Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 80.3	$ 67.4	$ 175.3	$ 161.2
Other comprehensive income (loss):
Foreign currency translation adjustments	(28.6)	(26.5)	(56.1)	(17.6)
Reclassification of foreign currency translation adjustments into earnings	0.0	0.0	0.0	0.0
Net change in pension and post-retirement liabilities	(1.0)	(0.5)	(4.4)	(2.8)
Reclassification of pension and post-retirement benefit losses into earnings	2.0	1.3	6.2	4.0
Change in fair value of available-for-sale marketable equity securities	1.4	1.0	1.8	2.1
Net change in fair value of cash flow hedges	(10.2)	(2.8)	(14.6)	(6.8)
Reclassification of cash flow hedge losses into earnings	3.2	1.0	9.4	4.9
Other comprehensive income (loss) before income taxes	(33.2)	(26.5)	(57.7)	(16.2)
Income tax (expense) benefit	2.3	0.5	1.4	0.4
Other comprehensive income (loss), net of tax	(30.9)	(26.0)	(56.3)	(15.8)
Comprehensive income	$ 49.4	$ 41.4	$ 119.0	$ 145.4