Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified			1 Months Ended
	Jan. 03, 2014	Mar. 29, 2013	May 31, 2013 Construction in Progress Satellite ViaSat-2 [Member] Capital Addition Purchase Commitments [Member]
Loss Contingencies [Line Items]
Purchase price under agreement			$ 358.0
Total U.S. government contract-related reserves balance	$ 7.3	$ 7.2