Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - 6 months ended Jun. 30, 2016 - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Beginning Balance at Dec. 31, 2015	$ 918.5	$ 0.2	$ 2,410.7	$ (371.7)	$ (503.4)	$ (618.9)	$ 1.6
Net loss	(400.6)	0.0	0.0	0.0	(400.6)	0.0	1.7
Net loss	(398.9)
Net realized losses on cash flow hedges (net of $52.3 net tax provision)	89.1	0.0	0.0	0.0	0.0	89.1	0.0
Postretirement plans and workers’ compensation obligations (net of $4.2 net tax provision)	7.2	0.0	0.0	0.0	0.0	7.2	0.0
Foreign currency translation adjustment	0.9	0.0	0.0	0.0	0.0	0.9	0.0
Share-based compensation for equity-classified awards	4.2	0.0	4.2	0.0	0.0	0.0	0.0
Repurchase of employee common stock relinquished for tax withholding	(0.1)	0.0	0.0	(0.1)	0.0	0.0	0.0
Distributions to noncontrolling interests	(0.4)	0.0	0.0	0.0	0.0	0.0	(0.4)
Ending Balance at Jun. 30, 2016	$ 620.5	$ 0.2	$ 2,414.9	$ (371.8)	$ (904.0)	$ (521.7)	$ 2.9