Quarterly report pursuant to Section 13 or 15(d)

Investments In Affiliates Accounted For Using The Equity Method - Sirius XM Canada (Details)

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Investments In Affiliates Accounted For Using The Equity Method - Sirius XM Canada (Details)
shares in Millions, CAD in Millions, $ in Millions
3 Months Ended 9 Months Ended
May 25, 2017
CAD
Sep. 30, 2017
USD ($)
Sep. 30, 2016
USD ($)
Sep. 30, 2017
USD ($)
shares
Sep. 30, 2016
USD ($)
May 25, 2017
USD ($)
Dec. 31, 2016
USD ($)
Schedule of Equity Method Investments [Line Items]              
Gain (Loss) On Dilution Of Investment In Affiliate       $ 4 $ (2)    
Deferred revenue   $ 2,179   2,179     $ 1,877
SIRIUS XM              
Schedule of Equity Method Investments [Line Items]              
Due to Related Parties, Current   3   3      
Due to Related Parties, Noncurrent   7   7      
Due from Related Parties, Current   12   12      
Cash Dividends Paid to Parent Company       95      
SIRIUS XM | Sirius XM Canada              
Schedule of Equity Method Investments [Line Items]              
Revenue from Related Parties   $ 23 $ 11 63 32    
Percentage ownership 70.00%         70.00%  
Equity Method Investment Voting Interest 33.00%            
Payments to Acquire Equity Method Investments       130      
Equity method investment consideration transferred       $ 309      
Issuance of common stock related to investment in Sirius XM Canada (in shares) | shares       35      
Equity method investment, consideration transferred, equity interests issued and issuable       $ 179      
Equity Method Investment, Number of Preferred Shares Owned | shares       591      
SIRIUS XM | Sirius XM Canada | Services Agreement              
Schedule of Equity Method Investments [Line Items]              
Related Party Transaction, Period Of Agreement 30 years            
SIRIUS XM | Sirius XM Canada | Services Agreement, Years 1 through 5              
Schedule of Equity Method Investments [Line Items]              
Related Party Transaction, Payments Receivable, Percent of Gross Revenue 25.00%            
SIRIUS XM | Sirius XM Canada | Services Agreement, Years 6 through 30              
Schedule of Equity Method Investments [Line Items]              
Related Party Transaction, Payments Receivable, Percent of Gross Revenue 30.00%            
SIRIUS XM | Sirius XM Canada | Advisory Services Agreement              
Schedule of Equity Method Investments [Line Items]              
Related Party Transaction, Period Of Agreement 30 years            
Related Party Transaction, Payments Receivable, Percent of Gross Revenue 5.00%            
SIRIUS XM | Sirius XM Canada | Related Party 7.62% Loan              
Schedule of Equity Method Investments [Line Items]              
Notes Receivable, Related Parties, Noncurrent           $ 131  
Notes receivable, related parties, maturity period 15 years            
Related Party Transaction, Rate 7.62%            
Notes Receivable, Related Parties, Annual Principal Repayment Period 60 days            
Notes Receivable, Related Parties, Annual Prepayment Excess Cash Threshold | CAD CAD 10            
Sirius XM Canada              
Schedule of Equity Method Investments [Line Items]              
Cash Dividends Paid to Parent Company       $ 4 $ 8