Basis of Presentation - Summary of Minority Interest (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Net income (loss) attributable to Viasat, Inc.	$ (48,240)	$ 3,291	$ (69,804)	$ 20,259
TrellisWare [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Net income (loss) attributable to Viasat, Inc.	(48,240)	3,291	(69,804)	20,259
Transfers to noncontrolling interest	(11,783)		(11,783)
Change from net income (loss) attributable to Viasat, Inc. and transfers from (to) noncontrolling interest	$ (60,023)	$ 3,291	$ (81,587)	$ 20,259