Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 186.6	$ 205.8	$ 171.8
Other comprehensive income (loss):
Foreign currency translation adjustments	(58.7)	(45.7)	(30.7)
Reclassification of foreign currency translation adjustments into earnings	0.0	0.0	(41.1)
Net change in pension and post-retirement benefit liabilities	5.7	(75.9)	56.7
Change in fair value of available-for-sale marketable equity securities	1.2	0.7	(6.8)
Net change in fair value of cash flow hedges	(18.4)	(12.1)	(6.8)
Reclassification of pension and post-retirement benefit losses into earnings	9.7	6.9	9.5
Reclassification of cash flow hedge losses into earnings	12.5	5.7	4.2
Other comprehensive income (loss) before taxes	(48.0)	(120.4)	(15.0)
Tax (expense) benefit	(3.2)	28.0	(23.8)
Other comprehensive income (loss), net of tax	(51.2)	(92.4)	(38.8)
Comprehensive income	$ 135.4	$ 113.4	$ 133.0