Consolidated Statements Of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]
Net Earnings (Loss)	$ 289	$ (238)	$ 167	$ (2,139)
Defined benefit pension plans and retiree medical:
Amortization of actuarial (gain) loss and prior service cost	(33)	56	(99)	169
Current year change	0	0	0	0
Benefit plan modifications	0	1,673	0	1,673
Derivative financial instruments:
Change in fair value	22	86	(34)	29
Reclassification into earnings	11	12	23	(13)
Unrealized gain (loss) on investments:
Net change in value	0	2	0	5
Other Comprehensive Income (Loss) Before Tax	0	1,829	(110)	1,863
Income tax expense on other comprehensive income	0	0	0	0
Comprehensive Income (Loss)	$ 289	$ 1,591	$ 57	$ (276)