Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Condensed Consolidated Statements of Operations and Comprehensive (Loss) Income
Revenues	$ 1,177.8	$ 965.4	$ 2,118.7	$ 1,924.6
Cost of goods sold	870.1	695.3	1,566.1	1,385.1
Selling and administrative expenses	161.3	144.6	312.1	295.5
Research and development expenses	13.8	11.7	24.2	23.6
Other operating income, net	(1.2)	(0.7)	(2.2)	(1.3)
Operating income	133.8	114.5	218.5	221.7
Interest expense, net	19.2	19.7	38.4	38.7
Loss on extinguishment of debt	0.0	0.0	0.0	8.8
Interest income	(0.4)	(2.6)	(0.9)	(3.3)
Other non-operating expense (income), net	1.1	(0.7)	4.7	(0.9)
Income from continuing operations before income taxes	113.9	98.1	176.3	178.4
Provision for income taxes	19.8	22.1	33.1	37.6
Income from continuing operations	94.1	76.0	143.2	140.8
Discontinued operations:
Income (loss) before income taxes	6.3	(1.1)	10.8	(5.2)
Provision for (benefit from) income taxes	1.1	(0.5)	2.5	(1.6)
Income (loss) from discontinued operations	5.2	(0.6)	8.3	(3.6)
Net income	$ 99.3	$ 75.4	$ 151.5	$ 137.2
Basic earnings per share attributable to common shares:
Income from continuing operations (in dollars per share)	$ 1.79	$ 1.38	$ 2.71	$ 2.54
(Loss) income from discontinued operations (in dollars per share)	0.10	(0.01)	0.16	(0.07)
Basic earnings per share (in dollars per share)	1.89	1.37	2.87	2.47
Income from continuing operations (in dollars per share)	1.77	1.37	2.68	2.52
(Loss) income from discontinued operations (in dollars per share)	0.10	(0.01)	0.16	(0.07)
Diluted earnings per share (in dollars per share)	$ 1.87	$ 1.36	$ 2.84	$ 2.45
Average shares outstanding:
Basic (in shares)	52.3	54.8	52.7	55.3
Diluted (in shares)	53.0	55.2	53.3	55.8
Comprehensive income:
Net income	$ 99.3	$ 75.4	$ 151.5	$ 137.2
Other comprehensive income (loss), net of tax:
Foreign currency gains (losses)	6.8	7.8	(6.5)	(20.5)
Amortization of unrecognized net periodic benefit costs, net of tax	1.2	1.0	2.4	2.0
Other, net of tax	0.3	0.7	(1.7)	(17.5)
Other comprehensive income (loss)	8.3	9.5	(5.8)	(36.0)
Comprehensive income	$ 107.6	$ 84.9	$ 145.7	$ 101.2