Commitments and Contingencies (Narrative) (Details) (USD $)	6 Months Ended
	Jun. 30, 2013 gHZ mHZ
Commitments and Contingencies [Line Items]
MHz licenses utilized in iDEN network	800
Megahertz of 1.9 Gigahertz spectrum received in report and order	10
Gigahertz	1.9
Minimum spectrum reconfiguration obligations	$ 2,800,000,000
Letter of Credit, Minimum	850,000,000
Total Payments directly attributable to performance under Report and Order	3,200,000,000
Payments directly attributable to performance under report and order, net change related to FCC licenses	$ 88,000,000
Starburst II, Inc. [Member]
Commitments and Contingencies [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	54,579,924
Class of Warrant or Right, Exercise Price of Warrants or Rights	5.25