Investments (Tables)

12 Months Ended

Dec. 31, 2011

Investments [Abstract]

Schedule of investments in marketable equity securities and other

	December 31,
	2011		2010
	(in millions)
Marketable equity securities	$	43	$	39
Equity method and other investments	1,953		3,350
	$	1,996	$	3,389

Related party summarized balance sheet information [Text Block]

Summarized financial information for Clearwire is as follows:

	December 31,
	2011		2010
	(in millions)
Current assets	$	1,287	$	1,858
Noncurrent assets	7,556		9,182
Current liabilities	$	280	$	675
Noncurrent liabilities	4,917		4,495

Investee Summarized Income Statement information [Text Block]

	Year Ended December 31,
	2011			2010			2009
	(in millions)
Revenues	$	1,254		$	535		$	244
Operating expenses	(3,645		)	(2,698		)	(1,384		)
Operating loss	$	(2,391	)	$	(2,163	)	$	(1,140	)
Net loss from continuing operations before non-controlling interests	$	(2,856	)	$	(2,251	)	$	(1,209	)
Net loss from discontinued operations before non-controlling interests	$	(82	)	$	(52	)	$	(45	)