Reconciliation of Federal Tax Rate to Effective Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Taxes computed at the federal rate	$ (256.9)	$ (167.3)	$ 0.5
State and local income taxes, net of federal tax benefit	(26.8)	(20.6)	(2.0)
Valuation allowance	171.5	74.5	0.5
Foreign earnings taxed at different rate	(5.3)	(11.2)	(6.6)
Adjustment to prior years’ taxes	3.4	(5.4)	0.1
Tax reserve adjustments	3.1	3.9	(0.5)
Repatriation of foreign earnings	2.1	13.4	0.3
Other	2.0	0.6	(1.0)
Income tax benefit from continuing operations	$ (106.9)	$ (112.1)	$ (8.7)