Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Braves Holdings Notes (Details)

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Long-Term Debt - Braves Holdings Notes (Details)
shares in Thousands, $ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2018
USD ($)
shares
Mar. 31, 2017
USD ($)
Dec. 31, 2014
a
Dec. 31, 2017
USD ($)
Debt Instrument [Line Items]        
Outstanding principal $ 14,009      
Long-term Debt 14,113     $ 13,954
Borrowings of debt $ 1,317 $ 1,844    
Mixed Use Credit Facilities | Time Warner Inc        
Debt Instrument [Line Items]        
Shares pledged as collateral under loan | shares 375      
Share value $ 35      
Braves Holdings        
Debt Instrument [Line Items]        
Area of land acquired (in acres) | a     82  
Long-term Debt $ 603     667
Braves Holdings | Floating Rate Notes        
Debt Instrument [Line Items]        
Effective interest rate 3.51%      
Long-term Debt $ 74     75
Braves Holdings | Other        
Debt Instrument [Line Items]        
Long-term Debt $ 17      
Braves Holdings | Revolving Credit Facility | Operating Credit Facilities        
Debt Instrument [Line Items]        
Effective interest rate 2.58%      
Long-term Debt $ 28     98
Line of Credit Facility, Maximum Borrowing Capacity $ 185      
Braves Holdings | Revolving Credit Facility | Mixed Use Credit Facilities        
Debt Instrument [Line Items]        
Effective interest rate 3.95%      
Long-term Debt $ 208     200
Line of Credit Facility, Maximum Borrowing Capacity $ 237      
Braves Holdings | Revolving Credit Facility | Spring Training Credit Facility        
Debt Instrument [Line Items]        
Effective interest rate 2.75%      
Long-term Debt $ 25     39
Line of Credit Facility, Maximum Borrowing Capacity $ 40      
Braves Holdings | Term Loan | Term Loan        
Debt Instrument [Line Items]        
Effective interest rate 3.51%      
Long-term Debt $ 54     55
Braves Holdings | Senior Notes | Senior Secured Notes        
Debt Instrument [Line Items]        
Effective interest rate 3.77%      
Long-term Debt $ 197     $ 200