Consolidated Statements Of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statements Of Comprehensive Income [Abstract]
Net Earnings (Loss)	$ (1,979)	$ (471)	$ (1,468)
Defined benefit pension plans and retiree medical:
Amortization of actuarial loss and prior service cost	130	138	136
Current year change	(1,216)	(385)	(253)
Derivative financial instruments:
Change in fair value	190	72	151
Reclassification into earnings	(313)	144	662
Unrealized gain (loss) on investments
Net change in value			5
Other Comprehensive Income (Loss) Before Tax	(1,209)	(31)	701
Income tax expense on other comprehensive income			(248)
Comprehensive Income (Loss)	$ (3,188)	$ (502)	$ (1,015)