Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income	$ 3,501	$ 2,135	$ 2,645
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation, depletion, and amortization	2,126	1,900	1,628
Activity related to the Macondo well incident	(569)	1,000	300
Deferred income tax (benefit) provision, continuing operations	(454)	(132)	165
Share-based Compensation	298	264	217
Other changes:
Receivables	(1,375)	(449)	(682)
Accounts payable	489	327	200
Loss Contingency Accrual, Carrying Value, Payments	0	(219)	0
Increase (Decrease) in Inventories	247	107	611
Other	293	(272)	(208)
Total cash flows from operating activities	4,062	4,447	3,654
Cash flows from investing activities:
Capital expenditures	(3,283)	(2,934)	(3,566)
Proceeds from Sale of Available-for-sale Securities	444	356
Proceeds from Sale and Maturity of Marketable Securities			258
Purchases of investment securities	(183)	(329)	(506)
Sales of property, plant, and equipment	338	241	395
Payments to acquire businesses, net of cash acquired	(231)	(94)	(214)
Other investing activities	(223)	(110)	(55)
Total cash flows from investing activities	(3,138)	(2,870)	(3,688)
Cash flows from financing activities:
Proceeds from exercises of stock options	(800)	(4,356)	0
Proceeds from Issuance of Long-term Debt	0	2,968	0
Payments of Ordinary Dividends, Common Stock	533	465	333
Proceeds from Stock Options Exercised	332	277	107
Other financing activities	(29)	(178)	54
Total cash flows from financing activities	(1,030)	(1,754)	(172)
Effect of exchange rate changes on cash	41	49	(8)
Decrease in cash and equivalents	(65)	(128)	(214)
Cash and equivalents at beginning of year	2,356	2,484	2,698
Cash and equivalents at end of year	2,291	2,356	2,484
Cash payments during the year for:
Interest	384	293	294
Income taxes	$ 1,269	$ 913	$ 1,098