v3.26.3
CREDIT LOSSES - ROLLFORWARD OF ALLOWANCES (Details) - Utility segment - 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]        
Balance at beginning of period $ 7.8 $ 7.4 $ 7.8 $ 8.6
Provision for credit losses 4.9 4.3 13.2 12.8
Write-offs charged against the allowance (3.6) (3.6) (11.4) (10.6)
Recoveries of amounts previously written off 0.9 1.0 3.5 3.6
Balance at end of period 8.3 7.4 8.3 7.4
Uncollectible expense        
Accounts Receivable, Allowance for Credit Loss [Roll Forward]        
Provision for credit losses deferred for future recovery or refund $ (1.7) $ (1.7) $ (4.8) $ (7.0)