Acquisition - Summary of Proforma Financial Information (Details) - Inmarsat Holdings [Member] - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Total revenues	$ 1,070,021	$ 3,415,480	$ 3,084,753
Net income (loss) attributable to Viasat, Inc.	$ (33,972)	$ (922,451)	$ (297,647)