Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Foreign currency translation adjustments, tax (expense) benefit	$ 7.9	$ 7.2	$ (1.6)
Net gains (losses) on hedging instruments, tax benefit	3.3	25.7	1.0
Net pension and other post-retirement benefits, tax (expense) benefit	$ (4.1)	$ 56.9	$ (81.8)