OPERATING REVENUES - DISAGGREGATION OF NATURAL GAS UTILITY OPERATING REVENUES BY CUSTOMER CLASS (Details) - Revenues from contracts with customers - Utility segment - Transferred over time - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Operating Revenues
Revenues from contracts with customers	$ 400.6	$ 411.0	$ 1,164.7	$ 1,282.2
Natural gas
Disaggregation of Operating Revenues
Revenues from contracts with customers	42.0	40.9	219.0	272.3
Natural gas \| Total retail
Disaggregation of Operating Revenues
Revenues from contracts with customers	31.2	32.0	195.8	263.5
Natural gas \| Residential
Disaggregation of Operating Revenues
Revenues from contracts with customers	21.0	21.2	128.2	167.9
Natural gas \| Commercial and industrial
Disaggregation of Operating Revenues
Revenues from contracts with customers	10.2	10.8	67.6	95.6
Natural gas \| Transportation
Disaggregation of Operating Revenues
Revenues from contracts with customers	4.6	4.4	16.4	16.2
Natural gas \| Other utility
Disaggregation of Operating Revenues
Revenues from contracts with customers	$ 6.2	$ 4.5	$ 6.8	$ (7.4)

WISCONSIN PUBLIC SERVICE CORP 10-Q