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OPERATING REVENUES - OTHER NON-UTILITY OPERATING REVENUES (Details) - Revenues from contracts with customers - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Operating Revenues
Revenues from contracts with customers	$ 2,088.3	$ 1,854.3	$ 7,189.1	$ 6,202.2
Other non-utility revenues
Disaggregation of Operating Revenues
Revenues from contracts with customers	66.4	51.2	191.4	167.0
Other non-utility revenues | We Power revenues
Disaggregation of Operating Revenues
Revenues from contracts with customers	6.2	6.1	18.4	18.2
Transferred over time | Other non-utility revenues | Renewable generation revenues
Disaggregation of Operating Revenues
Revenues from contracts with customers	54.7	40.0	156.6	133.8
Transferred over time | Other non-utility revenues | Appliance service revenues
Disaggregation of Operating Revenues
Revenues from contracts with customers	$ 5.5	$ 5.1	$ 16.4	$ 15.0

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