CREDIT LOSSES - ROLLFORWARD OF ALLOWANCES (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Accounts Receivable, Allowance for Credit Loss [Roll Forward] | ||||
| Change in allowance for credit losses | $ (15.2) | |||
| Utility segment | ||||
| Accounts Receivable, Allowance for Credit Loss [Roll Forward] | ||||
| Balance at beginning of period | $ 37.7 | $ 32.9 | $ 39.7 | 46.9 |
| Provision for credit losses | 46.4 | 17.5 | 137.3 | 47.2 |
| Write-offs charged against the allowance | (27.0) | (27.5) | (84.7) | (79.5) |
| Recoveries of amounts previously written off | 7.2 | 7.0 | 24.5 | 23.3 |
| Balance at end of period | 35.0 | 31.7 | 35.0 | 31.7 |
| Utility segment | Uncollectible expense | ||||
| Accounts Receivable, Allowance for Credit Loss [Roll Forward] | ||||
| Provision for credit losses deferred for future recovery or refund | $ (29.3) | $ 1.8 | $ (81.8) | $ (6.2) |