Components of Accumulated Comprehensive Income (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Other Comprehensive Income [Abstract]
Accumulated pension and OPEB liability adjustments, net of income tax of $21.7 million and $21.0 million at June 30, 2015 and December 31, 2014, respectively	$ 39.7	$ 38.4
Accumulated unrealized loss on derivative instruments, net of income tax of $0.3 million and $0.0 million at June 30, 2015 and December 31, 2014, respectively	(14.4)	(8.3)
Accumulated unrealized foreign currency translation adjustments	(65.6)	(29.8)
Accumulated other comprehensive loss	(119.7)	(76.5)
Accumulated pension and OPEB tax	21.7	21.0
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Tax	$ 0.3	$ 0.0