Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets (Goodwill Rollforward) (Details)

v3.8.0.1
Goodwill and Other Intangible Assets (Goodwill Rollforward) (Details) - USD ($)
$ in Millions
12 Months Ended
Apr. 18, 2016
Dec. 31, 2017
Dec. 31, 2016
Goodwill [Roll Forward]      
Goodwill, Beginning Balance   $ 14,345 $ 14,345
Acquisitions   4,038  
Other    
Goodwill, Ending Balance   18,383 14,345
Business acquisition      
Purchase Price   1,647  
SIRIUS XM      
Goodwill [Roll Forward]      
Goodwill, Beginning Balance   14,165 14,165
Acquisitions   82  
Other    
Goodwill, Ending Balance   14,247 14,165
Formula 1      
Goodwill [Roll Forward]      
Acquisitions   3,956  
Goodwill, Ending Balance   3,956  
Corporate And Other      
Goodwill [Roll Forward]      
Goodwill, Beginning Balance   180 180
Other    
Goodwill, Ending Balance   $ 180 $ 180
Automatic Labs Inc. | SIRIUS XM      
Goodwill [Roll Forward]      
Acquisitions $ 82    
Business acquisition      
Purchase Price $ 108