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)
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1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2017
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Aug. 31, 2016
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Dec. 31, 2015
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Sep. 30, 2015
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Mar. 31, 2017
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Mar. 31, 2016
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Dec. 31, 2014
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Dec. 31, 2016
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Aug. 31, 2015
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Debt Instrument [Line Items]                  
Outstanding principal $ 13,186,000,000       $ 13,186,000,000        
Long-term Debt 13,354,000,000       13,354,000,000     $ 8,018,000,000  
Borrowings of debt         1,844,000,000 $ 335,000,000      
Braves Holdings Mixed Use Facility Credit Facilities Total                  
Debt Instrument [Line Items]                  
Outstanding principal $ 104,000,000       $ 104,000,000        
Effective interest rate 2.97%       2.97%        
Braves Holdings Entertainment Credit Facility                  
Debt Instrument [Line Items]                  
Outstanding principal $ 15,000,000       $ 15,000,000        
Effective interest rate 4.23%       4.23%        
Braves Holdings                  
Debt Instrument [Line Items]                  
Area of land acquired (in acres) | a             82    
Number of credit facilities | item         2        
Braves Holdings | Braves Holdings Term Loan                  
Debt Instrument [Line Items]                  
Debt issuance amount   $ 130,000,000              
Debt Instrument, Description of Variable Rate Basis       LIBOR          
Effective interest rate 2.03%       2.03%        
Braves Holdings | Braves Holdings Revolving Credit Facilities Total                  
Debt Instrument [Line Items]                  
Effective interest rate 1.78%       1.78%        
Braves Holdings | Braves Holdings Entertainment Credit Facility                  
Debt Instrument [Line Items]                  
Debt Instrument, Description of Variable Rate Basis   LIBOR              
Debt Instrument, Basis Spread on Variable Rate   3.25%              
Line of Credit Facility, Maximum Borrowing Capacity   $ 30,000,000              
Extension Options on Credit Facilities | item   1              
Braves Holdings | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Line of Credit Facility, Maximum Borrowing Capacity $ 185,000,000       $ 185,000,000        
Braves Holdings | Revolving Credit Facility | Braves Holdings Term Loan                  
Debt Instrument [Line Items]                  
Debt instrument, unused borrowing capacity, fee, percent       0.35%          
Braves Holdings | Revolving Credit Facility | Braves Holdings Revolving Credit Facility One                  
Debt Instrument [Line Items]                  
Line of Credit Facility, Maximum Borrowing Capacity $ 85,000,000       85,000,000       $ 250,000,000
Braves Holdings | Term Loan [Member] | Braves Holdings Term Loan                  
Debt Instrument [Line Items]                  
Debt issuance amount       $ 345,000,000          
Braves Holdings | Senior Notes | Braves Holdings Senior Secured Notes                  
Debt Instrument [Line Items]                  
Debt issuance amount   $ 200,000,000              
Debt Instrument, Interest Rate, Stated Percentage   3.77%              
Braves Holdings | Cobb County Major League Baseball Ballpark                  
Debt Instrument [Line Items]                  
Expected cost of new facility         672,000,000        
Construction and Development Costs         $ 653,000,000        
Lease term         30 years        
Property, Plant and Equipment, Useful Life 45 years                
Braves Holdings | Cobb County Major League Baseball Ballpark | Revolving Credit Facility | Braves Holdings Term Loan and Revolving Credit Facilities                  
Debt Instrument [Line Items]                  
Long-term Debt $ 101,000,000       $ 101,000,000        
Braves Holdings | Cobb County Ballpark Mixed Use Development                  
Debt Instrument [Line Items]                  
Expected cost of new facility         558,000,000        
Construction and Development Costs         354,000,000        
Proceeds from equity issuance to fund new facility         200,000,000        
Proceeds from debt issuance to fund new facility         $ 290,000,000        
Braves Holdings | Cobb County Ballpark Mixed Use Development | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Debt Instrument, Description of Variable Rate Basis         LIBOR        
Number of credit facilities | item     3            
Line of Credit Facility, Maximum Borrowing Capacity     $ 207,000,000            
Extension Options on Credit Facilities | item         2        
Shares pledged as collateral under loan | shares 464       464        
Share value $ 45,000,000       $ 45,000,000        
Braves Holdings | Other Costs And Equipment                  
Debt Instrument [Line Items]                  
Construction and Development Costs         50,000,000        
Braves Holdings | Cobb Marietta Coliseum And Exhibit Hall Authority [Member] | Cobb County Major League Baseball Ballpark                  
Debt Instrument [Line Items]                  
Due from Affiliates $ 392,000,000       392,000,000        
Braves Holdings | Affiliated Entities | Cobb County Ballpark Mixed Use Development                  
Debt Instrument [Line Items]                  
Construction and Development Costs         490,000,000        
Braves Holdings | The Authority                  
Debt Instrument [Line Items]                  
Related Party Transaction, Amounts of Transaction       103,000,000          
Braves Holdings | The Authority | Cobb Marietta Coliseum And Exhibit Hall Authority [Member] | Cobb County Major League Baseball Ballpark                  
Debt Instrument [Line Items]                  
Fair Value of Assets Acquired         $ 378,000,000        
Cobb Marietta Coliseum And Exhibit Hall Authority [Member] | Cobb County Major League Baseball Ballpark | Bonds Payable                  
Debt Instrument [Line Items]                  
Debt issuance amount       $ 368,000,000          
Minimum | Braves Holdings | Braves Holdings Term Loan                  
Debt Instrument [Line Items]                  
Debt Instrument, Basis Spread on Variable Rate       1.50%          
Minimum | Braves Holdings | Cobb County Ballpark Mixed Use Development | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Debt Instrument, Basis Spread on Variable Rate         2.00%        
Maximum | Braves Holdings | Braves Holdings Term Loan                  
Debt Instrument [Line Items]                  
Debt Instrument, Basis Spread on Variable Rate       1.75%          
Maximum | Braves Holdings | Cobb County Ballpark Mixed Use Development | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Debt Instrument, Basis Spread on Variable Rate         2.60%