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VARIABLE INTEREST ENTITIES - Narrative (Details) - USD ($) $ in Millions | 1 Months Ended |  |
--- | --- | --- | ---
Aug. 31, 2025 | Sep. 30, 2025 | Dec. 31, 2024
Schedule of Equity Method Investments [Line Items] |  |  |
Long-term Debt Due Within One Year |  | $ 1,898.6 | $ 3,335.0
Long-term Debt |  | 44,239.0 | 39,307.8
Equity method investments |  | 1,235.8 | $ 1,055.9
Gigawatt.AI |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Payments to acquire equity method investments | $ 100.0 |  |
Equity method investment, ownership percentage | 10.00% |  |
Contingent consideration, additional investment in equity method investment | $ 100.0 |  |
Additional ownership percentage | 10.00% |  |
Equity method investments | $ 100.0 | 100.0 |
Gigawatt.AI | Gigawatt AI Warrant |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Percentage of ownership in investment called by warrants | 5.00% |  |
Amount of investment called by warrant | $ 50.0 |  |
Variable Interest Entity, Primary Beneficiary |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Securitization Bonds |  | 465.0 |
Variable Interest Entity, Primary Beneficiary | Secured Debt |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Long-term Debt Due Within One Year |  | 16.0 |
Long-term Debt |  | $ 452.0 |

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