v3.3.1.900
Income Taxes (Table 4) (Details) - USD ($)
$ in Millions
Dec. 31, 2014
Dec. 31, 2013
Deferred tax assets:    
Net operating loss and other carryforwards $ 6,637.9 $ 7,286.1
Property and equipment, net 3,469.2 3,470.7
Debt 1,189.0 837.7
Derivative instruments 345.9 518.4
Intangible assets 149.6 187.5
Other future deductible amounts 265.3 265.0
Deferred tax assets 12,056.9 12,565.4
Valuation allowance (6,679.4) (7,052.8)
Deferred tax assets, net of valuation allowance 5,377.5 5,512.6
Deferred tax liabilities:    
Intangible assets (2,338.2) (1,471.1)
Property and equipment, net (1,861.4) (1,945.3)
Investments (367.6) (400.7)
Derivative instruments (142.7) (129.5)
Other future taxable amounts (160.3) (253.8)
Deferred tax liabilities (4,870.2) (4,200.4)
Net deferred tax asset $ 507.3 $ 1,312.2