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Regulatory Matters (Tables) | 12 Months Ended
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Dec. 31, 2023
Regulatory Assets and Liabilities Disclosure [Abstract] |
Regulatory Assets | Regulatory assets were comprised of the following items:
At December 31, (in millions) | 2023 |  | 2022
Regulatory Assets |  |  |
Unrecognized pension and other postretirement benefit costs (see Note 16) | $ | 561.6 |  |  | $ | 607.5 |
Deferred pension and other postretirement benefit costs (see Note 16) | 59.7 |  |  | 72.2 |
Environmental costs (see Note 19-D.) | 40.6 |  |  | 41.4 |
Regulatory effects of accounting for income taxes (see Note 1-N. and Note 15) | 163.5 |  |  | 158.0 |
Under-recovered gas and fuel costs (see Note 1-J.) | 12.7 |  |  | 85.5 |
Depreciation | 201.9 |  |  | 191.3 |
Post-in-service carrying charges | 269.9 |  |  | 251.5 |
Safety activity costs | 206.6 |  |  | 200.7 |
DSM programs | 25.0 |  |  | 37.5 |
Retired coal generating stations | 682.0 |  |  | 744.0 |
Losses on commodity price risk programs (See Note 13) | 24.4 |  |  | 10.0 |
Deferred property taxes | 72.3 |  |  | 68.5 |
Renewable energy investments (See Note 1-S. and Note 4) | 60.8 |  |  | 37.7 |
Other | 79.2 |  |  | 75.0 |
Total Regulatory Assets | $ | 2,460.2 |  |  | $ | 2,580.8 |
Less: Current Portion | 214.3 |  |  | 233.2 |
Total Noncurrent Regulatory Assets | $ | 2,245.9 |  |  | $ | 2,347.6 |
Regulatory Liabilities | Regulatory liabilities were comprised of the following items:
At December 31, (in millions) | 2023 |  | 2022
Regulatory Liabilities |  |  |
Over-recovered gas and fuel costs (see Note 1-J.) | $ | 144.5 |  |  | $ | 20.6 |
Cost of removal (see Note 11) | 597.2 |  |  | 675.9 |
Regulatory effects of accounting for income taxes (see Note 1-N. and Note 15) | 849.9 |  |  | 996.3 |
Deferred pension and other postretirement benefit costs (see Note 16) | 54.0 |  |  | 66.8 |
Gains on commodity price risk programs (See Note 13) | 23.3 |  |  | 90.0 |
Customer Assistance Programs | 19.8 |  |  | 32.9 |
Off-Systems sales sharing | 19.0 |  |  | 12.3 |
HLBV Adjustments under ASC 980 | 18.1 |  |  | 5.4 |
Rate Refunds | 16.1 |  |  | 51.4 |
Other | 47.4 |  |  | 61.0 |
Total Regulatory Liabilities | $ | 1,789.3 |  |  | $ | 2,012.6 |
Less: Current Portion | 278.6 |  |  | 236.8 |
Total Noncurrent Regulatory Liabilities | $ | 1,510.7 |  |  | $ | 1,775.8 |

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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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