Consolidated Statements of Cash Flows (unaudited) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash Flows From Operating Activities
Net Income	$ 843	$ 776
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities
Depreciation, Depletion and Amortization	1,148	1,020
Asset Impairments	63	73
Dry Hole Cost	22	141
Deferred Income Taxes	168	57
Dividends (Income) from Equity Method Investees, Net	(12)	4
Unrealized (Gain) Loss on Commodity Derivative Instruments	67	(74)
Gain on Divestitures	(67)	(83)
Stock Based Compensation	59	51
Other Adjustments for Noncash Items Included in Income	63	64
Changes in Operating Assets and Liabilities
(Increase) Decrease in Accounts Receivable	(260)	68
Decrease (Increase) in Other Current Assets	13	(51)
Increase in Accounts Payable	63	122
(Decrease) Increase in Current Income Taxes Payable	(48)	51
(Decrease) in Other Current Liabilities	(20)	(13)
Other Operating Assets and Liabilities, Net	51	(35)
Net Cash Provided by Operating Activities	2,153	2,171
Cash Flows From Investing Activities
Additions to Property, Plant and Equipment	(3,021)	(2,685)
Additions to Equity Method Investments	(30)	(35)
Proceeds from Divestitures	119	1,161
Other	(5)	0
Net Cash Used in Investing Activities	(2,937)	(1,559)
Cash Flows From Financing Activities
Exercise of Stock Options	39	28
Excess Tax Benefits from Stock-Based Awards	15	14
Dividends Paid, Common Stock	(146)	(119)
Purchase of Treasury Stock	(14)	(13)
Proceeds from Credit Facilities	800	150
Repayment of Credit Facilities	0	(150)
Repayment of CONSOL Installment Loan	(328)	(328)
Repayment of Capital Lease Obligation	(31)	(32)
Net Cash Provided by (Used in) Financing Activities	335	(450)
(Decrease) Increase in Cash and Cash Equivalents	(449)	162
Cash and Cash Equivalents at Beginning of Period	1,387	1,455
Cash and Cash Equivalents at End of Period	$ 938	$ 1,617