Composition of Certain Balance Sheet Captions (Parenthetical) (Detail)	9 Months Ended
	Dec. 28, 2012
Technology [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Other acquired intangible assets, weighted average useful life	6 years
Contracts And Customer Relationships [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Other acquired intangible assets, weighted average useful life	7 years
Satellite co-location rights [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Other acquired intangible assets, weighted average useful life	9 years
Trade Names [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Other acquired intangible assets, weighted average useful life	3 years
Other [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Other acquired intangible assets, weighted average useful life	6 years
Minimum [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Property, equipment and satellites, estimated useful life (years)	2 years
Other acquired intangible assets, weighted average useful life	3 years
Maximum [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Property, equipment and satellites, estimated useful life (years)	24 years
Other acquired intangible assets, weighted average useful life	10 years
Satellite WildBlue-1 [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Property, equipment and satellites, estimated useful life (years)	10 years
Capital lease of satellite capacity Anik F2 [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Property, equipment and satellites, estimated useful life (years)	10 years
Satellite - ViaSat-1 [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Property, equipment and satellites, estimated useful life (years)	17 years
Machinery and Equipment [Member] | Minimum [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Property, equipment and satellites, estimated useful life (years)	2 years
Machinery and Equipment [Member] | Maximum [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Property, equipment and satellites, estimated useful life (years)	5 years
Computer Equipment And Software [Member] | Minimum [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Property, equipment and satellites, estimated useful life (years)	2 years
Computer Equipment And Software [Member] | Maximum [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Property, equipment and satellites, estimated useful life (years)	7 years
Customer Premise Equipment [Member] | Minimum [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Property, equipment and satellites, estimated useful life (years)	3 years
Customer Premise Equipment [Member] | Maximum [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Property, equipment and satellites, estimated useful life (years)	5 years
Furniture and Fixtures [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Property, equipment and satellites, estimated useful life (years)	7 years
Leaseholds and Leasehold Improvements [Member] | Minimum [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Property, equipment and satellites, estimated useful life (years)	2 years
Leaseholds and Leasehold Improvements [Member] | Maximum [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Property, equipment and satellites, estimated useful life (years)	17 years
Building [Member]
Schedule Of Composition Of Certain Balance Sheet Captions [Line Items]
Property, equipment and satellites, estimated useful life (years)	24 years