Quarterly report pursuant to Section 13 or 15(d)

Recent Accounting Pronouncements - Revenue recognition - Performance obligations (Details)

v3.10.0.1
Recent Accounting Pronouncements - Revenue recognition - Performance obligations (Details)
$ in Millions
 9 Months Ended
Sep. 30, 2018
USD ($)
Jan. 01, 2018
USD ($)
Dec. 31, 2017
USD ($)
Deferred revenue      
Deferred revenue $ 2,235 $ 1,899 $ 1,941
Formula One Group      
Deferred revenue      
Deferred revenue 235    
Liberty Sirius XM Group      
Deferred revenue      
Deferred revenue 1,955    
Braves Group      
Deferred revenue      
Deferred revenue $ 45    
SIRIUS XM | Accounting Standards Update 2014-09 | Maximum      
Optional exemption      
Percent of total deferred revenue balance related to contracts that extend beyond one year 10    
SIRIUS XM | Liberty Sirius XM Group | Maximum      
Optional exemption      
Self-pay customers, audio subscriptions prepayment period 3 years    
SIRIUS XM | Liberty Sirius XM Group | Accounting Standards Update 2014-09      
Optional exemption      
Optional exemption utilized true    
SIRIUS XM | Liberty Sirius XM Group | Accounting Standards Update 2014-09 | Minimum      
Optional exemption      
Prepaid data trials, contract period 3 years    
SIRIUS XM | Liberty Sirius XM Group | Accounting Standards Update 2014-09 | Maximum      
Optional exemption      
Prepaid data trials, contract period 5 years    
Formula One and Braves Holdings      
Deferred revenue      
Deferred revenue $ 286 $ 59  
Formula One and Braves Holdings | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-01      
Remaining performance obligations      
Expected timing of satisfaction period 3 months    
Formula One and Braves Holdings | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01      
Remaining performance obligations      
Expected timing of satisfaction period 12 months    
Formula One and Braves Holdings | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01      
Remaining performance obligations      
Expected timing of satisfaction period 12 months    
Formula One and Braves Holdings | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01      
Remaining performance obligations      
Expected timing of satisfaction period 72 months    
Formula One and Braves Holdings | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01      
Remaining performance obligations      
Expected timing of satisfaction period 108 months