Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 43.5	$ 24.9
Other comprehensive income (loss):
Foreign currency translation adjustments	15.9	9.5
Net change in pension and post-retirement liabilities	(2.3)	(1.9)
Reclassification of pension and post-retirement benefit losses into earnings	1.9	1.8
Change in fair value of available-for-sale marketable equity securities	0.8	(0.1)
Net change in fair value of cash flow hedges	6.4	2.3
Reclassification of cash flow hedge (gains) losses into earnings	(3.0)	4.8
Other comprehensive income before income taxes	19.7	16.4
Income tax expense	(1.1)	(2.4)
Other comprehensive income, net of tax	18.6	14.0
Comprehensive income	$ 62.1	$ 38.9