Basis of Presentation - Summary of Minority Interest (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Net income (loss) attributable to Viasat, Inc.	$ (767,238)	$ (48,240)	$ (844,242)	$ (69,804)
Change from net income (loss) attributable to Viasat, Inc. and transfers from (to) noncontrolling interest	$ (767,238)	(60,023)	$ (844,242)	(81,587)
TrellisWare [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Transfers to noncontrolling interest		$ (11,783)		$ (11,783)