Condensed Consolidated Statement of Cash Flows (Unaudited) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income	$ 1,937	$ 1,235
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation, depletion, and amortization	991	817
Payments related to KBR TSKJ matters	(6)	(142)
(Income) loss from discontinued operations, net	166	(60)
Other changes:
Receivables	(988)	(716)
Accounts payable	598	286
Inventories	(468)	(280)
Other	136	222
Total cash flows from operating activities	2,366	1,362
Cash flows from investing activities:
Capital expenditures	(2,164)	(1,412)
Sales of marketable securities	751	1,600
Purchases of marketable securities	(501)	(1,182)
Acquisitions of business assets, net of cash acquired	(70)	(383)
Other investing activities	106	122
Total cash flows from investing activities	(1,878)	(1,255)
Cash flows from financing activities:
Dividends to shareholders	(247)	(245)
Proceeds from exercises of stock options	157	78
Other financing activities	2	(129)
Total cash flows from financing activities	(88)	(296)
Effect of exchange rate changes on cash	(23)	(18)
Increase (decrease) in cash and equivalents	377	(207)
Cash and equivalents at beginning of period	1,398	2,082
Cash and equivalents at end of period	1,775	1,875
Cash payments during the period for:
Interest	260	289
Income taxes	$ 871	$ 529