Consolidated Statements Of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Consolidated Statements Of Comprehensive Income [Abstract]
Net Earnings (Loss)	$ (1,660)	$ (436)
Defined benefit pension plans and retiree medical:
Amortization of actuarial loss and prior service cost	56	32
Current year change	2	13
Derivative financial instruments:
Change in fair value	48	475
Reclassification into earnings	(26)	(98)
Unrealized gain (loss) on investments
Net change in value
Other Comprehensive Income (Loss) Before Tax	80	422
Income tax expense on other comprehensive income
Comprehensive Income (Loss)	$ (1,580)	$ (14)