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INCOME TAXES - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income taxes |  |  |
Income deduction, amount | $ 169.7 | $ 128.0 | $ 125.5
TCJA refund | 92.5 |  |
Unrecognized tax benefits that would impact effective tax rate | 5.0 |  |
Federal |  |  |
Income taxes |  |  |
Net operating loss resulting from repairs and maintenance deductions | 93.3 |  |
State |  |  |
Income taxes |  |  |
Net operating loss resulting from repairs and maintenance deductions | $ 184.0 |  |

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- Definition Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations attributable to deduction. Includes, but is not limited to, dividend deduction, deduction for dividend paid to employee stock ownership plan (ESOP), Medicare prescription drug benefit subsidy deduction, and other deductions. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-12 + Details
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