Quarterly report pursuant to Section 13 or 15(d)

Goodwill (Details)

v3.21.2
Goodwill (Details)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
USD ($)
Sep. 30, 2021
USD ($)
reporting_unit
Sep. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Apr. 23, 2021
USD ($)
Oct. 16, 2020
USD ($)
Dec. 31, 2008
USD ($)
Business Acquisition [Line Items]              
Number of reporting units | reporting_unit   2          
Goodwill $ 3,150,000,000 $ 3,150,000,000   $ 3,122,000,000      
Goodwill, impairment loss 0   $ 0        
Accumulated impairment of goodwill since the merger 5,722,000,000 5,722,000,000          
Stitcher              
Business Acquisition [Line Items]              
Goodwill           $ 224,000,000  
Goodwill, purchase accounting adjustments   6,000,000          
Series of Individually Immaterial Business Acquisitions              
Business Acquisition [Line Items]              
Goodwill         $ 22,000,000    
Sirius XM              
Business Acquisition [Line Items]              
Goodwill 2,290,000,000 2,290,000,000   2,290,000,000      
Accumulated impairment of goodwill since the merger             $ 4,766,000,000
Pandora              
Business Acquisition [Line Items]              
Goodwill $ 860,000,000 $ 860,000,000   832,000,000      
Goodwill, impairment loss       $ 956,000,000