Condensed Consolidated Statements of Comprehensive Income or Loss (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 18.3	$ 16.6	$ 89.8	$ 34.0
Foreign currency translation:
Net unrealized gain (loss) arising during the period	35.8	(1.5)	(130.2)	(7.6)
Derivative instruments:
Net unrealized loss arising during the period	(0.9)	(0.3)	(0.8)	(0.9)
Reclassification of net loss into earnings	0.2	0.0	0.2	0.2
Defined benefit plans:
Net unrealized gain arising during the period	0.0	3.7	0.0	3.7
Reclassification of net loss (gain) into earnings	0.6	(4.2)	1.3	(3.9)
Other comprehensive income (loss)	35.7	(2.3)	(129.5)	(8.5)
Comprehensive income (loss)	$ 54.0	$ 14.3	$ (39.7)	$ 25.5