0000001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - CONSOLIDATED BALANCE SHEETS (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 9952156 - Disclosure - Management's Opinion link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - Accounting Pronouncements link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Selected Balance Sheet Data link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Debt link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Revenues link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Earnings Per Share link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Fair Value of Financial Assets and Liabilities link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Benefit Plans and Other Postretirement Benefits link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Other Comprehensive Income (Loss) link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Segment Information link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Selected Balance Sheet Data (Tables) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Borrowings and Other Financing Instruments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Revenues (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Fair Value of Financial Assets and Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Benefit Plans and Other Postretirement Benefits (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Commitment and Contingencies (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Other Comprehensive Income (Loss) (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Selected Balance Sheet Data Selected Balance Sheet Data, Accounts Receivable (Details) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Selected Balance Sheet Data Selected Balance Sheet Data, Inventories (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Selected Balance Sheet Data, Property, Plant and Equipment, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Short-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Letters of Credit (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Borrowings and Other Financing Instruments Revolving Credit Facilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Borrowings and Other Financing Instruments Term Loan (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Borrowings and Other Financing Instruments Bilateral Credit Agreement (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Borrowings and Other Financing Instruments Long-Term Borrowings (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Borrowings and Other Financing Instruments Equity through DRIP and Benefits Program (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Borrowings and Other Financing Instruments Forward Equity Agreements (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Borrowings and Other Financing Instruments Debt Repurchase (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Revenues (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Common Stock Equivalents (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Non-Derivative Fair Value Measurements (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Rabbi Trust (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Interest Rate Derivatives (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Interest Rate Derivatives (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Commodity Derivatives (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Consideration of Credit Risk and Concentrations (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Credit Related Contingent Features (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Recurring Fair Value Measurements (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Recurring Fair Value Measurements (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Fair Value of Long-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Benefit Plans and Other Postretirement Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - MGP, Landfill and Disposal Sites (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Commitments and Contingencies Environmental Requirements - Water and Waste (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Variable Interest Entities (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Commitments and Contingencies Guarantees and Bond Indemnifications (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Commitments and Contingencies - Marshall Wildfire (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Commitment and Contingencies - Smokehouse Creek (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Commitments and Contingencies - Cabin Creek (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - Commitments and Contingencies (Details) - PI Outage Prudency Review link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Other Comprehensive Income (Loss) (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - Segment Information (Details) link:presentationLink link:calculationLink link:definitionLink