0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 0000002 - Document - Audit Information link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Consolidated Balance Sheet link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Consolidated Balance Sheet (Parentheticals) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Consolidated Statement of Income link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Consolidated Statement of Income link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Consolidated Statement of Income link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Consolidated Statement of Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Consolidated Statement of Comprehensive Income (Parentheticals) link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Consolidated Statement of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - Consolidated Statement of Equity link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - Operations and Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Property, Plant and Equipment link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Jointly-Owned Facilities and Assets link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Regulatory Matters link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Acquisitions link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Equity Investments link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Fair Value link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Short-Term and Long-Term Debt link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Commitments, Guarantees and Contingencies link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Common Stock and Earnings Per Share link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Income Tax Expense link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Pension and Other Postretirement Benefit Plans link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Employee Stock and Incentive Plans link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - Business Segments link:presentationLink link:calculationLink link:definitionLink 9952172 - Disclosure - Agreement and Plan of Merger link:presentationLink link:calculationLink link:definitionLink 9952173 - Disclosure - Quarterly Financial Data (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952174 - Disclosure - Schedule II link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Operations and Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Operations and Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Property, Plant and Equipment (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Jointly-Owned Facilities and Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Regulatory Matters (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Acquisitions (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Equity Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Fair Value (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Short-Term and Long-Term Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Commitments, Guarantees and Contingencies (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Common Stock and Earnings Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Income Tax Expense (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Pension and Other Postretirement Benefit Plans (Tables) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Employee Stock and Incentive Plans (Tables) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Business Segment (Tables) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Quarterly Financial Data (Unaudited) (Tables) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Operations and Significant Accounting Policies - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Operations and Significant Accounting Policies - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Operations and Significant Accounting Policies - Cash, Cash Equivalents and Restricted Cash (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Operations and Significant Accounting Policies - Supplemental Statement of Cash Flows Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Operations and Significant Accounting Policies - Accounts Receivable (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Operations and Significant Accounting Policies - Inventories (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Operations and Significant Accounting Policies - Other Non-Current Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Operations and Significant Accounting Policies - Other Current Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Operations and Significant Accounting Policies - Other Non-Current Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Operations and Significant Accounting Policies - Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Operations and Significant Accounting Policies - Lease Maturities (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Operations and Significant Accounting Policies - Other Income (Expense) (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Property, Plant and Equipment - Property, Plant and Equipment and Estimated Useful Lives of Property, Plant and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Property, Plant and Equipment - Asset Retirement Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Jointly-Owned Facilities and Assets - Table (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Jointly-Owned Facilities and Assets - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Regulatory Matters - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Regulatory Matters - Regulatory Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Acquisitions - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Acquisitions - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Equity Investments - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Equity Investments - Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Fair Value - Recurring Fair Value Measures (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Fair Value - Financial Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Fair Value - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Short-Term and Long-Term Debt - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Short-Term and Long-Term Debt - Schedule of Long-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - Commitments, Guarantees and Contingencies - Minimum Payments for Certain Long-Term Commitments (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Commitments, Guarantees and Contingencies - Power Purchase Agreements (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - Commitments, Guarantees and Contingencies - Capacity and Energy Table (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - Commitments, Guarantees and Contingencies - Environmental Matters (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - Commitments, Guarantees and Contingencies - Other Matters (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - Common Stock and Earnings Per Share - Summary of Common Stock (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - Common Stock and Earnings Per Share - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - Common Stock and Earnings Per Share - Reconciliation of Basic and Diluted Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - Income Tax Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - Income Tax Expense - Reconciliation of Taxes from Federal Statutory Rate to Total Income Tax Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - Disclosure - Income Tax Expense - Deferred Income Tax Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955564 - Disclosure - Income Tax Expense - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955565 - Disclosure - Income Tax Expense - NOL and Tax Credit Carryforwards (Details) link:presentationLink link:calculationLink link:definitionLink 9955566 - Disclosure - Income Tax Expense - Gross Unrecognized Income Tax Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 9955567 - Disclosure - Pension and Other Postretirement Benefit Plans - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955568 - Disclosure - Pension and Other Postretirement Benefit Plans - Obligation and Funded Status (Details) link:presentationLink link:calculationLink link:definitionLink 9955569 - Disclosure - Pension and Other Postretirement Benefit Plans - Reconciliation of Net Pension Amounts Recognized in Consolidated Balance Sheet (Details) link:presentationLink link:calculationLink link:definitionLink 9955570 - Disclosure - Pension and Other Postretirement Benefit Plans - Components of Net Periodic Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955571 - Disclosure - Pension and Other Postretirement Benefit Plans - Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income and Regulatory Assets or Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955572 - Disclosure - Pension and Other Postretirement Benefit Plans - Information for Pension Plans with an Accumulated Benefit Obligation in Excess of Plan Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955573 - Disclosure - Pension and Other Postretirement Benefit Plans - Unrecognized Postretirement Health and Life Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955574 - Disclosure - Pension and Other Postretirement Benefit Plans - Estimated Future Benefit Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955575 - Disclosure - Pension and Other Postretirement Benefit Plans - Assumptions Used to Determine Benefit Obligation and Net Periodic Benefit Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955576 - Disclosure - Pension and Other Postretirement Benefit Plans - Plan Asset Allocations (Details) link:presentationLink link:calculationLink link:definitionLink 9955577 - Disclosure - Pension and Other Postretirement Benefit Plans - Recurring Fair Value Measures (Details) link:presentationLink link:calculationLink link:definitionLink 9955578 - Disclosure - Pension and Other Postretirement Benefit Plans - Recurring Fair Value Measures, Activity in Level 3 (Details) link:presentationLink link:calculationLink link:definitionLink 9955579 - Disclosure - Employee Stock and Incentive Plans - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955580 - Disclosure - Employee Stock and Incentive Plans - Share-Based Compensation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955581 - Disclosure - Employee Stock and Incentive Plans - Performance Shares and Restricted Stock Units (Details) link:presentationLink link:calculationLink link:definitionLink 9955582 - Disclosure - Business Segment - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955583 - Disclosure - Business Segment - By Chanel (Details) link:presentationLink link:calculationLink link:definitionLink 9955584 - Disclosure - Business Segment - By Segment (Details) link:presentationLink link:calculationLink link:definitionLink 9955585 - Disclosure - Agreement and Plan of Merger (Details) link:presentationLink link:calculationLink link:definitionLink 9955586 - Disclosure - Quarterly Financial Data (Unaudited) (Details) link:presentationLink link:calculationLink link:definitionLink 9955587 - Disclosure - Schedule II (Details) link:presentationLink link:calculationLink link:definitionLink