0000001 - Document - COVER PAGE link:presentationLink link:calculationLink link:definitionLink 0000002 - Statement - CONDENSED CONSOLIDATED INCOME STATEMENTS link:presentationLink link:calculationLink link:definitionLink 0000003 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME link:presentationLink link:calculationLink link:definitionLink 0000004 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 0000005 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0000006 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 0000007 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0000008 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF EQUITY link:presentationLink link:calculationLink link:definitionLink 0000009 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0000010 - Disclosure - GENERAL INFORMATION link:presentationLink link:calculationLink link:definitionLink 0000011 - Disclosure - ACQUISITIONS link:presentationLink link:calculationLink link:definitionLink 0000012 - Disclosure - DISPOSITIONS link:presentationLink link:calculationLink link:definitionLink 0000013 - Disclosure - OPERATING REVENUES link:presentationLink link:calculationLink link:definitionLink 0000014 - Disclosure - CREDIT LOSSES link:presentationLink link:calculationLink link:definitionLink 0000015 - Disclosure - REGULATORY ASSETS AND LIABILITIES link:presentationLink link:calculationLink link:definitionLink 0000016 - Disclosure - PROPERTY, PLANT, AND EQUIPMENT link:presentationLink link:calculationLink link:definitionLink 0000017 - Disclosure - ASSET RETIREMENT OBLIGATIONS link:presentationLink link:calculationLink link:definitionLink 0000018 - Disclosure - COMMON EQUITY link:presentationLink link:calculationLink link:definitionLink 0000019 - Disclosure - SHORT-TERM DEBT AND LINES OF CREDIT link:presentationLink link:calculationLink link:definitionLink 0000020 - Disclosure - LONG-TERM DEBT link:presentationLink link:calculationLink link:definitionLink 0000021 - Disclosure - LEASES link:presentationLink link:calculationLink link:definitionLink 0000022 - Disclosure - MATERIALS, SUPPLIES, AND INVENTORIES link:presentationLink link:calculationLink link:definitionLink 0000023 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 0000024 - Disclosure - FAIR VALUE MEASUREMENTS link:presentationLink link:calculationLink link:definitionLink 0000025 - Disclosure - DERIVATIVE INSTRUMENTS link:presentationLink link:calculationLink link:definitionLink 0000026 - Disclosure - GUARANTEES link:presentationLink link:calculationLink link:definitionLink 0000027 - Disclosure - EMPLOYEE BENEFITS link:presentationLink link:calculationLink link:definitionLink 0000028 - Disclosure - GOODWILL AND INTANGIBLES link:presentationLink link:calculationLink link:definitionLink 0000029 - Disclosure - INVESTMENT IN TRANSMISSION AFFILIATES link:presentationLink link:calculationLink link:definitionLink 0000030 - Disclosure - SEGMENT INFORMATION link:presentationLink link:calculationLink link:definitionLink 0000031 - Disclosure - VARIABLE INTEREST ENTITIES link:presentationLink link:calculationLink link:definitionLink 0000032 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 0000033 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION link:presentationLink link:calculationLink link:definitionLink 0000034 - Disclosure - REGULATORY ENVIRONMENT link:presentationLink link:calculationLink link:definitionLink 0000035 - Disclosure - NEW ACCOUNTING PRONOUNCEMENTS link:presentationLink link:calculationLink link:definitionLink 9954471 - Disclosure - GENERAL INFORMATION (Policies) link:presentationLink link:calculationLink link:definitionLink 9954472 - Disclosure - OPERATING REVENUES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954473 - Disclosure - CREDIT LOSSES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954474 - Disclosure - REGULATORY ASSETS AND LIABILITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954475 - Disclosure - ASSET RETIREMENT OBLIGATIONS (Tables) link:presentationLink link:calculationLink link:definitionLink 9954476 - Disclosure - COMMON EQUITY (Tables) link:presentationLink link:calculationLink link:definitionLink 9954477 - Disclosure - SHORT-TERM DEBT AND LINES OF CREDIT (Tables) link:presentationLink link:calculationLink link:definitionLink 9954478 - Disclosure - LONG-TERM DEBT (Tables) link:presentationLink link:calculationLink link:definitionLink 9954479 - Disclosure - LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954480 - Disclosure - MATERIALS, SUPPLIES, AND INVENTORIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954481 - Disclosure - INCOME TAXES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954482 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9954483 - Disclosure - DERIVATIVE INSTRUMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9954484 - Disclosure - GUARANTEES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954485 - Disclosure - EMPLOYEE BENEFITS (Tables) link:presentationLink link:calculationLink link:definitionLink 9954486 - Disclosure - GOODWILL AND INTANGIBLES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954487 - Disclosure - INVESTMENT IN TRANSMISSION AFFILIATES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954488 - Disclosure - SEGMENT INFORMATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9954489 - Disclosure - VARIABLE INTEREST ENTITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954490 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9954491 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9954492 - Disclosure - REGULATORY ENVIRONMENT - (Tables) link:presentationLink link:calculationLink link:definitionLink 9954493 - Disclosure - GENERAL INFORMATION - GENERAL (Details) link:presentationLink link:calculationLink link:definitionLink 9954494 - Disclosure - GENERAL INFORMATION - INVESTMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 9954495 - Disclosure - ACQUISITIONS - WEST RIVERSIDE (Details) link:presentationLink link:calculationLink link:definitionLink 9954496 - Disclosure - ACQUISITIONS - RED BARN (Details) link:presentationLink link:calculationLink link:definitionLink 9954497 - Disclosure - ACQUISITIONS - WHITEWATER (Details) link:presentationLink link:calculationLink link:definitionLink 9954498 - Disclosure - ACQUISITIONS - MAPLE FLATS SOLAR (Details) link:presentationLink link:calculationLink link:definitionLink 9954499 - Disclosure - ACQUISITIONS - SAPPHIRE SKY (Details) link:presentationLink link:calculationLink link:definitionLink 9954500 - Disclosure - ACQUISITIONS - DELILAH I (Details) link:presentationLink link:calculationLink link:definitionLink 9954501 - Disclosure - ACQUISITIONS - SAMSON I (Details) link:presentationLink link:calculationLink link:definitionLink 9954502 - Disclosure - DISPOSITIONS - WE (Details) link:presentationLink link:calculationLink link:definitionLink 9954503 - Disclosure - OPERATING REVENUES - DISAGGREGATION OF OPERATING REVENUES BY SEGMENT (Details) link:presentationLink link:calculationLink link:definitionLink 9954504 - Disclosure - OPERATING REVENUES - DISAGGREGATION OF ELECTRIC UTILITY OPERATING REVENUES BY CUSTOMER CLASS (Details) link:presentationLink link:calculationLink link:definitionLink 9954505 - Disclosure - OPERATING REVENUES - DISAGGREGATION OF NATURAL GAS UTILITY OPERATING REVENUES BY CUSTOMER CLASS (Details) link:presentationLink link:calculationLink link:definitionLink 9954506 - Disclosure - OPERATING REVENUES - OTHER NON-UTILITY OPERATING REVENUES (Details) link:presentationLink link:calculationLink link:definitionLink 9954507 - Disclosure - OPERATING REVENUES - OTHER OPERATING REVENUES (Details) link:presentationLink link:calculationLink link:definitionLink 9954508 - Disclosure - CREDIT LOSSES - GROSS RECEIVABLES AND RELATED ALLOWANCES (Details) link:presentationLink link:calculationLink link:definitionLink 9954509 - Disclosure - CREDIT LOSSES - ROLLFORWARD OF ALLOWANCES (Details) link:presentationLink link:calculationLink link:definitionLink 9954510 - Disclosure - REGULATORY ASSETS AND LIABILITIES - REGULATORY ASSETS (Details) link:presentationLink link:calculationLink link:definitionLink 9954511 - Disclosure - REGULATORY ASSETS AND LIABILITIES - REGULATORY LIABILITIES (Details) link:presentationLink link:calculationLink link:definitionLink 9954512 - Disclosure - REGULATORY ASSETS AND LIABILITIES - PLANT RETIREMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 9954513 - Disclosure - PROPERTY, PLANT, AND EQUIPMENT - PLANT TO BE RETIRED (Details) link:presentationLink link:calculationLink link:definitionLink 9954514 - Disclosure - PROPERTY, PLANT, AND EQUIPMENT - SAMSON I SOLAR ENERGY CENTER LLC (Details) link:presentationLink link:calculationLink link:definitionLink 9954515 - Disclosure - ASSET RETIREMENT OBLIGATIONS (Details) link:presentationLink link:calculationLink link:definitionLink 9954516 - Disclosure - COMMON EQUITY - STOCK-BASED COMPENSATION AWARDS GRANTED (Details) link:presentationLink link:calculationLink link:definitionLink 9954517 - Disclosure - COMMON EQUITY - COMMON STOCK ISSUED (Details) link:presentationLink link:calculationLink link:definitionLink 9954518 - Disclosure - COMMON EQUITY - COMMON STOCK DIVIDENDS (Details) link:presentationLink link:calculationLink link:definitionLink 9954519 - Disclosure - SHORT-TERM DEBT AND LINES OF CREDIT - SHORT-TERM BORROWINGS (Details) link:presentationLink link:calculationLink link:definitionLink 9954520 - Disclosure - SHORT-TERM DEBT AND LINES OF CREDIT - REVOLVING CREDIT FACILITIES (Details) link:presentationLink link:calculationLink link:definitionLink 9954521 - Disclosure - LONG-TERM DEBT (Details) link:presentationLink link:calculationLink link:definitionLink 9954522 - Disclosure - LEASES - LAND LEASES - RENEGADE (Details) link:presentationLink link:calculationLink link:definitionLink 9954523 - Disclosure - LEASES - RENEGADE FUTURE MINIMUM LEASE PAYMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 9954524 - Disclosure - LEASES - KOSHKONONG (Details) link:presentationLink link:calculationLink link:definitionLink 9954525 - Disclosure - MATERIALS, SUPPLIES, AND INVENTORIES (Details) link:presentationLink link:calculationLink link:definitionLink 9954526 - Disclosure - INCOME TAXES (Details) link:presentationLink link:calculationLink link:definitionLink 9954527 - Disclosure - FAIR VALUE MEASUREMENTS - ASSETS AND LIABILITIES MEASURED ON A RECURRING BASIS (Details) link:presentationLink link:calculationLink link:definitionLink 9954528 - Disclosure - FAIR VALUE MEASUREMENTS - UNREALIZED GAIN OR LOSS ON INVESTMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 9954529 - Disclosure - FAIR VALUE MEASUREMENTS - LEVEL 3 RECONCILIATION (Details) link:presentationLink link:calculationLink link:definitionLink 9954530 - Disclosure - FAIR VALUE MEASUREMENTS - FINANCIAL INSTRUMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 9954531 - Disclosure - DERIVATIVE INSTRUMENTS - DERIVATIVE ASSETS AND LIABILITIES (Details) link:presentationLink link:calculationLink link:definitionLink 9954532 - Disclosure - DERIVATIVE INSTRUMENTS - GAINS (LOSSES) AND NOTIONAL VOLUMES (Details) link:presentationLink link:calculationLink link:definitionLink 9954533 - Disclosure - DERIVATIVE INSTRUMENTS - BALANCE SHEET OFFSETTING (Details) link:presentationLink link:calculationLink link:definitionLink 9954534 - Disclosure - GUARANTEES (Details) link:presentationLink link:calculationLink link:definitionLink 9954535 - Disclosure - EMPLOYEE BENEFITS-COSTS AND CONTRIBUTIONS (Details) link:presentationLink link:calculationLink link:definitionLink 9954536 - Disclosure - GOODWILL AND INTANGIBLES - GOODWILL (Details) link:presentationLink link:calculationLink link:definitionLink 9954537 - Disclosure - GOODWILL AND INTANGIBLES - INDEFINITE LIVED INTANGIBLE ASSETS (Details) link:presentationLink link:calculationLink link:definitionLink 9954538 - Disclosure - GOODWILL AND INTANGIBLES - INTANGIBLE LIABILITIES (Details) link:presentationLink link:calculationLink link:definitionLink 9954539 - Disclosure - INVESTMENT IN TRANSMISSION AFFILIATES - CHANGES TO INVESTMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 9954540 - Disclosure - INVESTMENT IN TRANSMISSION AFFILIATES - RELATED PARTY TRANSACTIONS (Details) link:presentationLink link:calculationLink link:definitionLink 9954541 - Disclosure - INVESTMENT IN TRANSMISSION AFFILIATES - RECEIVABLES AND PAYABLES (Details) link:presentationLink link:calculationLink link:definitionLink 9954542 - Disclosure - INVESTMENT IN TRANSMISSION AFFILIATES - SUMMARIZED FINANCIAL DATA (Details) link:presentationLink link:calculationLink link:definitionLink 9954543 - Disclosure - SEGMENT INFORMATION (Details) link:presentationLink link:calculationLink link:definitionLink 9954544 - Disclosure - VARIABLE INTEREST ENTITIES - WEPCO ENVIRONMENTAL TRUST (Details) link:presentationLink link:calculationLink link:definitionLink 9954545 - Disclosure - VARIABLE INTEREST ENTITIES - TRANSMISSION AFFILIATES (Details) link:presentationLink link:calculationLink link:definitionLink 9954546 - Disclosure - COMMITMENTS AND CONTINGENCIES - UNCONDITIONAL PURCHASE OBLIGATIONS (Details) link:presentationLink link:calculationLink link:definitionLink 9954547 - Disclosure - COMMITMENTS AND CONTINGENCIES - ENVIRONMENTAL MATTERS (Details) link:presentationLink link:calculationLink link:definitionLink 9954548 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION - SUPPLEMENTAL INFORMATION (Details) link:presentationLink link:calculationLink link:definitionLink 9954549 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION - RECONCILIATION OF CASH, CASH EQUIVALENTS, AND RESTRICTED CASH (Details) link:presentationLink link:calculationLink link:definitionLink 9954550 - Disclosure - REGULATORY ENVIRONMENT - WI 2025 and 2026 Rates (Details) link:presentationLink link:calculationLink link:definitionLink 9954551 - Disclosure - REGULATORY ENVIRONMENT - PGL AND NSG 2023 RATE ORDER (Details) link:presentationLink link:calculationLink link:definitionLink 9954552 - Disclosure - REGULATORY ENVIRONMENT - PGL AND NSG UEA RIDER (Details) link:presentationLink link:calculationLink link:definitionLink 9954553 - Disclosure - REGULATORY ENVIRONMENT - PGL QIP RIDER (Details) link:presentationLink link:calculationLink link:definitionLink 9954554 - Disclosure - REGULATORY ENVIRONMENT - 2023 MERC RATE ORDER (Details) link:presentationLink link:calculationLink link:definitionLink 9954555 - Disclosure - REGULATORY ENVIRONMENT - 2024 MGU RATE CASE (Details) link:presentationLink link:calculationLink link:definitionLink 9954556 - Disclosure - REGULATORY ENVIRONMENT - UMERC 2024 RATE CASE (Details) link:presentationLink link:calculationLink link:definitionLink