Accumulated Other Comprehensive Loss Changes in Accumulated Other Comprehensive Loss (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
BALANCE AT DECEMBER 31, 2014	$ (164.3)
Other comprehensive income (loss) before reclassifications	(22.6)
Amounts reclassified from accumulated other comprehensive loss	1.2
Current period other comprehensive income (loss)	(21.4)
BALANCE AT MARCH 31, 2015	(185.7)
Cash flow hedge (loss) gain
Accumulated Other Comprehensive Income (Loss) [Line Items]
BALANCE AT DECEMBER 31, 2014	0
Other comprehensive income (loss) before reclassifications	1.2
Amounts reclassified from accumulated other comprehensive loss	(0.5)
Current period other comprehensive income (loss)	0.7
BALANCE AT MARCH 31, 2015	0.7
Unrealized gain (loss) on available-for- sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
BALANCE AT DECEMBER 31, 2014	0.3
Other comprehensive income (loss) before reclassifications	0
Amounts reclassified from accumulated other comprehensive loss	0
Current period other comprehensive income (loss)	0
BALANCE AT MARCH 31, 2015	0.3
Pension and post retirement benefit plan adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
BALANCE AT DECEMBER 31, 2014	(124.7)
Other comprehensive income (loss) before reclassifications	0
Amounts reclassified from accumulated other comprehensive loss	1.7
Current period other comprehensive income (loss)	1.7
BALANCE AT MARCH 31, 2015	(123.0)
Cumulative translation adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
BALANCE AT DECEMBER 31, 2014	(39.9)
Other comprehensive income (loss) before reclassifications	(23.8)
Amounts reclassified from accumulated other comprehensive loss	0
Current period other comprehensive income (loss)	(23.8)
BALANCE AT MARCH 31, 2015	$ (63.7)