Strategic Partnering Arrangements - Additional Information (Detail) € in Millions	1 Months Ended
	Feb. 29, 2016 EUR (€)
Eutelsat Newly Formed Subsidiary [Member]
Business Acquisition [Line Items]
Minority interest ownership percentage of issued shares of an entity	49.00%
Payments to acquire the issued shares of an entity	€ 132.5
Eutelsat Newly Formed Subsidiary [Member] | Eutelsat [Member]
Business Acquisition [Line Items]
Ownership percentage of issued and outstanding shares of an entity	51.00%
ViaSat Newly Formed Subsidiary [Member]
Business Acquisition [Line Items]
Ownership percentage of issued and outstanding shares of an entity	51.00%
ViaSat Newly Formed Subsidiary [Member] | Eutelsat [Member]
Business Acquisition [Line Items]
Minority interest ownership percentage of issued shares of an entity	49.00%