Quarterly Results (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Data [Abstract]
Revenues	$ 837.5	$ 772.3	$ 841.6	$ 831.7	$ 839.6	$ 855.8	$ 851.0	$ 799.1	$ 3,283.1	$ 3,345.5	$ 2,786.0
Cost of sales	548.1	494.4	535.0	526.6	544.6	544.8	545.6	521.2	2,104.1	2,156.2	1,770.9
Gross profit	289.4	277.9	306.6	305.1	295.0	311.0	305.4	277.9	1,179.0	1,189.3
Operating profit from continuing operations	(135.4)	109.3	122.8	113.7	110.1	123.9	113.0	94.3	210.4	441.3	388.4
Net income attributable to common shareholders	$ (112.6)	$ 72.5	$ 91.0	$ 82.4					$ 133.3	335.6	$ 171.8
Income from continuing operations attributable to common shareholders					$ 89.2	$ 97.0	$ 80.7	$ 68.7		$ 335.6
Earnings per diluted share
Basic earnings per share (in dollars per share)	$ (1.89)	$ 1.21	$ 1.52	$ 1.38	$ 1.51	$ 1.62	$ 1.35	$ 1.15	$ 2.23	$ 5.63	$ 2.89
Diluted earnings per share (in dollars per share)	$ (1.89)	$ 1.19	$ 1.50	$ 1.36	$ 1.46	$ 1.59	$ 1.32	$ 1.13	$ 2.20	$ 5.50	$ 2.84
Asbestos provision	$ 229.0								$ 229.0	$ 0.0	$ 0.0
Environmental provision, net	18.9								18.9	0.0	0.0
Acquisition related costs	1.5	$ 0.2	$ 2.4	$ 1.1	$ 8.4	$ 2.1	$ 4.1	$ 5.2
Restructuring charges	$ 11.4	$ 1.6	$ 1.6	$ 2.9	1.8	5.2	(0.6)	0.8	$ 17.5	7.2	$ 13.0
Inventory step-up and backlog amortization					$ 0.3	$ 0.3	$ 1.9	$ 6.6		$ 9.1