Consolidated Statements of Cash Flows (unaudited) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash Flows From Operating Activities
Net Income	$ 392	$ 639
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities
Depreciation, Depletion and Amortization	837	736
Asset Impairments	131	0
Dry Hole Cost	2	23
Deferred Income Taxes	24	108
Income from Equity Method Investees, Net of Dividends	(3)	(18)
(Gain) Loss on Commodity Derivative Instruments	311	(89)
Net Cash Received (Paid) in Settlement of Commodity Derivative Instruments	(83)	9
Gain on Divestitures	(42)	(67)
Stock Based Compensation	45	38
Other Adjustments for Noncash Items Included in Income	38	33
Changes in Operating Assets and Liabilities
(Increase) Decrease in Accounts Receivable	55	(193)
Increase in Accounts Payable	126	131
Decrease in Current Income Taxes Payable	(86)	(81)
Increase (Decrease) in Other Current Liabilities	25	(33)
Other Operating Assets and Liabilities, Net	(15)	8
Net Cash Provided by Operating Activities	1,757	1,244
Cash Flows From Investing Activities
Additions to Property, Plant and Equipment	(2,321)	(1,929)
Additions to Equity Method Investments	(40)	(23)
Proceeds from Divestitures	146	114
Other	0	3
Net Cash Used in Investing Activities	(2,215)	(1,835)
Cash Flows From Financing Activities
Exercise of Stock Options	41	31
Excess Tax Benefits from Stock-Based Awards	17	12
Dividends Paid, Common Stock	(116)	(96)
Purchase of Treasury Stock	(15)	(14)
Proceeds from Credit Facilities	600	0
Repayment of Credit Facilities	(200)	0
Repayment of Capital Lease Obligation	(28)	(23)
Net Cash Provided by (Used in) Financing Activities	299	(90)
Decrease in Cash and Cash Equivalents	(159)	(681)
Cash and Cash Equivalents at Beginning of Period	1,117	1,387
Cash and Cash Equivalents at End of Period	$ 958	$ 706