Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net Income (loss)	$ 31.7	$ (19.5)	$ 42.0	$ (54.0)
Other comprehensive income (loss)
Foreign currency translation adjustments	4.1	(0.1)	10.2	(7.9)
Unrealized loss on investments, net of tax	(0.2)	0.0	(0.2)	0.0
Change benefit obligations, translation adjustment	0.1	0.0	(0.9)	0.3
Amortization of amounts included in net periodic benefit cost, net of tax	0.8	1.0	1.9	2.3
Other	0.0	0.0	0.0	0.1
Other comprehensive income (loss)	4.8	0.9	11.0	(5.2)
Comprehensive income (loss)	36.5	(18.6)	53.0	(59.2)
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member]
Other comprehensive income (loss)
Amortization of amounts included in net periodic benefit cost, net of tax	0.0	0.0	0.1	0.1
Other comprehensive income (loss)	0.0	0.0	0.1	0.1
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
Other comprehensive income (loss)
Amortization of amounts included in net periodic benefit cost, net of tax	0.8	1.0	1.8	2.2
Other comprehensive income (loss)	$ 0.9	$ 1.0	$ 0.9	$ 2.5