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				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Earnings Per Share [Abstract]
Net earnings (loss)—numerator for basic earnings (loss) per share	$ 289		$ (238)		$ 167		$ (2,139)
Interest on senior convertible notes (1)	7	[1]	0	[1]	22	[1]	0	[1]
Net earnings (loss) adjusted for interest on senior convertible notes	$ 296		$ (238)		$ 189		$ (2,139)
Denominator for basic earnings (loss) per share - weighted-average shares (shares)	336		335		335		335
Effect of dilutive securities, Senior convertible notes (shares)	46		0		46		0
Effect of dilutive securities, Employee options and shares (shares)	8		0		8		0
Effect of dilutive securities, Assumed treasury shares purchased (shares)	(2)		0		(2)		0
Dilutive potential common shares (shares)	388		335		387		335
Denominator for diluted earnings (loss) per share - adjusted weighted-average shares (shares)	388		335		387		335
Basic earnings (loss) per share (usd per share)	$ 0.86		$ (0.71)		$ 0.50		$ (6.38)
Diluted earnings (loss) per share (usd per share)	$ 0.76		$ (0.71)		$ 0.49		$ (6.38)
Convertible notes, employee stock options and deferred stock because inclusion would be anti-dilutive (shares)	0		46		0		46
Employee stock options because the options’ exercise prices were greater than the average market price of shares (shares)	9		23		13		23

[1] The nine months ended September 30, 2013 does not include the impact of postpetition interest recorded in first quarter of 2013. If such amounts were included, results would have been anti-dilutive and conversion would not have been assumed.