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INCOME TAXES - NARRATIVE (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
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Operating Loss Carryforwards [Line Items] |  |
Impact of change in tax method of accounting | $ 985.0 |
Depreciable life of self-constructed assets | 39 years |
Deferred tax assets more likely than not to be realized through future taxable earnings | $ 865.0 | $ 937.1
Loss limitation based on income of life insurance company, percent | 35.00% |
Loss limitation based on loss of non-life entities, percent | 35.00% |
Federal long-term tax exempt rate | 3.62% |
Ownership change threshold restricting NOL usage | 50.00% |
Net state operating loss carryforwards | $ 41.1 | $ 2.5
Federal |  |
Operating Loss Carryforwards [Line Items] |  |
Net federal operating loss carryforwards | $ 1,200.0 |

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