Document and Entity Information	6 Months Ended
	Oct. 03, 2014	Oct. 31, 2014
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Oct. 03, 2014
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Trading Symbol	VSAT
Entity Registrant Name	VIASAT INC
Entity Central Index Key	0000797721
Current Fiscal Year End Date	--04-03
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		46,922,317