2114100 - Disclosure - Additional Balance Sheet Information
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2107100 - Disclosure - Asset Retirement Obligations
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2109100 - Disclosure - Capital Stock
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2108100 - Disclosure - Commitments and Contingencies
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2104100 - Disclosure - Debt and Credit Agreements
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2105100 - Disclosure - Derivative Instruments and Hedging Activities
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2405403 - Disclosure - Derivative Instruments and Hedging Activities - Effect of Derivative Instruments on the Condensed Consolidated Balance Sheet (Details)
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2405405 - Disclosure - Derivative Instruments and Hedging Activities - Effect of Derivative Instruments on the Condensed Consolidated Statement of Operations (Details)
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2405404 - Disclosure - Derivative Instruments and Hedging Activities - Offsetting of Derivative Assets and Liabilities in the Condensed Consolidated Balance Sheet (Details)
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2405404 - Disclosure - Derivative Instruments and Hedging Activities - Offsetting of Derivative Assets and Liabilities in the Condensed Consolidated Balance Sheet (Details)
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2405402 - Disclosure - Derivative Instruments and Hedging Activities - Outstanding Commodity Derivatives (Details)
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2305301 - Disclosure - Derivative Instruments and Hedging Activities (Tables)
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2111100 - Disclosure - Earnings per Common Share
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2411402 - Disclosure - Earnings per Common Share - Schedule of EPS (Details)
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2311301 - Disclosure - Earnings per Common Share (Tables)
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2103100 - Disclosure - Equity Method Investments
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2403402 - Disclosure - Equity Method Investments - Activity Related to Equity Method Investments (Details)
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2403403 - Disclosure - Equity Method Investments - Summarized Financial Information of Investment
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2106100 - Disclosure - Fair Value Measurements
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2406405 - Disclosure - Fair Value Measurements - Fair Value of Other Financial Instruments (Details)
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2406402 - Disclosure - Fair Value Measurements - Financial Assets and Liabilities, Recurring (Details)
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2406403 - Disclosure - Fair Value Measurements - Reconciliation of Changes in Fair Value of Financial Assets and Liabilities (Details)
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2101100 - Disclosure - Financial Statement Presentation
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2201201 - Disclosure - Financial Statement Presentation (Policies)
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2102100 - Disclosure - Properties and Equipment, Net
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2402402 - Disclosure - Properties and Equipment, Net - Schedule of PPE (Details)
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2110100 - Disclosure - Stock-based Compensation
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2410403 - Disclosure - Stock-based Compensation - Assumptions for TSR Shares (Details)
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