Basis of Presentation - Summary of Minority Interest (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Net income (loss) attributable to Viasat, Inc.	$ (42,228)	$ (6,613)	$ (112,032)	$ 13,646
TrellisWare [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Net income (loss) attributable to Viasat, Inc.	(42,228)	(6,613)	(112,032)	13,646
Transfers to noncontrolling interest	0		(11,783)
Change from net income (loss) attributable to Viasat, Inc. and transfers from (to) noncontrolling interest	$ (42,228)	$ (6,613)	$ (123,815)	$ 13,646