0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 0000002 - Document - Audit Information link:presentationLink link:calculationLink link:definitionLink 0000003 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS link:presentationLink link:calculationLink link:definitionLink 0000004 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS)/INCOME link:presentationLink link:calculationLink link:definitionLink 0000005 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 0000006 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0000007 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 0000008 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0000009 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 0000010 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0000011 - Disclosure - Nature of Business link:presentationLink link:calculationLink link:definitionLink 0000012 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 0000013 - Disclosure - Revenue Recognition link:presentationLink link:calculationLink link:definitionLink 0000014 - Disclosure - Acquisitions and Dispositions link:presentationLink link:calculationLink link:definitionLink 0000015 - Disclosure - Fair Value of Financial Instruments link:presentationLink link:calculationLink link:definitionLink 0000016 - Disclosure - Accounting for Derivative Instruments and Hedging Activities link:presentationLink link:calculationLink link:definitionLink 0000017 - Disclosure - Nuclear Decommissioning Trust Fund link:presentationLink link:calculationLink link:definitionLink 0000018 - Disclosure - 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Restricted Cash (Details) link:presentationLink link:calculationLink link:definitionLink 9954502 - Disclosure - Summary of Significant Accounting Policies - Vivint Flex Pay and Capitalized Contract Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9954503 - Disclosure - Revenue Recognition - Retail Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9954504 - Disclosure - Revenue Recognition - Performance Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 9954504 - Disclosure - Revenue Recognition - Performance Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 9954505 - Disclosure - Revenue Recognition - Disaggregated Revenues (Details) link:presentationLink link:calculationLink link:definitionLink 9954506 - Disclosure - Revenue Recognition - Contract Balances (Details) link:presentationLink link:calculationLink link:definitionLink 9954507 - Disclosure - Revenue Recognition - 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Disclosure - Acquisitions and Dispositions - Income Before Income Taxes From Equity Interest in STP (Details) link:presentationLink link:calculationLink link:definitionLink 9954515 - Disclosure - Fair Value of Financial Instruments - Estimated Carrying Amounts and Fair Value of Long-term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9954516 - Disclosure - Fair Value of Financial Instruments - Assets and Liabilities Measured and Recorded at Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9954517 - Disclosure - Fair Value of Financial Instruments - Reconciliation of Level 3 Financial Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9954518 - Disclosure - Fair Value of Financial Instruments - Contractual Obligations From the Consumer Financing Program (Details) link:presentationLink link:calculationLink link:definitionLink 9954519 - Disclosure - Fair Value of Financial Instruments - Derivative Fair Value Measurements Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954520 - Disclosure - Fair Value of Financial Instruments - Significant Unobservable Inputs Used in Fair Value of Level 3 Positions (Details) link:presentationLink link:calculationLink link:definitionLink 9954521 - Disclosure - Fair Value of Financial Instruments - Counterparty Credit Risk (Details) link:presentationLink link:calculationLink link:definitionLink 9954522 - Disclosure - Fair Value of Financial Instruments - Retail Customer Credit Risk (Details) link:presentationLink link:calculationLink link:definitionLink 9954523 - Disclosure - Accounting for Derivative Instruments and Hedging Activities - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954524 - Disclosure - Accounting for Derivative Instruments and Hedging Activities - Net Notional Volume Buy/Sell of Open Derivative Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 9954525 - Disclosure - Accounting for Derivative Instruments and Hedging Activities - Fair Value Within the Derivative Instrument Valuation (Details) link:presentationLink link:calculationLink link:definitionLink 9954526 - Disclosure - Accounting for Derivative Instruments and Hedging Activities - Offsetting of Derivatives by Counterparty Master Agreement Level and Collateral Received (Details) link:presentationLink link:calculationLink link:definitionLink 9954527 - Disclosure - Accounting for Derivative Instruments and Hedging Activities - Pre-tax Effects of Economic Hedges not Designated as Cash Flow Hedges (Details) link:presentationLink link:calculationLink link:definitionLink 9954528 - Disclosure - Nuclear Decommissioning Trust Fund - Summary of Aggregate Fair Values and Realized Gains and Losses (Details) link:presentationLink link:calculationLink link:definitionLink 9954529 - Disclosure - Nuclear Decommissioning Trust Fund - Summary of Proceeds from Sale of Available-for-sale Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9954530 - Disclosure - Inventory (Details) link:presentationLink link:calculationLink link:definitionLink 9954531 - Disclosure - Property, Plant and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9954532 - Disclosure - Leases - Lease Cost and Other Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954533 - Disclosure - Leases - Annual Payments Based on the Maturities of Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9954533 - Disclosure - Leases - Annual Payments Based on the Maturities of Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9954534 - Disclosure - Asset Impairments (Details) link:presentationLink link:calculationLink link:definitionLink 9954535 - Disclosure - Goodwill and Other Intangibles - Changes in Goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 9954536 - Disclosure - Goodwill and Other Intangibles - Components of Intangible Assets Subject to Amortization (Details) link:presentationLink link:calculationLink link:definitionLink 9954537 - Disclosure - Goodwill and Other Intangibles - Schedule of Amortization and Retirement of Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9954538 - Disclosure - Goodwill and Other Intangibles - Schedule of Estimated Amortization of Intangible Asset for the Next Five Years (Details) link:presentationLink link:calculationLink link:definitionLink 9954539 - Disclosure - Goodwill and Other Intangibles - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954540 - Disclosure - Long-term Debt and Finance Leases - Schedule of Long-term Debt and Finance Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9954541 - Disclosure - Long-term Debt and Finance Leases - Annual Payments Based on the Maturities of Debt and Capital Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9954542 - Disclosure - Long-term Debt and Finance Leases - Revolving Credit Facility (Details) link:presentationLink link:calculationLink link:definitionLink 9954543 - Disclosure - Long-term Debt and Finance Leases - Senior Notes Issuance and Redemptions (Details) link:presentationLink link:calculationLink link:definitionLink 9954544 - Disclosure - Long-term Debt and Finance Leases - Senior Notes Redemptions (Details) link:presentationLink link:calculationLink link:definitionLink 9954545 - Disclosure - Long-term Debt and Finance Leases - Issuance of Convertible Senior Notes (Details) link:presentationLink link:calculationLink link:definitionLink 9954546 - Disclosure - Long-term Debt and Finance Leases - Interest Expense in Connection with Convertible Senior Notes, due 2048 (Details) link:presentationLink link:calculationLink link:definitionLink 9954547 - Disclosure - Long-term Debt and Finance Leases - Senior Notes Outstanding with Early Redemption Features (Details) link:presentationLink link:calculationLink link:definitionLink 9954548 - Disclosure - Long-term Debt and Finance Leases - Senior Notes Redemption Period (Details) link:presentationLink link:calculationLink link:definitionLink 9954549 - Disclosure - Long-term Debt and Finance Leases - Receivables Securitizations and Repurchase Facility (Details) link:presentationLink link:calculationLink link:definitionLink 9954550 - 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Disclosure - Benefit Plans and Other Postretirement Benefits - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954558 - Disclosure - Benefit Plans and Other Postretirement Benefits - Net Benefit Costs and Funded Status (Details) link:presentationLink link:calculationLink link:definitionLink 9954559 - Disclosure - Benefit Plans and Other Postretirement Benefits - Amounts Recognized in the Balance Sheets and OCI (Details) link:presentationLink link:calculationLink link:definitionLink 9954560 - Disclosure - Benefit Plans and Other Postretirement Benefits - Fair Values of Pension Assets by Asset Category and Level Within the Fair Value Hierarchy (Details) link:presentationLink link:calculationLink link:definitionLink 9954561 - Disclosure - Benefit Plans and Other Postretirement Benefits - Expected Future Benefit Payments for the Next Five Years and Other (Details) link:presentationLink link:calculationLink link:definitionLink 9954562 - Disclosure - Capital Structure - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954563 - Disclosure - Capital Structure - Changes in NRG's Common Stock Issued and Outstanding (Details) link:presentationLink link:calculationLink link:definitionLink 9954564 - Disclosure - Capital Structure - Common Stock, Share Repurchases and Retirement of Treasury Stock (Details) link:presentationLink link:calculationLink link:definitionLink 9954565 - Disclosure - Capital Structure - Summary of Changes in Shares Repurchased (Details) link:presentationLink link:calculationLink link:definitionLink 9954566 - Disclosure - Capital Structure - Preferred Stock (Details) link:presentationLink link:calculationLink link:definitionLink 9954567 - Disclosure - Investments Accounted for by the Equity Method and Variable Interest Entities - Summary of Equity Method Investments and Undistributed Earnings (Details) link:presentationLink link:calculationLink link:definitionLink 9954568 - Disclosure - Investments Accounted for by the Equity Method and Variable Interest Entities - Other Equity Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9954569 - Disclosure - Investments Accounted for by the Equity Method and Variable Interest Entities - Summarized Financial Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954570 - Disclosure - (Loss)/Income Per Share- Basic and Diluted EPS (Details) link:presentationLink link:calculationLink link:definitionLink 9954571 - Disclosure - (Loss)/Income Per Share - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954572 - Disclosure - Segment Reporting (Details) link:presentationLink link:calculationLink link:definitionLink 9954573 - Disclosure - Income Taxes - Income Tax Provision (Details) link:presentationLink link:calculationLink link:definitionLink 9954573 - Disclosure - Income Taxes - Income Tax Provision (Details) link:presentationLink link:calculationLink link:definitionLink 9954574 - Disclosure - Income Taxes - Deferred Tax Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9954574 - 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Minimum Commitments Under Outstanding Agreements (Details) link:presentationLink link:calculationLink link:definitionLink 9954588 - Disclosure - Commitments and Contingencies - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954589 - Disclosure - Regulatory Matters (Details) link:presentationLink link:calculationLink link:definitionLink 9954590 - Disclosure - Environmental Matters (Details) link:presentationLink link:calculationLink link:definitionLink 9954591 - Disclosure - Cash Flow Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954592 - Disclosure - Guarantees - Schedule of Maximum Potential Exposure (Details) link:presentationLink link:calculationLink link:definitionLink 9954593 - Disclosure - Guarantees - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954594 - Disclosure - Jointly Owned Plant (Details) link:presentationLink link:calculationLink link:definitionLink 9954595 - Disclosure - SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS (Details) link:presentationLink link:calculationLink link:definitionLink