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Commitments and Contingencies (Details)
$ in Millions
1 Months Ended 3 Months Ended
Feb. 13, 2018
claim
Aug. 07, 2017
USD ($)
Feb. 14, 2017
patent
Nov. 30, 2017
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Satellite-related obligations            
Other Commitments [Line Items]            
Satellite-related obligations         $ 703 $ 732
Elbit | Hughes Network Systems | Subsidiaries            
Other Commitments [Line Items]            
Damages awarded   $ 21   $ 29    
Attorney's fees sought value         14  
Loss contingency accrual         $ 3 $ 3
Realtime Data LLC | Hughes Network Systems | Echo Star Corporation            
Other Commitments [Line Items]            
Patents allegedly infringed | patent     4      
Patent 728 | Realtime Data LLC            
Other Commitments [Line Items]            
Pending claims validity challenged | claim 1