Commitments and Contingencies (Narrative) (Details) (USD $)	3 Months Ended	6 Months Ended
	Mar. 31, 2010 market	Jun. 30, 2011 years gHZ mHZ market site
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
Letters of Credit Outstanding, Amount		1,200,000,000
Total Payments directly attributable to performance under Report and Order		3,000,000,000
Payments directly attributable to performance under report and order, net change related to FCC licenses		132,000,000
Licensees reimbursed share of costs		200,000,000
Number of Markets where licensees have not moved off of replacement channels	21	9
Letter Of Credit Required By The FCCs Report And Order [Member]
Original Letter of Credit Required by FCC Report and Order		2,500,000,000
Letters of Credit Outstanding, Amount		$ 1,100,000,000