Basis of Presentation - Summary of Minority Interest (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Net income (loss) attributable to Viasat, Inc.	$ (124,399)	$ (42,228)	$ (968,641)	$ (112,032)
Change from net income (loss) attributable to Viasat, Inc. and transfers from (to) noncontrolling interest	$ (124,399)	$ (42,228)	$ (968,641)	(123,815)
TrellisWare [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Transfers to noncontrolling interest				$ (11,783)