Shares Used In Computing Diluted Net Income (Loss) Per Share - Additional Information (Detail) - shares	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	111,663	220,095	242,973
PSOs and Market Condition PSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	1,930,376	0	0
RSU [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	2,699,376	5,539,871	2,066,973
Performance-Based Performance Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	175,721	165,498	0
Viasat 401(k) Profit Sharing Plan and Employee Stock Purchase Plan [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	1,226,647	1,950,692	1,127,606