Quarterly report pursuant to Section 13 or 15(d)

Investments In Available-For-Sale Securities And Other Cost Investments - Text (Details)

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Investments In Available-For-Sale Securities And Other Cost Investments - Text (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 07, 2016
Mar. 31, 2017
Sep. 30, 2016
Oct. 27, 2016
Dec. 31, 2015
Schedule of Investments [Line Items]          
Investments in and loans to cost and equity investees     $ (762)    
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax     0   $ 0
Formula 1          
Schedule of Investments [Line Items]          
Investment ownership percentage 20.00%        
Investments in and loans to cost and equity investees $ (746)        
Payments to Acquire Investments, gross 821        
Investment Discount 75        
Diluted investment ownership percentage       19.10%  
Acquisition transaction price 8,000        
Enterprise Value 8,000        
Equity Value of Acquired Business $ 4,400        
Formula 1 | Forecast          
Schedule of Investments [Line Items]          
Business Acquisition, Percentage of Voting Interests Acquired   100.00%      
Payments to Acquire Businesses, Gross   $ 1,100      
Liberty Media Group          
Schedule of Investments [Line Items]          
Investments in and loans to cost and equity investees     $ (749)    
Liberty Media Group | Forecast | Common Class C          
Schedule of Investments [Line Items]          
Stock Issued During Period, Shares, Period Increase (Decrease)   138      
Liberty Media Group | Formula 1          
Schedule of Investments [Line Items]          
Investment ownership percentage 20.00%        
Diluted investment ownership percentage       19.10%  
Liberty Media Group | Formula 1 | Forecast          
Schedule of Investments [Line Items]          
Business Acquisition, Percentage of Voting Interests Acquired   100.00%      
Seller Ownership Percentage in Liberty Media   65.00%      
Delta Topco | Forecast | Exchangeable Debt          
Schedule of Investments [Line Items]          
Debt Instrument, Face Amount   $ 351