Exhibit 12

Computation of Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends

	Six Months Ended June 30,						For the Years Ended December 31,
	2010			2009			2009			2008			2007			2006			2005
	(in millions)
Earnings:
Income (loss) from continuing operations before income taxes	$	(1,507	)	$	(1,733	)	$	(3,494	)	$	(4,060	)	$	(29,775	)	$	1,483		$	1,291
Equity in losses (income) of unconsolidated investments		554			416			803			64			3			6			(107	)
Fixed charges		1,064			1,018			2,047			2,094			2,213			2,242			1,742
Interest capitalized		(7	)		(5	)		(12	)		(123	)		(127	)		(113	)		(53	)
Amortization of interest capitalized		43			41			85			80			72			107			98
Earnings (loss), as adjusted		147			(263	)		(571	)		(1,945	)		(27,614	)		3,725			2,971
Fixed charges:
Interest expense, gross		753			719			1,450			1,362			1,433			1,533			1,294
Interest capitalized		7			5			12			123			127			113			53
Portion of rentals representative of interest		304			294			585			609			653			596			395
Fixed charges		1,064			1,018			2,047			2,094			2,213			2,242			1,742
Preferred stock dividends paid		0			0			0			0			0			3			11
Total fixed charges		1,064			1,018			2,047			2,094			2,213			2,242			1,742
Total fixed charges and preferred stock dividends		1,064			1,018			2,047			2,094			2,213			2,245			1,753
Ratio of combined earnings to fixed charges and preferred stock dividends		—	(1)		—	(2)		—	(3)		—	(4)		—	(5)		1.66			1.69

(1) Earnings (loss), as adjusted were inadequate to cover fixed charges by $0.9 billion at June 30, 2010.

(2) Earnings (loss), as adjusted were inadequate to cover fixed charges by $1.3 billion at June 30, 2009.

(3) Earnings (loss), as adjusted were inadequate to cover fixed charges by $2.6 billion in 2009.

(4) Earnings (loss), as adjusted were inadequate to cover fixed charges by $4.0 billion in 2008.

(5) Earnings (loss), as adjusted were inadequate to cover fixed charges by $29.8 billion in 2007.