Investments (Tables)

12 Months Ended

Dec. 31, 2012

Investments [Abstract]

Schedule of investments in marketable equity securities and other

	December 31,
	2012		2011
	(in millions)
Marketable equity securities	$	45	$	43
Equity method and other investments	1,008		1,953
	$	1,053	$	1,996

Related party summarized balance sheet information [Text Block]

Summarized financial information for Clearwire is as follows:

	December 31,
	2012		2011
	(in millions)
Current assets	$	988	$	1,287
Noncurrent assets	6,678		7,556
Current liabilities	$	405	$	280
Noncurrent liabilities	5,379		4,917

Investee Summarized Income Statement information [Text Block]

	Year Ended December 31,
	2012			2011			2010
	(in millions)
Revenues	$	1,265		$	1,254		$	535
Operating expenses	(2,644		)	(3,645		)	(2,698		)
Operating loss	$	(1,379	)	$	(2,391	)	$	(2,163	)
Net loss from continuing operations before non-controlling interests	$	(1,744	)	$	(2,856	)	$	(2,251	)
Net loss from discontinued operations before non-controlling interests	$	(168	)	$	(82	)	$	(52	)