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

	Three Months Ended March 31,						For the Years Ended December 31,
	2010			2009			2009			2008			2007			2006			2005
							(in millions)
Earnings:
Income (loss) from continuing operations before income taxes	($	794	)	($	1,124	)	($	3,494	)	($	4,060	)	($	29,775	)	$	1,483		$	1,291
Equity in losses (income) of unconsolidated investments		254			281			803			64			3			6			(107	)
Fixed charges		527			518			2,047			2,094			2,213			2,242			1,742
Interest capitalized		(3	)		(7	)		(12	)		(123	)		(127	)		(113	)		(53	)
Amortization of interest capitalized		21			21			85			80			72			107			98
Earnings (loss), as adjusted		5			(311	)		(571	)		(1,945	)		(27,614	)		3,725			2,971
Fixed charges:
Interest expense, gross		372			361			1,450			1,362			1,433			1,533			1,294
Interest capitalized		3			7			12			123			127			113			53
Portion of rentals representative of interest		152			150			585			609			653			596			395
Fixed charges		527			518			2,047			2,094			2,213			2,242			1,742
Preferred stock dividends paid		0			0			0			0			0			3			11
Total fixed charges		527			518			2,047			2,094			2,213			2,242			1,742
Total fixed charges and preferred stock dividends		527			518			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 $0.5 billion at March 31, 2010.

(2) Earnings (loss), as adjusted were inadequate to cover fixed charges by $0.8 billion at March 31, 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.