Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Narrative) (Details)

v2.4.0.8
Basis of Presentation (Narrative) (Details) (USD $)
 3 Months Ended 6 Months Ended 12 Months Ended 0 Months Ended 1 Months Ended 2 Months Ended 3 Months Ended 6 Months Ended 1 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2014
Lease Agreements
May 08, 2014
Liberty Broadband
Apr. 25, 2014
SIRIUS XM
Oct. 09, 2013
SIRIUS XM
Jan. 18, 2013
SIRIUS XM
Jun. 30, 2014
SIRIUS XM
Aug. 01, 2014
SIRIUS XM
Dec. 31, 2013
SIRIUS XM
Jun. 30, 2014
SIRIUS XM
Apr. 25, 2014
SIRIUS XM
Jul. 23, 2014
Common Class A
Jun. 30, 2014
Common Class A
Jul. 23, 2014
Series C
Subsequent Event
Entity Information [Line Items]                                  
Number of shares issued during the period for each share of Series A and Series B stock held by shareholders prior to the distribution                                 2
Related Party Transaction, Amounts of Transaction $ 6,000,000 $ 5,000,000 $ 8,000,000 $ 9,000,000 $ 3,000,000                        
Purchase of shares in equity method investee                 50,000,000                
Convertible Preferred Stock, Shares Issued upon Conversion                 1,293,509,076                
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions                         50.00%        
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain                 7,500,000,000                
Stock Repurchased and Retired During Period, Shares                       43,712,265   136,600,826      
Payments for Repurchase of Common Stock     0 140,000,000                   500,000,000      
Number of share repurchase tranches                           3      
Stock Repurchased and Retired During Period, Value             340,000,000             3.6603      
Stock Repurchase Program, Authorized Amount                     600,000,000            
Accelerated Share Repurchases, Adjustment to Recorded Amount                   600,000,000              
Stock Repurchased During Period, Shares                   112,500,000              
Stock Repurchase Program, Remaining Authorized Repurchase Amount                     246,000,000            
Class of Warrant or Right, Outstanding                             15,776,000 5,588,200  
Class of Warrant or Right, Exercise Price of Warrants or Rights                             87.35 255.64  
Share repurchases, discount from market price               1.50%                  
Volume weighted average price period           20 days   10 days                  
Volume weighted average share price, cap               4.18                  
Volume weighted average share price, floor               $ 3.64                  
Stock repurchased as a percentage of shares outstanding                           2.00%      
Number of shares received in spin-off           0.25                      
Common Stock, Shares Subscribed but Unissued           1                      
Subscription right basis           5                      
Subscription right discount           20.00%