Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash received from customers
Collections on billings	$ 20,892	$ 21,628	$ 23,531
Progress payments	4,472	4,803	4,437
Other cash receipts	99	149	40
Total sources of cash—continuing operations	25,463	26,580	28,008
Uses of cash—continuing operations
Cash paid to suppliers and employees	(21,074)	(22,059)	(23,759)
Pension contributions	(367)	(1,084)	(789)
Interest paid, net of interest received	(200)	(227)	(269)
Income taxes paid, net of refunds received	(1,119)	(810)	(1,071)
Excess tax benefits from stock-based compensation	(45)	(17)	(22)
Other cash payments	(18)	(36)	(42)
Total uses of cash—continuing operations	(22,823)	(24,233)	(25,952)
Cash provided by continuing operations	2,640	2,347	2,056
Cash (used in) provided by discontinued operations	0	(232)	397
Net cash provided by operating activities	2,640	2,115	2,453
Continuing operations
Capital expenditures	(331)	(492)	(585)
Maturities of short-term investments	250	200	0
Contribution received from the spin-off of shipbuilding business	0	1,429	0
Purchases of short-term investments	0	(450)	(2)
Other investing activities, net	(3)	56	16
Cash (used in) provided by investing activities from continuing operations	(84)	743	(571)
Cash used in investing activities from discontinued operations	0	(63)	(189)
Net cash (used in) provided by investing activities	(84)	680	(760)
Financing activities
Common stock repurchases	(1,316)	(2,295)	(1,177)
Cash dividends paid	(535)	(543)	(545)
Proceeds from exercises of stock options	188	101	142
Excess tax benefits from stock-based compensation	45	17	22
Payments of long-term debt	0	(768)	(1,011)
Proceeds from issuance of long-term debt	0	0	1,484
Other financing activities, net	(78)	(6)	(2)
Cash used in financing activities from continuing operations	(1,696)	(3,494)	(1,087)
Cash used in financing activities from discontinued operations	0	0	(179)
Net cash used in financing activities	(1,696)	(3,494)	(1,266)
Increase (decrease) in cash and cash equivalents	860	(699)	427
Cash and cash equivalents, beginning of year	3,002	3,701	3,274
Cash and cash equivalents, end of year	$ 3,862	$ 3,002	$ 3,701