Accumulated Other Comprehensive Income (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Components of accumulated other comprehensive income (loss), net of tax
Balance at beginning of period	$ 182.4
Other comprehensive income (loss)	2.8
Balance at end of period	185.2
Foreign Currency Translation
Components of accumulated other comprehensive income (loss), net of tax
Balance at beginning of period	197.6
Other comprehensive income (loss)	2.9
Balance at end of period	200.5
Pension Liability Adjustment
Components of accumulated other comprehensive income (loss), net of tax
Balance at beginning of period	(15.2)
Other comprehensive income (loss)	(0.1)
Balance at end of period	$ (15.3)