Consolidated Statements of Cash Flows (unaudited) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash Flows From Operating Activities
Net Income	$ 811	$ 843
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities
Depreciation, Depletion and Amortization	1,297	1,148
Asset Impairments	164	63
Dry Hole Cost	163	22
Deferred Income Taxes	61	168
Income from Equity Method Investees, Net of Dividends	53	(12)
(Gain) Loss on Commodity Derivative Instruments	(74)	69
Net Cash Received (Paid) in Settlement of Commodity Derivative Instruments	(95)	(2)
Gain on Divestitures	(72)	(67)
Stock Based Compensation	67	59
Other Adjustments for Noncash Items Included in Income	42	63
Changes in Operating Assets and Liabilities
(Increase) Decrease in Accounts Receivable	166	(260)
Increase in Accounts Payable	103	63
Increase (Decrease) in Current Income Taxes Payable	21	(48)
Increase (Decrease) in Other Current Assets and Liabilities, Net	16	(7)
Other Noncurrent Operating Assets and Liabilities, Net	(20)	51
Net Cash Provided by Operating Activities	2,703	2,153
Cash Flows From Investing Activities
Additions to Property, Plant and Equipment	(3,585)	(3,021)
Additions to Equity Method Investments	(58)	(30)
Distribution from Equity Method Investee	156	0
Proceeds from Divestitures	312	119
Other	0	(5)
Net Cash Used in Investing Activities	(3,175)	(2,937)
Cash Flows From Financing Activities
Exercise of Stock Options	45	39
Excess Tax Benefits from Stock-Based Awards	18	15
Dividends Paid, Common Stock	(182)	(146)
Purchase of Treasury Stock	(15)	(14)
Proceeds from Credit Facilities	900	800
Repayments of Debt	0	(328)
Repayment of Credit Facilities	(200)	0
Repayment of Capital Lease Obligation	(42)	(31)
Net Cash Provided by Financing Activities	524	335
Increase (Decrease) in Cash and Cash Equivalents	52	(449)
Cash and Cash Equivalents at Beginning of Period	1,117	1,387
Cash and Cash Equivalents at End of Period	$ 1,169	$ 938