Accumulated Other Comprehensive Income/(Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	$ (107.8)	$ 18.0	$ (53.3)	$ 11.6
Other comprehensive income (loss) before reclassifications	38.5	17.7	(16.0)	23.0
Amounts reclassified from accumulated other comprehensive income - net of tax		1.2		2.3
Net current-period other comprehensive income (loss)	38.5	18.9	(16.0)	25.3
Balance at the end of the period	(69.3)	36.9	(69.3)	36.9
Foreign Currency Translation
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(103.9)	20.9	(51.7)	11.4
Other comprehensive income (loss) before reclassifications	38.0	16.9	(14.2)	26.4
Net current-period other comprehensive income (loss)	38.0	16.9	(14.2)	26.4
Balance at the end of the period	(65.9)	37.8	(65.9)	37.8
Other
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(3.9)	(2.9)	(1.6)	0.2
Other comprehensive income (loss) before reclassifications	0.5	0.8	(1.8)	(3.4)
Amounts reclassified from accumulated other comprehensive income - net of tax		1.2		2.3
Net current-period other comprehensive income (loss)	0.5	2.0	(1.8)	(1.1)
Balance at the end of the period	$ (3.4)	$ (0.9)	$ (3.4)	$ (0.9)