Earnings (Loss) Per Share (Computations Of Basic And Diluted Earnings (Loss) Per Share) (Details) (USD $) In Millions, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Earnings (Loss) Per Share
Net earnings (loss) - numerator for basic earnings (loss) per share	$ (162)	$ 143	$ (884)	$ (373)
Interest on senior convertible notes		7
Net earnings (loss) adjusted for interest on senior convertible notes	$ (162)	$ 150	$ (884)	$ (373)
Denominator for basic loss per share - weighted-average shares	335	333	334	333
Effect of dilutive securities, Senior convertible notes		47
Effect of dilutive securities, Employee options and shares		26
Effect of dilutive securities, Assumed treasury shares purchased		(17)
Effect of dilutive securities, Dilutive potential common shares	335	56	334	333
Denominator for basic and diluted loss per share - weighted-average shares	335	389	334	333
Basic earnings (loss) per share	$ (0.48)	$ 0.43	$ (2.64)	$ (1.12)
Diluted earnings (loss) per share	$ (0.48)	$ 0.39	$ (2.64)	$ (1.12)
Senior convertible notes, employee stock options and deferred stock because inclusion would be anti-dilutive	48		53	57
Employee stock options because the options exercise prices were greater than the average market price of shares	28	14	18	12