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OPERATING REVENUES
 3 Months Ended
Mar. 31, 2025
Revenue from Contract with Customer [Abstract]  
OPERATING REVENUES OPERATING REVENUES
For more information about our operating revenues, see Note 1(d), Operating Revenues, in our 2024 Annual Report on Form 10-K.

Disaggregation of Operating Revenues

The following tables present our operating revenues disaggregated by revenue source. We do not have any revenues associated with our electric transmission segment, which includes investments accounted for using the equity method. We disaggregate revenues into categories that depict how the nature, amount, timing, and uncertainty of revenues and cash flows are affected by economic factors. For our segments, revenues are further disaggregated by electric and natural gas operations and then by customer class. Each customer class within our electric and natural gas operations has different expectations of service, energy and demand requirements, and can be impacted differently by regulatory activities within their jurisdictions.
(in millions)WisconsinIllinoisOther StatesTotal Utility OperationsNon-Utility Energy InfrastructureCorporate and OtherReconciling EliminationsWEC Energy Group Consolidated
Three Months Ended March 31, 2025      
Electric$1,320.0 $— $— $1,320.0 $— $— $— $1,320.0 
Natural gas734.1 759.3 223.7 1,717.1 14.1 — (13.4)1,717.8 
Total regulated revenues2,054.1 759.3 223.7 3,037.1 14.1 — (13.4)3,037.8 
Other non-utility revenues— — 5.5 5.5 61.5 — (1.6)65.4 
Total revenues from contracts with customers2,054.1 759.3 229.2 3,042.6 75.6 — (15.0)3,103.2 
Other operating revenues5.8 29.0 (2.1)32.7 118.7 — (105.1)
(1)
46.3 
Total operating revenues$2,059.9 $788.3 $227.1 $3,075.3 $194.3 $— $(120.1)$3,149.5 

(in millions)WisconsinIllinoisOther StatesTotal Utility OperationsNon-Utility Energy InfrastructureCorporate and OtherReconciling EliminationsWEC Energy Group Consolidated
Three Months Ended March 31, 2024      
Electric$1,185.3 $— $— $1,185.3 $— $— $— $1,185.3 
Natural gas586.0 603.8 173.6 1,363.4 14.5 — (14.2)1,363.7 
Total regulated revenues1,771.3 603.8 173.6 2,548.7 14.5 — (14.2)2,549.0 
Other non-utility revenues— — 5.0 5.0 52.1 — (1.6)55.5 
Total revenues from contracts with customers1,771.3 603.8 178.6 2,553.7 66.6 — (15.8)2,604.5 
Other operating revenues7.5 62.2 6.0 75.7 104.3 — (104.3)
(1)
75.7 
Total operating revenues$1,778.8 $666.0 $184.6 $2,629.4 $170.9 $— $(120.1)$2,680.2 

(1)Amounts eliminated represent lease revenues related to certain plants that We Power leases to WE to supply electricity to its customers. Lease payments are billed from We Power to WE and then recovered in WE's rates as authorized by the PSCW and the FERC. WE operates the plants and is authorized by the PSCW and Wisconsin state law to fully recover prudently incurred operating and maintenance costs in electric rates.
Revenues from Contracts with Customers

Electric Utility Operating Revenues

The following table disaggregates electric utility operating revenues into customer class:
Three Months Ended March 31
(in millions)20252024
Residential$545.0 $483.2 
Small commercial and industrial421.1 391.7 
Large commercial and industrial238.3 217.6 
Other8.0 7.9 
Total retail revenues1,212.4 1,100.4 
Wholesale27.7 25.6 
Resale62.8 45.1 
Steam12.8 10.2 
Other utility revenues4.3 4.0 
Total electric utility operating revenues$1,320.0 $1,185.3 

Natural Gas Utility Operating Revenues

The following tables disaggregate natural gas utility operating revenues into customer class:
(in millions)WisconsinIllinoisOther StatesTotal Natural Gas Utility Operating Revenues
Three Months Ended March 31, 2025   
Residential$488.8 $465.6 $142.7 $1,097.1 
Commercial and industrial250.4 131.2 73.1 454.7 
Total retail revenues739.2 596.8 215.8 1,551.8 
Transportation33.2 97.4 13.5 144.1 
Other utility revenues (1)
(38.3)65.1 (5.6)21.2 
Total natural gas utility operating revenues$734.1 $759.3 $223.7 $1,717.1 

(in millions)WisconsinIllinoisOther StatesTotal Natural Gas Utility Operating Revenues
Three Months Ended March 31, 2024   
Residential$397.6 $375.0 $111.4 $884.0 
Commercial and industrial191.8 107.0 54.0 352.8 
Total retail revenues589.4 482.0 165.4 1,236.8 
Transportation29.8 90.1 11.6 131.5 
Other utility revenues (1)
(33.2)31.7 (3.4)(4.9)
Total natural gas utility operating revenues$586.0 $603.8 $173.6 $1,363.4 

(1)Includes the revenues subject to the purchased gas recovery mechanisms of our utilities, which fluctuate by segment based on actual natural gas costs incurred, compared with the recovery of natural gas costs that were anticipated in rates.

Other Natural Gas Operating Revenues

We have other natural gas operating revenues from Bluewater, which is in our non-utility energy infrastructure segment. Bluewater has entered into long-term service agreements for natural gas storage services with WE, WPS, and WG. All amounts associated with the service agreements with WE, WPS, and WG have been eliminated at the consolidated level.
Other Non-Utility Operating Revenues

Other non-utility operating revenues consist primarily of the following:
Three Months Ended March 31
(in millions)20252024
Renewable generation revenues$53.8 $44.5 
We Power revenues6.1 6.0 
Appliance service revenues5.5 5.0 
Total other non-utility operating revenues$65.4 $55.5 

Other Operating Revenues

Other operating revenues consist primarily of the following:
Three Months Ended March 31
(in millions)20252024
Alternative revenues (1)
$18.3 $60.5 
Late payment charges13.8 14.6 
Other14.2 0.6 
Total other operating revenues$46.3 $75.7 

(1)Alternative revenues consist of amounts to be recovered or refunded to customers subject to decoupling mechanisms, wholesale true-ups, and conservation improvement rider true-ups. For more information about our alternative revenues, see Note 1(d), Operating Revenues, in our 2024 Annual Report on Form 10-K.