Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Gain (loss) on forward-starting interest rate swap, income taxes	$ 0.5	$ 16.4	$ (19.9)	$ 14.6
Unrealized gain on available-for-sale securities, income taxes	0.0	0.0	0.0	0.1
Foreign currency translation adjustment, income taxes	(61.0)	81.5	(2.8)	(94.3)
Defined benefit pension and postemployment plans adjustment, income taxes	$ 1.2	$ 1.5	$ 2.4	$ 3.0