Earnings (Loss) Per Share (Computations Of Basic And Diluted Earnings (Loss) Per Share) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share [Abstract]
Net earnings (loss)—numerator for basic earnings (loss) per share	$ 220	$ (241)	$ (122)	$ (1,900)
Interest on senior convertible notes	7	0	0	0
Net earnings (loss) adjusted for interest on senior convertible notes	$ 227	$ (241)	$ (122)	$ (1,900)
Denominator for basic earnings (loss) per share - weighted-average shares (shares)	335	335	335	335
Effect of dilutive securities, Senior convertible notes (shares)	47	0	0	0
Effect of dilutive securities, Employee options and shares (shares)	9	0	0	0
Effect of dilutive securities, Assumed treasury shares purchased (shares)	(3)	0	0	0
Dilutive potential common shares (shares)	388	335	335	335
Denominator for diluted earnings (loss) per share - adjusted weighted-average shares (shares)	388	335	335	335
Basic earnings (loss) per share (usd per share)	$ 0.65	$ (0.72)	$ (0.36)	$ (5.67)
Diluted earnings (loss) per share (usd per share)	$ 0.59	$ (0.72)	$ (0.36)	$ (5.67)
Convertible notes, employee stock options and deferred stock because inclusion would be anti-dilutive (shares)	0	46	52	46
Employee stock options because the options’ exercise prices were greater than the average market price of shares (shares)	8	24	15	24