Quarterly report pursuant to Section 13 or 15(d)

Basis Of Presentation (Narrative) (Details)

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Basis Of Presentation (Narrative) (Details) (USD $)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended 1 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Oct. 31, 2013
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Dec. 31, 2013
Lease Agreements [Member]
Jan. 18, 2013
Noncontrolling Interest [Member]
Jan. 18, 2013
SIRIUS XM [Member]
Sep. 30, 2013
SIRIUS XM [Member]
Sep. 30, 2013
SIRIUS XM [Member]
Sep. 30, 2012
SIRIUS XM [Member]
Sep. 30, 2013
SIRIUS XM [Member]
Sep. 30, 2012
SIRIUS XM [Member]
Jan. 18, 2013
FCC licences [Member]
SIRIUS XM [Member]
Sep. 30, 2012
Pro Forma [Member]
Sep. 30, 2012
Pro Forma [Member]
Dec. 31, 2012
Pro Forma [Member]
SIRIUS XM [Member]
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination                 $ 10,372,000,000                  
Business Acquisition, Cost of Acquired Entity, Other Noncash Consideration                 253,000,000                  
Revenue, Net   1,110,000,000 154,000,000 2,977,000,000 324,000,000           959,000,000 0 2,626,000,000 0   1,019,000,000 2,827,000,000  
Assets, Current   2,481,000,000   2,481,000,000   2,211,000,000                       4,039,000,000
ownership percentage acquired                 50.00%                  
Related Party Costs   6,000,000 4,000,000 15,000,000 7,000,000                          
Related Party Transaction, Amounts of Transaction             3,000,000                      
Purchase of shares in equity method investee                 50,000,000                  
Business Acquisition, Cost of Acquired Entity, Cash Paid                 161,000,000                  
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value               10,286,000,000 10,841,000,000                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net                 21,466,000,000                  
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain                   7,500,000,000                
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value                 10,215,000,000                  
Preferred Stock, Par or Stated Value Per Share   $ 0.01   $ 0.01   $ 0.01     $ 0.001                  
Convertible Preferred Stock, Shares Issued upon Conversion                 1,293,509,076                  
Business Acquisition, Purchase Price Allocation, Current Assets, Cash and Cash Equivalents                 569,000,000                  
Business Acquisition, Purchase Price Allocation, Current Assets, Receivables                 210,000,000                  
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment                 1,714,000,000                  
Business Acquisition, Purchase Price Allocation, Goodwill Amount                 14,003,000,000                  
Business Acquisition, Purchase Price Allocation, Intangible Assets Not Amortizable                 930,000,000           8,600,000,000      
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets                 930,000,000                  
Business Acquisition, Purchase Price Allocation, Current Assets, Prepaid Expense and Other Assets                 480,000,000                  
Business Acquisition, Purchase Price Allocation, Noncurrent Liabilities, Long-term Debt                 (2,490,000,000)                  
Business Acquisition, Purchase Price Allocation, Current Liabilities, Deferred Revenue                 (1,565,000,000)                  
Business Acquisition, Purchase Price Allocation, Other Liabilities                 (1,004,000,000)                  
Business Acquisition, Purchase Price Allocation, Deferred Taxes Asset (Liability), Net, Noncurrent                 (911,000,000)                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangibles                 21,466,000,000                  
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners                 50.00%                  
Investments in affiliates, accounted for using the equity method   3,363,000,000   3,363,000,000   3,341,000,000         274,000,000   274,000,000         851,000,000
Property, Plant and Equipment, Net   1,792,000,000   1,792,000,000   157,000,000                       1,871,000,000
Indefinite Lived Intangible Assets Total   23,876,000,000   23,876,000,000   344,000,000                       23,877,000,000
Finite-Lived Intangible Assets, Net   964,000,000   964,000,000   108,000,000                       1,038,000,000
Other Assets, Noncurrent   192,000,000   192,000,000   32,000,000                       1,939,000,000
Assets   33,943,000,000   33,943,000,000   8,325,000,000         28,295,000,000   28,295,000,000         33,615,000,000
Long-term Debt   4,881,000,000   4,881,000,000   0                       2,486,000,000
Deferred Tax Liabilities, Net                                   2,933,000,000
Other Liabilities                                   3,656,000,000
Noncontrolling interests in equity of subsidiaries   9,560,000,000   9,560,000,000   (8,000,000)                       10,833,000,000
Operating Income (Loss)   248,000,000 10,000,000 625,000,000 (20,000,000)                     185,000,000 536,000,000  
Interest Expense   (39,000,000) (1,000,000) (78,000,000) (6,000,000)                     (47,000,000) (153,000,000)  
Income (Loss) from Equity Method Investments   (8,000,000) 14,000,000 (12,000,000) 1,307,000,000                     (17,000,000) (33,000,000)  
Net Income (Loss) Attributable to Noncontrolling Interest   40,000,000 (1,000,000) 144,000,000 1,000,000                     26,000,000 1,655,000,000  
Net Income (Loss) Attributable to Parent   76,000,000 221,000,000 8,228,000,000 1,308,000,000                     171,000,000 1,923,000,000  
Income (Loss) from Continuing Operations, Per Basic Share                               $ 1.44 $ 16.03  
Income (Loss) from Continuing Operations, Per Diluted Share                               $ 1.39 $ 15.51  
Stockholders' Equity Attributable to Parent   14,419,000,000   14,419,000,000   6,440,000,000                       13,707,000,000
Treasury Stock, Shares, Retired 6,300,000                                  
Proceeds from Divestiture of Businesses $ 417,000,000