Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 12.9	$ 69.3
Other comprehensive income:
Foreign currency translation adjustments	(20.3)	0.5
Reclassification of foreign currency translation adjustments into earnings	0.0	2.1
Net change in pension and post-retirement liabilities	(0.8)	(2.3)
Reclassification of pension and post-retirement benefit losses into earnings	1.5	2.0
Net change in fair value of cash flow hedges	(14.6)	6.2
Reclassification of cash flow hedge losses into earnings	1.2	2.4
Other comprehensive (loss) income before income taxes	(33.0)	10.9
Income tax expense (benefit)	3.7	(2.3)
Other comprehensive (loss) income, net of tax	(29.3)	8.6
Comprehensive (loss) income	$ (16.4)	$ 77.9