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REGULATORY ASSETS AND LIABILITIES (Tables) | 3 Months Ended
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Mar. 31, 2024
Regulatory Assets and Liabilities Disclosure [Abstract] |
Schedule of regulatory assets |
(in millions) |  | March 31, 2024 |  | December 31, 2023
Regulatory assets |  |  |  |
Pension and OPEB costs |  | $ | 728.9 |  |  | $ | 731.7 |
Plant retirement related items |  | 637.8 |  |  | 646.2 |
Environmental remediation costs |  | 583.8 |  |  | 596.8 |
Income tax related items |  | 444.5 |  |  | 449.9 |
AROs |  | 159.8 |  |  | 162.0 |
Uncollectible expense |  | 133.7 |  |  | 127.7 |
System support resource |  | 110.6 |  |  | 113.2 |
Derivatives |  | 88.7 |  |  | 130.3 |
Decoupling |  | 87.2 |  |  | 27.3 |
Securitization |  | 84.1 |  |  | 85.9 |
Bluewater |  | 51.1 |  |  | 45.3 |
Energy efficiency programs |  | 29.3 |  |  | 33.9 |
Other, net |  | 147.4 |  |  | 124.5 |
Total regulatory assets |  | $ | 3,286.9 |  |  | $ | 3,274.7 |
Balance sheet presentation |  |  |  |
Other current assets |  | $ | 39.9 |  |  | $ | 24.9 |
Regulatory assets |  | 3,247.0 |  |  | 3,249.8 |
Total regulatory assets |  | $ | 3,286.9 |  |  | $ | 3,274.7 |
Schedule of regulatory liabilities |
(in millions) |  | March 31, 2024 |  | December 31, 2023
Regulatory liabilities |  |  |  |
Income tax related items |  | $ | 1,862.6 |  |  | $ | 1,901.8 |
Removal costs |  | 1,365.4 |  |  | 1,329.9 |
Pension and OPEB benefits |  | 300.0 |  |  | 299.2 |
Energy costs refundable through rate adjustments |  | 119.3 |  |  | 72.4 |
Electric transmission costs |  | 31.0 |  |  | 30.3 |
Energy efficiency programs |  | 20.6 |  |  | 17.2 |
Uncollectible expense |  | 19.0 |  |  | 21.2 |
Derivatives |  | 15.2 |  |  | 19.2 |
Other, net |  | 76.3 |  |  | 54.0 |
Total regulatory liabilities |  | $ | 3,809.4 |  |  | $ | 3,745.2 |
Balance sheet presentation |  |  |  |
Other current liabilities |  | $ | 79.2 |  |  | $ | 47.5 |
Regulatory liabilities |  | 3,730.2 |  |  | 3,697.7 |
Total regulatory liabilities |  | $ | 3,809.4 |  |  | $ | 3,745.2 |

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- Definition Tabular disclosure of assets that are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481878/980-340-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 980 -SubTopic 715 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481691/980-715-50-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481878/980-340-50-2 + Details
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- Definition Tabular disclosure of regulatory liabilities. Detailed information about liabilities that result from rate actions of a regulator. Rate actions of a regulator can impose a liability on a regulated enterprise resulting in a regulatory liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 405 -Name Accounting Standards Codification -Section 25 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481854/980-405-25-1 + Details
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