Annual report pursuant to Section 13 and 15(d)

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

v3.10.0.1
Goodwill and Other Intangible Assets (Goodwill Rollforward) (Details) - USD ($)
$ in Millions
12 Months Ended
Apr. 18, 2016
Dec. 31, 2018
Dec. 31, 2017
Goodwill [Roll Forward]      
Goodwill, Beginning Balance   $ 18,383 $ 14,345
Acquisitions   3 4,038
Goodwill, Ending Balance   18,386 18,383
Business acquisition      
Purchase Price     1,647
SIRIUS XM      
Goodwill [Roll Forward]      
Goodwill, Beginning Balance   14,247 14,165
Acquisitions   3 82
Goodwill, Ending Balance   14,250 14,247
SIRIUS XM | Automatic Labs Inc.      
Goodwill [Roll Forward]      
Acquisitions $ 82    
Business acquisition      
Purchase Price $ 108    
Formula 1      
Goodwill [Roll Forward]      
Goodwill, Beginning Balance   3,956  
Acquisitions     3,956
Goodwill, Ending Balance   3,956 3,956
Corporate And Other      
Goodwill [Roll Forward]      
Goodwill, Beginning Balance   180 180
Goodwill, Ending Balance   $ 180 $ 180