Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:
Net income	$ 2,844	$ 1,842	$ 1,155
Depreciation, depletion, and amortization	1,359	1,119	931
Payments related to KBR TSKJ matters	(6)	(177)	(417)
(Benefit) provision for deferred income taxes, continuing operations	(30)	124	274
(Income) loss from discontinued operations, net	166	(40)	9
Other changes:
Receivables	(1,218)	(902)	869
Inventories	(564)	(331)	232
Accounts payable	649	330	(118)
Other	484	247	(529)
Total cash flows from operating activities	3,684	2,212	2,406
Cash flows from investing activities:
Capital expenditures	(2,953)	(2,069)	(1,864)
Sales of marketable securities	1,001	1,925	300
Purchases of marketable securities	(501)	(1,282)	(1,620)
Acquisitions of business assets, net of cash acquired	(880)	(523)	(55)
Other investing activities	143	194	154
Total cash flows from investing activities	(3,190)	(1,755)	(3,085)
Cash flows from financing activities:
Proceeds from long-term borrowings, net of offering costs	978	0	1,975
Payments on long-term borrowings	0	(790)	(31)
Dividends to shareholders	(330)	(327)	(324)
Proceeds from exercises of stock options	160	102	74
Payments to reacquire common stock	(43)	(141)	(17)
Other financing activities	68	42	(7)
Total cash flows from financing activities	833	(1,114)	1,670
Effect of exchange rate changes on cash	(27)	(27)	(33)
Increase (decrease) in cash and equivalents	1,300	(684)	958
Cash and equivalents at beginning of year	1,398	2,082	1,124
Cash and equivalents at end of year	2,698	1,398	2,082
Cash payments during the year for:
Interest	261	310	251
Income taxes	$ 1,285	$ 804	$ 485