Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (7.1)	$ (152.3)	$ (103.8)	$ (184.1)
Net unrealized gains (losses) on derivative financial instruments:
Net holding gains (losses) arising during the period	0.0	(2.2)	0.0	0.9
Reclassification adjustment for net realized gains recorded in net loss	0.0	(3.1)	0.0	(6.7)
Total net unrealized losses on derivative financial instruments	0.0	(5.3)	0.0	(5.8)
Net pension adjustments:
Liability adjustments for defined benefit plans	0.3	(4.4)	(1.8)	(4.4)
Reclassification adjustment for defined benefit plans recorded in net loss	0.5	1.5	3.0	1.8
Total net pension adjustments	0.8	(2.9)	1.2	(2.6)
Net foreign currency translation:
Unrealized foreign currency translation losses	0.0	(3.1)	(0.8)	(6.6)
Reclassification adjustment of cumulative translation adjustments	0.0	0.0	75.8	0.0
Total net foreign currency translation	0.0	(3.1)	75.0	(6.6)
Total other comprehensive income (loss), net of tax	0.8	(11.3)	76.2	(15.0)
Comprehensive loss	$ (6.3)	$ (163.6)	$ (27.6)	$ (199.1)