Chapter 11 Bankruptcy Proceedings Combined Cash Flow (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Net loss $ (1,957,698) $ (1,649,599) $ (765,249)  
Adjustments to reconcile net loss to net cash (used in) provided by operating activities 1,391,565 1,621,281 1,328,968  
Net cash (used in) provided by operating activities (628,716) (192,451) 353,183  
Payments to Acquire Property, Plant, and Equipment (612,161) (620,895) (953,882)  
(Payments) proceeds related to 2013 sale of towers, net (39,618) 721,404 0  
Payments for (Proceeds from) Investments (1,637,913) (2,360,529) (1,678,918)  
Transfers To Restricted Cash   41,709 11,969  
Net cash used in investing activities (347,538) (177,612) (1,055,160)  
Other, net (632) (27,950) (124,723)  
Net cash (used in) provided by financing activities (128,272) 776,591 (238,295)  
Cash and Cash Equivalents, Period Increase (Decrease) (1,156,735) 365,382 (917,202)  
Cash and Cash Equivalents, at Carrying Value 573,600 1,730,335 1,364,953 2,282,155
Chapter 11 Entities [Member]        
Net loss (1,957,698)      
Adjustments to reconcile net loss to net cash (used in) provided by operating activities 1,606,769      
Net cash (used in) provided by operating activities (350,929)      
Payments to Acquire Property, Plant, and Equipment (7,012)      
(Payments) proceeds related to 2013 sale of towers, net 32,390      
Payments for (Proceeds from) Investments 198,007      
Intercompany Payments, Investing Activities (542,000)      
Investments In And Advances To Non-Debtor Subsidiaries (124,532)      
Transfers from restricted cash 25,300      
Net cash used in investing activities (417,847)      
Repayments of Long-term Capital Lease Obligations (42,414)      
Other, net (396)      
Net cash (used in) provided by financing activities (42,810)      
Cash and Cash Equivalents, Period Increase (Decrease) (811,586)      
Cash and Cash Equivalents, at Carrying Value $ 321,690 $ 1,133,276