Investments (Tables)

3 Months Ended

Mar. 31, 2012

Investments [Abstract]

Schedule of investments in marketable equity securities and other

The components of investments were as follows:

	March 31, 2012		December 31, 2011
	(in millions)
Marketable equity securities	$	54	$	43
Equity method and other investments	1,726		1,953
	$	1,780	$	1,996

Investee summarized income statement information

	Three Months Ended
	March 31,
	2012			2011
	(in millions)
Revenues	$	323		$	237
Operating expenses	(745		)	(884		)
Operating loss	$	(422	)	$	(647	)
Net loss from continuing operations before non-controlling interests	$	(561	)	$	(793	)
Net income (loss) from discontinued operations before non-controlling interests	$	1		$	(41	)