Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash received from customers
Progress payments	$ 1,021	$ 1,035
Collections on billings	4,921	5,427
Other cash receipts	27	7
Total sources of cash - continuing operations	5,969	6,469
Uses of cash - continuing operations
Cash paid to suppliers and employees	(5,858)	(6,168)
Pension contributions	(17)	(34)
Interest paid, net of interest received	(78)	(96)
Income taxes paid, net of refunds received	(92)	(46)
Excess tax benefits from stock-based compensation	(27)	(9)
Other cash payments	(2)	(4)
Total uses of cash - continuing operations	(6,074)	(6,357)
Cash (used in) provided by continuing operations	(105)	112
Cash used in discontinued operations	0	(232)
Net cash used in operating activities	(105)	(120)
Continuing operations
Maturities of short-term investments	250	0
Capital expenditures	(81)	(123)
Contribution received from the spin-off of shipbuilding business	0	1,429
Other investing activities, net	0	38
Cash provided by investing activities from continuing operations	169	1,344
Cash used in investing activities from discontinued operations	0	(63)
Net cash provided by investing activities	169	1,281
Financing activities
Common stock repurchases	(263)	(13)
Cash dividends paid	(127)	(137)
Proceeds from exercises of stock options	40	43
Excess tax benefits from stock-based compensation	27	9
Payments of long-term debt	0	(750)
Other financing activities, net	(61)	5
Net cash used in financing activities	(384)	(843)
(Decrease) increase in cash and cash equivalents	(320)	318
Cash and cash equivalents, beginning of year	3,002	3,701
Cash and cash equivalents, end of period	$ 2,682	$ 4,019