Accumulated Other Comprehensive Income (Details 2) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Components of accumulated other comprehensive income (loss), net of tax
Balance at beginning of period	$ 182.4
Other comprehensive income (loss) before reclassifications	(0.7)
Balance at end of period	181.7
Foreign Currency Translation
Components of accumulated other comprehensive income (loss), net of tax
Balance at beginning of period	197.6
Other comprehensive income (loss) before reclassifications	(0.6)
Balance at end of period	197.0
Pension Liability Adjustment
Components of accumulated other comprehensive income (loss), net of tax
Balance at beginning of period	(15.2)
Other comprehensive income (loss) before reclassifications	(0.1)
Balance at end of period	$ (15.3)