00100 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 00200 - Statement - Consolidated Statements Of Operations link:presentationLink link:calculationLink link:definitionLink 00400 - Statement - Consolidated Statements Of Cash Flows link:presentationLink link:calculationLink link:definitionLink 00500 - Statement - Consolidated Statements Of Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 40302 - Disclosure - Exploratory Costs (Capitalized Exploratory Costs And The Number Of Projects For Which Exploratory Costs Have Been Capitalized) (Details) link:presentationLink link:calculationLink link:definitionLink 40502 - Disclosure - Income Taxes (Income Tax (Provisions) Benefits) (Details) link:presentationLink link:calculationLink link:definitionLink 40503 - Disclosure - Income Taxes (Discontinued Operations) (Details) link:presentationLink link:calculationLink link:definitionLink 41102 - Disclosure - Net Income (Loss) Per Share (Reconciliation Of Weighted-Average Common Shares Outstanding, Basic And Diluted) (Details) link:presentationLink link:calculationLink link:definitionLink 41501 - Disclosure - Interest And Other Income (Interest And Other Income) (Details) link:presentationLink link:calculationLink link:definitionLink 41601 - Disclosure - Other Expense (Schedule Of Components Of Other Expense) (Details) link:presentationLink link:calculationLink link:definitionLink 41701 - Disclosure - Discontinued Operations (Schedule Of Discontinued Operations) (Details) link:presentationLink link:calculationLink link:definitionLink 00090 - Document - Document And Entity Information link:presentationLink link:calculationLink link:definitionLink 00105 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 00300 - Statement - Consolidated Statement Of Stockholders' Equity link:presentationLink link:calculationLink link:definitionLink 00305 - Statement - Consolidated Statement Of Stockholders' Equity (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 10101 - Disclosure - Organization And Nature Of Operations link:presentationLink link:calculationLink link:definitionLink 10201 - Disclosure - Basis Of Presentation link:presentationLink link:calculationLink link:definitionLink 10301 - Disclosure - Exploratory Costs link:presentationLink link:calculationLink link:definitionLink 10401 - Disclosure - Disclosures About Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 10501 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 10601 - Disclosure - Long-Term Debt link:presentationLink link:calculationLink link:definitionLink 10701 - Disclosure - Derivative Financial Instruments link:presentationLink link:calculationLink link:definitionLink 10801 - Disclosure - Asset Retirement Obligations link:presentationLink link:calculationLink link:definitionLink 10901 - Disclosure - Postretirement Benefit Obligations link:presentationLink link:calculationLink link:definitionLink 11001 - Disclosure - Commitments And Contingencies link:presentationLink link:calculationLink link:definitionLink 11101 - Disclosure - Net Income (Loss) Per Share link:presentationLink link:calculationLink link:definitionLink 11201 - Disclosure - Geographic Operating Segment Information link:presentationLink link:calculationLink link:definitionLink 11301 - Disclosure - Deferred Revenue link:presentationLink link:calculationLink link:definitionLink 11401 - Disclosure - Gain (Loss) On Disposition Of Assets, Net link:presentationLink link:calculationLink link:definitionLink 11501 - Disclosure - Interest And Other Income link:presentationLink link:calculationLink link:definitionLink 11601 - Disclosure - Other Expense link:presentationLink link:calculationLink link:definitionLink 11701 - Disclosure - Discontinued Operations link:presentationLink link:calculationLink link:definitionLink 11801 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 20202 - Disclosure - Basis Of Presentation (Policy) link:presentationLink link:calculationLink link:definitionLink 30203 - Disclosure - Basis Of Presentation (Tables) link:presentationLink link:calculationLink link:definitionLink 30303 - Disclosure - Exploratory Costs (Tables) link:presentationLink link:calculationLink link:definitionLink 30403 - Disclosure - Disclosures About Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 30503 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 30703 - Disclosure - Derivative Financial Instruments (Tables) link:presentationLink link:calculationLink link:definitionLink 30803 - Disclosure - Asset Retirement Obligations (Tables) link:presentationLink link:calculationLink link:definitionLink 31103 - Disclosure - Net Income (Loss) Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 31203 - Disclosure - Geographic Operating Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 31303 - Disclosure - Deferred Revenue (Tables) link:presentationLink link:calculationLink link:definitionLink 31503 - Disclosure - Interest And Other Income (Tables) link:presentationLink link:calculationLink link:definitionLink 31603 - Disclosure - Other Expense (Tables) link:presentationLink link:calculationLink link:definitionLink 31703 - Disclosure - Discontinued Operations (Tables) link:presentationLink link:calculationLink link:definitionLink 40201 - Disclosure - Basis Of Presentation (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40202 - Disclosure - Basis Of Presentation (Allowances For Doubtful Accounts) (Details) link:presentationLink link:calculationLink link:definitionLink 40203 - Disclosure - Basis Of Presentation (Stock-Based Awards, Lapses, Exercises And Forfeitures) (Details) link:presentationLink link:calculationLink link:definitionLink 40301 - Disclosure - Exploratory Costs (Capitalized Exploratory Well And Project Activity) (Details) link:presentationLink link:calculationLink link:definitionLink 40401 - Disclosure - Disclosures About Fair Value Measurements (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40402 - Disclosure - Disclosures About Fair Value Measurements (Assets And Liabilities That Are Measured At Fair Value On A Recurring Basis) (Details) link:presentationLink link:calculationLink link:definitionLink 40403 - Disclosure - Disclosures About Fair Value Measurements (Fair Value Measurements Using Significant Unobservable Inputs) (Details) link:presentationLink link:calculationLink link:definitionLink 40404 - Disclosure - Disclosures About Fair Value Measurements (Fair Values Of The Company's Financial Instruments) (Details) link:presentationLink link:calculationLink link:definitionLink 40501 - Disclosure - Income Taxes (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40601 - Disclosure - Long-Term Debt (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40701 - Disclosure - Derivative Financial Instruments (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40702 - Disclosure - Derivative Financial Instruments (Oil Derivative Contracts Volume And Weighted Average Price) (Details) link:presentationLink link:calculationLink link:definitionLink 40703 - Disclosure - Derivative Financial Instruments (Natural Gas Liquids Volume And Weighted Average Price) (Details) link:presentationLink link:calculationLink link:definitionLink 40704 - Disclosure - Derivative Financial Instruments (Gas Volume And Weighted Average Price) (Details) link:presentationLink link:calculationLink link:definitionLink 40705 - Disclosure - Derivative Financial Instruments (Derivative Instruments) (Details) link:presentationLink link:calculationLink link:definitionLink 40706 - Disclosure - Derivative Financial Instruments (Derivative Obligations Under Terminated Hedge Arrangements) (Details) link:presentationLink link:calculationLink link:definitionLink 40801 - Disclosure - Asset Retirement Obligations (Asset Retirement Obligations) (Details) link:presentationLink link:calculationLink link:definitionLink 40901 - Disclosure - Postretirement Benefit Obligations (Accumulated Postretirement Benefit Obligations) (Details) link:presentationLink link:calculationLink link:definitionLink 41101 - Disclosure - Net Income (Loss) Per Share (Reconciliation Of Earnings, Basic And Diluted) (Details) link:presentationLink link:calculationLink link:definitionLink 41201 - Disclosure - Geographic Operating Segment Information (Schedule Of Income Statement By Geographic Operating Segment) (Details) link:presentationLink link:calculationLink link:definitionLink 41202 - Disclosure - Geographic Operating Segment Information (Reconciliation Of Assets From Segment To Consolidated) (Details) link:presentationLink link:calculationLink link:definitionLink 41301 - Disclosure - Deferred Revenue (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 41302 - Disclosure - Deferred Revenue (Deferred Revenue Carrying Values) (Details) link:presentationLink link:calculationLink link:definitionLink 41303 - Disclosure - Deferred Revenue (Revenue Recognition In Future Periods) (Details) link:presentationLink link:calculationLink link:definitionLink 41401 - Disclosure - Gain (Loss) On Disposition Of Assets, Net (Details) link:presentationLink link:calculationLink link:definitionLink