CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
CASH FLOW FROM OPERATING ACTIVITIES
Net income	$ 4,260	$ 4,262
Adjustments to reconcile net income to net cash provided by operating activities:
Discontinued operations, net	14	9
Depreciation, depletion and amortization of assets	3,896	3,320
Deferred income tax provision	1,016	1,255
Other noncash charges to income	258	139
Gain on sale of equity investment	(131)
Undistributed earnings from equity investments	(40)	(14)
Dry hole expenses	115	221
Changes in operating assets and liabilities, net	445	(663)
Operating cash flow from continuing operations	9,833	8,529
Operating cash flow from discontinued operations, net of taxes	(47)	(30)
Net cash provided by operating activities	9,786	8,499
CASH FLOW FROM INVESTING ACTIVITIES
Capital expenditures	(6,551)	(7,716)
Payments for purchases of assets and businesses	(342)	(1,164)
Sale of equity investment, net	270
Other, net	3	9
Net cash used by investing activities	(6,620)	(8,871)
CASH FLOW FROM FINANCING ACTIVITIES
Proceeds from long-term debt		1,736
Payments of long-term debt	(66)
Proceeds from issuance of common stock	27	61
Purchases of treasury stock	(64)	(204)
Contributions from noncontrolling interest	145
Cash dividends paid	(1,034)	(1,252)
Other, net	5	10
Net cash (used) provided by financing activities	(987)	351
Increase (decrease) in cash and cash equivalents	2,179	(21)
Cash and cash equivalents-beginning of period	1,592	3,781
Cash and cash equivalents-end of period	$ 3,771	$ 3,760