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)
$ in Millions
12 Months Ended
Dec. 31, 2014
a
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Debt Instrument      
Long term Debt.   $ 14,039 $ 13,388
Braves Holdings      
Debt Instrument      
Area of land acquired (in acres) | a 82    
Long term Debt.   $ 480 494
Braves Holdings | Term Loan      
Debt Instrument      
Weighted average interest rate   4.11%  
Long term Debt.   $ 52 52
Braves Holdings | Senior Secured Notes      
Debt Instrument      
Weighted average interest rate   3.77%  
Long term Debt.   $ 192 195
Braves Holdings | Floating Rate Notes      
Debt Instrument      
Weighted average interest rate   4.50%  
Long term Debt.   $ 69 70
Braves Holdings | Revolving Credit Facility | Operating Credit Facilities      
Debt Instrument      
Weighted average interest rate   3.49%  
Long term Debt.   $ 7 17
Line of Credit Facility, Maximum Borrowing Capacity   $ 185  
Braves Holdings | Revolving Credit Facility | Mixed Use Credit Facilities and Loans      
Debt Instrument      
Weighted average interest rate   4.53%  
Long term Debt.   $ 160 $ 160
Line of Credit Facility, Maximum Borrowing Capacity   $ 298  
Braves Holdings | Revolving Credit Facility | Spring Training Credit Facility      
Debt Instrument      
Weighted average interest rate   3.57%  
Line of Credit Facility, Maximum Borrowing Capacity   $ 40