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Regulatory Matters (Tables) | 12 Months Ended
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Dec. 31, 2020
Regulatory Assets and Liabilities Disclosure [Abstract] |
Regulatory Assets | Regulatory assets were comprised of the following items:
At December 31, (in millions) | 2020 |  | 2019
Regulatory Assets |  |  |
Unrecognized pension and other postretirement benefit costs (see Note 12) | $ | 583.3 |  |  | $ | 739.1 |
Deferred pension and other postretirement benefit costs (see Note 12) | 72.4 |  |  | 91.3 |
Environmental costs (see Note 20-D) | 56.6 |  |  | 73.4 |
Regulatory effects of accounting for income taxes (see Note 1-N and Note 11) | 194.5 |  |  | 234.0 |
Under-recovered gas and fuel costs (see Note 1-J) | 8.0 |  |  | 3.9 |
Depreciation | 192.6 |  |  | 210.7 |
Post-in-service carrying charges | 228.6 |  |  | 219.8 |
Safety activity costs | 146.0 |  |  | 118.6 |
DSM programs | 37.8 |  |  | 50.1 |
Bailly Generating Station | 204.7 |  |  | 221.8 |
Losses on Commodity Price Risk Programs (See Note 10) | 54.7 |  |  | 76.4 |
Deferred Property Taxes | 62.9 |  |  | 60.3 |
Other | 88.4 |  |  | 140.2 |
Total Regulatory Assets | $ | 1,930.5 |  |  | $ | 2,239.6 |
Less: Current Portion | 135.7 |  |  | 225.7 |
Total Noncurrent Regulatory Assets | $ | 1,794.8 |  |  | $ | 2,013.9 |
Regulatory Liabilities | Regulatory liabilities were comprised of the following items:
At December 31, (in millions) | 2020 |  | 2019
Regulatory Liabilities |  |  |
Over-recovered gas and fuel costs (see Note 1-J) | $ | 47.8 |  |  | $ | 42.6 |
Cost of removal (see Note 8) | 775.2 |  |  | 1,047.5 |
Regulatory effects of accounting for income taxes (see Note 1-N and Note 11) | 1,105.1 |  |  | 1,307.0 |
Deferred pension and other postretirement benefit costs (see Note 12) | 69.5 |  |  | 64.7 |
Other | 67.9 |  |  | 50.4 |
Total Regulatory Liabilities | $ | 2,065.5 |  |  | $ | 2,512.2 |
Less: Current Portion | 161.3 |  |  | 160.2 |
Total Noncurrent Regulatory Liabilities | $ | 1,904.2 |  |  | $ | 2,352.0 |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 715 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501251&loc=d3e52485-110419 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44264-110382 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 405 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394 + Details
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