General Information (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended	1 Months Ended
Sep. 30, 2013 item	Jan. 31, 2013 Geo Eye Inc
General Information
Number of in-orbit imagery satellites that the entity owns and operates	5
General Information
Outstanding common stock percentage acquired (as a percent)		100.00%
Value of acquisition		$ 1,380.7

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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