Accumulated Other Comprehensive Loss Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
BALANCE AT DECEMBER 31, 2012	$ (164.3)	$ (71.0)	$ (119.1)
Other comprehensive income (loss) before Reclassifications	(67.0)	(94.7)	40.1
Amounts reclassified from accumulated other comprehensive loss	7.1	1.4	8.0
Other comprehensive (loss) income	(59.9)	(93.3)	48.1
BALANCE AT DECEMBER 31, 2015	(224.2)	(164.3)	(71.0)
Cash Flow Hedge (Loss) Gain
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
BALANCE AT DECEMBER 31, 2012	0.0	(0.2)	(0.5)
Other comprehensive income (loss) before Reclassifications	1.7	0.9	0.6
Amounts reclassified from accumulated other comprehensive loss	(0.3)	(0.7)	(0.3)
Other comprehensive (loss) income	1.4	0.2	0.3
BALANCE AT DECEMBER 31, 2015	1.4	0.0	(0.2)
Unrealized Gain (Loss) on Available-for-Sale Securities
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
BALANCE AT DECEMBER 31, 2012	0.3	0.4	0.7
Other comprehensive income (loss) before Reclassifications	(0.3)	(0.1)	(0.3)
Amounts reclassified from accumulated other comprehensive loss	0.0	0.0	0.0
Other comprehensive (loss) income	(0.3)	(0.1)	(0.3)
BALANCE AT DECEMBER 31, 2015	0.0	0.3	0.4
Pension and Post Retirement Benefit Plan Adjustment
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
BALANCE AT DECEMBER 31, 2012	(124.7)	(67.0)	(130.1)
Other comprehensive income (loss) before Reclassifications	(22.9)	(59.8)	54.8
Amounts reclassified from accumulated other comprehensive loss	7.4	2.1	8.3
Other comprehensive (loss) income	(15.5)	(57.7)	63.1
BALANCE AT DECEMBER 31, 2015	(140.2)	(124.7)	(67.0)
Cumulative Translation Adjustment
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
BALANCE AT DECEMBER 31, 2012	(39.9)	(4.2)	10.8
Other comprehensive income (loss) before Reclassifications	(45.5)	(35.7)	(15.0)
Amounts reclassified from accumulated other comprehensive loss	0.0	0.0	0.0
Other comprehensive (loss) income	(45.5)	(35.7)	(15.0)
BALANCE AT DECEMBER 31, 2015	$ (85.4)	$ (39.9)	$ (4.2)