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)	$ (241)	$ (286)	$ (1,900)	$ (722)
Defined benefit pension plans and retiree medical:
Amortization of actuarial loss and prior service cost	57	33	113	65
Current year change	0	0	0	13
Derivative financial instruments:
Change in fair value	(104)	(181)	(56)	294
Reclassification into earnings	1	(132)	(25)	(230)
Unrealized gain (loss) on investments
Net change in value	0	0	2	0
Other Comprehensive Income (Loss) Before Tax	(46)	(280)	34	142
Income tax expense on other comprehensive income	0	0	0	0
Comprehensive Income (Loss)	$ (287)	$ (566)	$ (1,866)	$ (580)