Acquisition - Summary of Proforma Financial Information (Details) - Inmarsat Holdings [Member] - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Business Acquisition [Line Items]
Total revenues	$ 1,070,322	$ 2,286,941	$ 2,014,732
Net income (loss) attributable to Viasat, Inc.	$ (40,986)	$ (802,594)	$ (263,675)