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Commitments and Contingencies - Contingencies (Details)
$ in Millions
1 Months Ended
Feb. 13, 2018
claim
Aug. 07, 2017
USD ($)
Feb. 14, 2017
patent
Nov. 30, 2017
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Elbit | Hughes Satellite Systems Corporation (HSSC) | Hughes Network Systems            
Commitment and Contingencies            
Damages awarded   $ 21   $ 29    
Attorney's fees sought       $ 14    
Loss contingency accrual         $ 3 $ 3
Realtime Data LLC            
Commitment and Contingencies            
Patents allegedly infringed | patent     4      
Patent 728 | Realtime Data LLC            
Commitment and Contingencies            
Pending Claims validity challenged | claim 1