CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 142.1	$ 133.5
Other comprehensive income (loss) before tax:
Change in cumulative translation adjustments	88.4	59.6
Net change in cash flow hedges	(2.6)	(1.2)
Net change in unrealized components of defined benefit plans	1.7	1.2
Other comprehensive income, before tax	87.5	59.6
Tax effect allocated to other comprehensive income	(0.5)	(0.4)
Other comprehensive income, net of tax	87.0	59.2
Comprehensive income	229.1	192.7
Less: Comprehensive income attributable to non-controlling interest	4.0	0.3
Comprehensive income attributable to controlling interest	$ 225.1	$ 192.4