Consolidated Statements Of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Statement of Income and Comprehensive Income [Abstract]
Net Earnings (Loss)	$ (264)	$ (284)	$ (1,940)	$ (715)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Recognized in Net Periodic Benefit Cost, before Tax	57	33	113	65
Defined benefit pension plans and retiree medical:
Current year change	0	0	0	13
Derivative financial instruments:
Change in fair value	(104)	(181)	(56)	294
Reclassification into earnings	1	(133)	(25)	(230)
Unrealized gain (loss) on investments
Net change in value	0	0	2	0
Other Comprehensive Income (Loss) Before Tax	(46)	(281)	34	142
Income tax expense on other comprehensive income	0	0	0	0
Comprehensive Income (Loss)	$ (310)	$ (565)	$ (1,906)	$ (573)