Other Financial Information Other Financial Information - Current Assets and Current Liabilities (Details 3) (USD $) In Millions, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jul. 28, 2014 Wireless spectrum licenses Subsequent event	Jun. 30, 2014 Wireless spectrum licenses Fair value inputs, Level 3
Other Current Assets
Prepaid expenses	$ 284	$ 266
Materials, Supplies, and Other	132	167
Assets held-for-sale, current	54	26		39
Deferred activation and installation charges	102	94
Other	56	44
Total other current assets	628	597
Selected Current Liabilities
Accounts payable	1,153	1,111
Other Current Liabilities
Accrued rent	38	52
Legal reserves	24	273
Other	146	189
Total other current liabilities	208	514
Current Liabilities
Book overdraft balance	84	88
Capital Expenditures Incurred but Not yet Paid	107	140
Sales Price per Sales Agreement
Sale price specified in definitive sales agreement			$ 39