Quarterly report pursuant to Section 13 or 15(d)

Acquisitions (Details)

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Acquisitions (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
9 Months Ended
Jan. 23, 2017
Jan. 20, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Nov. 08, 2016
Business Acquisition [Line Items]            
Investments in and loans to cost and equity investees     $ 403 $ 760    
Borrowings of debt     2,310 5,820    
Long-term debt     13,380   $ 13,186  
Outstanding principal     13,152      
Delta Topco            
Business Acquisition [Line Items]            
Economic interest acquired 100.00%          
Enterprise Value $ 8,000          
Equity Value of Acquired Business 4,400          
Consideration Amount 4,700          
Payments to Acquire Businesses, Gross 3,050          
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned 1,600          
Formula One Group            
Business Acquisition [Line Items]            
Investments in and loans to cost and equity investees     6 8    
Borrowings of debt     288 $ 1,599    
Long-term debt     5,265      
Consideration payable $ 400          
Outstanding principal     4,951      
Common Class C | Formula One Group            
Business Acquisition [Line Items]            
Newly issued shares 62          
Value of shares issued to third parties $ 1,550          
Shares Issued, Price Per Share $ 25.00          
Common Class C | Formula One Group | Delta Topco            
Business Acquisition [Line Items]            
Newly issued shares 56          
Live Nation Margin Loan            
Business Acquisition [Line Items]            
Line of Credit Facility, Maximum Borrowing Capacity           $ 500
Borrowings of debt   $ 350        
Line of Credit Facility, Remaining Borrowing Capacity     $ 150      
Debt Instrument, Face Amount           $ 500
Liberty 1% Cash Convertible Notes Due 2023            
Business Acquisition [Line Items]            
Borrowings of debt $ 450          
Debt Instrument, Face Amount $ 450          
Debt Instrument, Interest Rate, Stated Percentage 1.00%          
Liberty 1% Cash Convertible Notes Due 2023 | Delta Topco            
Business Acquisition [Line Items]            
Consideration payable $ 400