Accounts Receivable (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Accounts Receivable [Line Items]
Unbillable, expected to be collected after one year	$ 1,408	$ 1,020
Accounts receivable, net	7,729	6,546
Commercial Customers [Member]
Accounts Receivable [Line Items]
Unbillable, expected to be collected after one year	172	179
LightSquared [Member]
Accounts Receivable [Line Items]
Accounts receivable, net	$ 112
Number of satellites	2