Contingencies (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Dec. 31, 2019	Mar. 31, 2020
License Fee Dispute
Other Commitments [Line Items]
Total written assessments		$ 28.4
Payments for written assessments		2.9
Hughes Network Systems | Elbit
Other Commitments [Line Items]
Amount paid to other party	$ 33.0
Hughes Network Systems | License Fee Dispute
Other Commitments [Line Items]
Loss contingency accrual	$ 80.2	77.1
Additional License Fee | License Fee Dispute
Other Commitments [Line Items]
Total written assessments		4.0
Additional License Fee | Hughes Network Systems | License Fee Dispute
Other Commitments [Line Items]
Loss contingency accrual		3.8
Penalties | License Fee Dispute
Other Commitments [Line Items]
Total written assessments		4.1
Penalties | Hughes Network Systems | License Fee Dispute
Other Commitments [Line Items]
Loss contingency accrual		3.9
Interest and Interest on Penalties | License Fee Dispute
Other Commitments [Line Items]
Total written assessments		20.3
Interest and Interest on Penalties | Hughes Network Systems | License Fee Dispute
Other Commitments [Line Items]
Loss contingency accrual		$ 69.4