v3.26.1
LONG-TERM DEBT (Details) - WPS 4.25% $300M Senior Notes due January 15, 2031
$ in Millions
1 Months Ended
Jan. 31, 2026
USD ($)
Debt Instrument [Line Items]  
Proceeds from issuance of debt $ 300.0
Debt instrument stated interest rate percentage 4.25%