Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt (Narrative) (Details)

v2.4.0.8
Long-Term Debt (Narrative) (Details) (USD $)
6 Months Ended 6 Months Ended 0 Months Ended 6 Months Ended 0 Months Ended 6 Months Ended 0 Months Ended 1 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Sirius XM credit facility
Dec. 31, 2013
Sirius XM credit facility
Jun. 30, 2014
Sirius XM credit facility, unused fee percentage
Jun. 30, 2014
1.375% Cash Convertible Senior Notes due 2023
Oct. 17, 2013
1.375% Cash Convertible Senior Notes due 2023
Apr. 30, 2013
$1 billion margin loan due 2014
Term loan
Jun. 30, 2014
$1 billion margin loan due 2014
Term loan
Apr. 30, 2013
$1 billion margin loan due 2014
Revolving Credit Facility
Jun. 30, 2014
$1 billion margin loan due 2014
Revolving Credit Facility
Jun. 30, 2014
$670 million margin loan due 2015
May 01, 2013
$670 million margin loan due 2015
May 31, 2014
Sirius XM 6.00% Senior Notes Due 2024 [Member]
Oct. 17, 2013
Common Class A
1.375% Cash Convertible Senior Notes due 2023
Oct. 17, 2013
1.375% Convertible Notes Bond Hedge Transaction
Oct. 17, 2013
1.375% Convertible Notes Bond Hedge Transaction
Common Class A
Jul. 23, 2014
Subsequent Event
Common Class A
1.375% Cash Convertible Senior Notes due 2023
Jul. 23, 2014
Subsequent Event
1.375% Convertible Notes Bond Hedge Transaction
Common Class A
Debt Instrument [Line Items]                                      
Debt face amount $ 5,933,000,000   $ 0       $ 1,000,000,000           $ 670,000,000 $ 1,500,000,000          
Debt Instrument, Interest Rate, Stated Percentage         0.30%   1.375%             6.00%          
Debt Instrument, Convertible, Conversion Ratio                             5.5882     15.7760  
Debt instrument, face amount per debenture             1,000                        
Debt instrument, convertible, threshold percentage of conversion price to stock price trigger           98.00%                          
conversion price for exchangeable debt                             $ 178.95     $ 63.39  
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger           130.00%                          
Forward contract, number of underlying shares                                 5,588,200   15,776,000
Payments for Derivative Instrument, Investing Activities                               299,000,000      
Borrowings of debt 1,948,000,000 2,809,000,000           250,000,000   450,000,000                  
Debt Instrument, Description of Variable Rate Basis                 LIBOR     LIBOR              
Debt Instrument, Basis Spread on Variable Rate                 2.00%     3.25%              
Line of Credit Facility, Remaining Borrowing Capacity     1,250,000,000               750,000,000                
Incremental borrowing capacity                     1,000,000,000                
Line of Credit Facility, Maximum Borrowing Capacity       $ 1,250,000,000