.0
Net income attributable to common shareholders	$ 91.0	$ 80.7	$ 173.4	$ 149.4
Earnings per share - basic: (a)
Net income attributable to common shareholders	$ 1.52	$ 1.35	$ 2.90	$ 2.50
Earnings per share - diluted: (a)
Net income attributable to common shareholders	$ 1.50	$ 1.32	$ 2.85	$ 2.45
Average basic shares outstanding	59.9	59.7	59.8	59.7
Average diluted shares outstanding	60.8	61.1	60.8	61.0
Dividends per share (in dollars per share)	$ 0.39	$ 0.35	$ 0.78	$ 0.70