Amount of transactions with related party during the financial reporting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 57
-Paragraph 2
-Subparagraph c

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- Definition

Revenues, net of returns and allowances, realized from sales and other transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 57
-Paragraph 2
-Subparagraph c

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Balance Type:	credit
Period Type:	duration

- Definition

Certain Relationships And Related Party Transactions.

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- Definition

Amounts paid to related parties by ViaSat related to satellite construction contract and in the ordinary course of business.

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Namespace Prefix:	vsat
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Amount of cash received from related parties during the financial reporting period related to transactions in ordinary course of business as well as transactions related to satellite construction contract.

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Namespace Prefix:	vsat
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Balance Type:	debit
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- Definition

Related party transaction collections in excess of revenues and deferred Revenues.

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Namespace Prefix:	vsat
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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Amount of transactions with related party during the financial reporting period defined in percent.

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Certain Relationships and Related-Party Transactions (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			1 Months Ended	3 Months Ended						1 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Apr. 01, 2011	Jan. 31, 2008 Space Systems Loral [Member] Satellite Construction Contract [Member]	Jul. 01, 2011 Space Systems Loral [Member] Satellite Construction Contract [Member]	Jul. 02, 2010 Space Systems Loral [Member] Satellite Construction Contract [Member]	Jul. 01, 2011 Space Systems Loral [Member] Beam Sharing Agreement [Member]	Jul. 02, 2010 Space Systems Loral [Member] Beam Sharing Agreement [Member]	Jul. 01, 2011 Telesat Canada [Member]	Jul. 02, 2010 Telesat Canada [Member]	Jan. 31, 2008 Beam Sharing Agreement [Member]
Certain Relationships and Related-Party Transactions (Textuals) [Abstract]
Satellite construction contract price to purchase satellite				$ 209.1							$ 57.6
Beam Sharing agreement amount as a percent											15.00%
Cash Paid to Related Party					1.3	10.6			2.4	2.8
Related party transaction cash received							0.1	3.8	1.0	0.8
Revenue related to SS/L	1.5	0.1
Related party collections in excess of revenues and deferred revenues	$ 0.3		$ 1.4