Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2013

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Fair Value, by Balance Sheet Grouping [Table Text Block]

The following table presents carrying amounts and estimated fair values of our exchangeable notes and embedded derivative as well as current and long-term debt:

	Carrying amount at June 30, 2013		Estimated Fair Value Using Input Type
			Quoted prices in active markets		Observable		Unobservable		Total estimated fair value
	(in millions)
Clearwire Exchangeable Notes	$	240	$	—	$	—	$	240	$	240
Current and long-term debt	$	23,445	$	16,488	$	4,775	$	4,046	$	25,309

	Carrying amount at December 31, 2012		Estimated Fair Value Using Input Type
			Quoted prices in active markets		Observable		Unobservable		Total estimated fair value
	(in millions)
Current and long-term debt	$	23,569	$	17,506	$	6,118	$	3,104	$	26,728