Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Unrealized gain (loss) on cash flow hedge, income taxes	$ (2.3)	$ 0.0	$ 0.0
Unrealized gain on available-for-sale securities, income taxes	0.1	0.2	0.2
Foreign currency translation adjustment, income taxes	(220.0)	(227.9)	(62.3)
Defined benefit pension and postemployment plans adjustment, income taxes	$ 2.8	$ (15.5)	$ 14.1