Accumulated Other Comprehensive Income/(Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	$ (53.3)	$ 11.6
Other comprehensive income (loss) before reclassifications	(54.5)	5.3
Amounts reclassified from accumulated other comprehensive income - net of tax		1.1
Net current-period other comprehensive income (loss)	(54.5)	6.4
Balance at the end of the period	(107.8)	18.0
Foreign Currency Translation
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(51.7)	11.4
Other comprehensive income (loss) before reclassifications	(52.2)	9.5
Net current-period other comprehensive income (loss)	(52.2)	9.5
Balance at the end of the period	(103.9)	20.9
Other
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(1.6)	0.2
Other comprehensive income (loss) before reclassifications	(2.3)	(4.2)
Amounts reclassified from accumulated other comprehensive income - net of tax		1.1
Net current-period other comprehensive income (loss)	(2.3)	(3.1)
Balance at the end of the period	$ (3.9)	$ (2.9)