0000001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Consolidated Statements of Operations and Comprehensive Income, Parent link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Consolidated Statements of Cash Flows, Parent link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Consolidated Balance Sheets, Parent link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Consolidated Balance Sheets, Parent (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Consolidated Statements of Changes in Equity, Parent link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Consolidated Statements of Changes in Equity, Parent (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - Consolidated Statements of Operations and Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 9952158 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952159 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 9952160 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952161 - Statement - Consolidated Statement of Changes in Equity link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Basis of Presentation link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Mergers, Acquisitions, and Dispositions link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Regulatory Matters link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Revenue from Contracts with Customers link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Segment Information link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Government Assistance link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Accounts Receivable link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Nuclear Decommissioning link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - Retirement Benefits link:presentationLink link:calculationLink link:definitionLink 9952172 - Disclosure - Derivative Financial Instruments link:presentationLink link:calculationLink link:definitionLink 9952173 - Disclosure - Debt and Credit Agreements link:presentationLink link:calculationLink link:definitionLink 9952174 - Disclosure - Fair Value of Financial Assets and Liabilities link:presentationLink link:calculationLink link:definitionLink 9952175 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 9952176 - Disclosure - Shareholders' Equity link:presentationLink link:calculationLink link:definitionLink 9952177 - Disclosure - Variable Interest Entities link:presentationLink link:calculationLink link:definitionLink 9952178 - Disclosure - Supplemental Financial Information link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Basis of Presentation (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Revenue from Contracts with Customers (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Accounts Receivable (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Nuclear Decommissioning (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Retirement Benefits (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Derivative Financial Instruments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Debt and Credit Agreements (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Fair Value of Financial Assets and Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Commitments and Contingencies (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Shareholders' Equity (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Variable Interest Entities (Tables) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Supplemental Financial Information (Tables) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Basis of Presentation (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Mergers, Acquisitions, and Dispositions - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Regulatory Matters (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Revenue from Contracts with Customers - Performance Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Revenue from Contracts with Customers - Performance Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Revenue from Contracts with Customers - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Segment Information - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Segment Information - Generation Total Revenues (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Government Assistance (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Accounts Receivable - Allowance for Credit Losses (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Accounts Receivable - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Accounts Receivable - Purchases and Sales of Accounts Receivable (Detail) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Nuclear Decommissioning - Nuclear Decommissioning Asset Retirement Obligation Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Nuclear Decommissioning - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Nuclear Decommissioning - Noncurrent Related Party Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Income Taxes - Reconciliation to Effective Tax Rate (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Income Taxes - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Retirement Benefits - Net Benefit Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Derivative Financial Instruments - Summary of Derivative Fair Value Balances (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Derivative Financial Instruments - Commodity Derivatives (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Derivative Financial Instruments - Summary of Economic Hedges (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Derivative Financial Instruments - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Derivative Financial Instruments - Summary of Credit Risk Exposure (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Derivative Financial Instruments - Summary of Credit Risk Related Contingent Features (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Derivative Financial Instruments - Summary of Cash Collateral and Letters of Credit (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Debt and Credit Agreements - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Debt and Credit Agreements - Summary of Bank Commitments, Credit Facility Borrowings and Available Capacity (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Debt and Credit Agreements - Short Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Debt and Credit Agreements - Summary of Outstanding Long-term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - Fair Value of Financial Assets and Liabilities - Fair Value of Financial Liabilities Recorded at Amortized Cost (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Fair Value of Financial Assets and Liabilities - Fair Value Measurement of Assets and Liabilities, Recurring (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - Fair Value of Financial Assets and Liabilities - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - Fair Value of Financial Assets and Liabilities - Fair Value Reconciliation of Level 3 Assets and Liabilities Measured on a Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - Fair Value of Financial Assets and Liabilities - Fair Value Assets and Liabilities Measure on a Recurring Basis Gain Loss Included in Earnings (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - Fair Value of Financial Assets and Liabilities - Fair Value Inputs Assets Quantitative Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - Commitments and Contingencies - Schedule of Commercial Commitments (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - Commitments and Contingencies - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - Shareholders' Equity - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - Shareholders' Equity - ASR Agreement (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - Disclosure - Shareholders' Equity - Schedule of Changes in AOCI (Details) link:presentationLink link:calculationLink link:definitionLink 9955564 - Disclosure - Shareholders' Equity - Income Taxes Allocated to Other Comprehensive Income (Loss) Components (Details) link:presentationLink link:calculationLink link:definitionLink 9955565 - Disclosure - Variable Interest Entities - Assets and Liabilities of Consolidated VIEs (Details) link:presentationLink link:calculationLink link:definitionLink 9955566 - Disclosure - Variable Interest Entities - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955567 - Disclosure - Variable Interest Entities - Summary of Significant Unconsolidated VIEs (Details) link:presentationLink link:calculationLink link:definitionLink 9955568 - Disclosure - Supplemental Financial Information - Summary of Taxes other than income (Details) link:presentationLink link:calculationLink link:definitionLink 9955569 - Disclosure - Supplemental Financial Information - Summary of Other Income (Expense) (Details) link:presentationLink link:calculationLink link:definitionLink 9955570 - Disclosure - Supplemental Financial Information - Supplemental Cash Flow Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955571 - Disclosure - Supplemental Financial Information - Supplemental Balance Sheet Information (Details) link:presentationLink link:calculationLink link:definitionLink