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OPERATING REVENUES (Tables)
 3 Months Ended
Mar. 31, 2022
Disaggregation of Operating Revenues  
Operating revenues disaggregated by revenue source
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 have different expectations of service, energy and demand requirements, and can be impacted differently by regulatory activities within their jurisdictions.
(in millions)WisconsinIllinoisOther StatesTotal Utility
Operations		Non-Utility Energy InfrastructureCorporate
and Other		Reconciling
Eliminations		WEC Energy Group Consolidated
Three Months Ended March 31, 2022      
Electric$1,187.5 $— $— $1,187.5 $— $— $— $1,187.5 
Natural gas746.8 679.9 238.2 1,664.9 15.3 — (14.8)1,665.4 
Total regulated revenues1,934.3 679.9 238.2 2,852.4 15.3 — (14.8)2,852.9 
Other non-utility revenues— — 4.6 4.6 43.7 — (1.6)46.7 
Total revenues from contracts with customers1,934.3 679.9 242.8 2,857.0 59.0 — (16.4)2,899.6 
Other operating revenues8.0 2.2 (1.9)8.3 100.5 0.2 (100.5)
(1)
8.5 
Total operating revenues$1,942.3 $682.1 $240.9 $2,865.3 $159.5 $0.2 $(116.9)$2,908.1 
(in millions)WisconsinIllinoisOther StatesTotal Utility
Operations		Non-Utility Energy InfrastructureCorporate
and Other		Reconciling
Eliminations		WEC Energy Group Consolidated
Three Months Ended March 31, 2021      
Electric$1,095.0 $— $— $1,095.0 $— $— $— $1,095.0 
Natural gas627.3 693.5 225.6 1,546.4 14.6 — (13.3)1,547.7 
Total regulated revenues1,722.3 693.5 225.6 2,641.4 14.6 — (13.3)2,642.7 
Other non-utility revenues— — 4.7 4.7 23.2 — (1.6)26.3 
Total revenues from contracts with customers1,722.3 693.5 230.3 2,646.1 37.8 — (14.9)2,669.0 
Other operating revenues9.4 9.9 3.0 22.3 99.8 0.1 (99.8)
(1)
22.4 
Total operating revenues$1,731.7 $703.4 $233.3 $2,668.4 $137.6 $0.1 $(114.7)$2,691.4 

(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  
Disaggregation of Operating Revenues  
Operating revenues disaggregated by revenue source
The following table disaggregates electric utility operating revenues into customer class:
Three Months Ended March 31
(in millions)20222021
Residential$463.1 $423.7 
Small commercial and industrial370.1 331.4 
Large commercial and industrial229.2 209.5 
Other7.8 7.8 
Total retail revenues1,070.2 972.4 
Wholesale42.4 39.7 
Resale56.8 62.7 
Steam12.1 14.8 
Other utility revenues6.0 5.4 
Total electric utility operating revenues$1,187.5 $1,095.0 
Revenues from contracts with customers | Natural gas  
Disaggregation of Operating Revenues  
Operating revenues disaggregated by revenue source
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, 2022   
Residential$502.5 $465.5 $161.3 $1,129.3 
Commercial and industrial272.5 158.3 86.8 517.6 
Total retail revenues775.0 623.8 248.1 1,646.9 
Transportation25.5 80.9 13.9 120.3 
Other utility revenues (1)
(53.7)(24.8)(23.8)(102.3)
Total natural gas utility operating revenues$746.8 $679.9 $238.2 $1,664.9 
(in millions)WisconsinIllinoisOther StatesTotal Natural Gas Utility Operating Revenues
Three Months Ended March 31, 2021   
Residential$347.6 $333.9 $87.9 $769.4 
Commercial and industrial176.4 102.7 43.9 323.0 
Total retail revenues524.0 436.6 131.8 1,092.4 
Transportation24.4 74.2 11.0 109.6 
Other utility revenues (1)
78.9 182.7 82.8 344.4 
Total natural gas utility operating revenues$627.3 $693.5 $225.6 $1,546.4 

(1)Includes the revenues subject to the purchased gas recovery mechanisms of our utilities. The amounts for the three months ended March 31, 2021 reflect the higher natural gas costs that were incurred as a result of the extreme winter weather conditions in February 2021. As these amounts are billed to customers, they are reflected in retail revenues with an offsetting decrease in other utility revenues. In 2022, we continued to recover on natural gas costs we under-collected from our customers in 2021, related to the extreme weather. In addition, during the first quarter of 2022 we over-collected natural gas costs due to these costs being lower than what was anticipated in rates. See Note 21, Regulatory Environment, for more information.
Revenues from contracts with customers | Other non-utility revenues  
Disaggregation of Operating Revenues  
Operating revenues disaggregated by revenue source
Other non-utility operating revenues consist primarily of the following:
Three Months Ended March 31
(in millions)20222021
Wind generation revenues$36.2 $15.8 
We Power revenues (1)
5.9 5.8 
Appliance service revenues4.6 4.7 
Total other non-utility operating revenues$46.7 $26.3 

(1)As part of the construction of the We Power electric generating units, we capitalized interest during construction, which is included in property, plant, and equipment. As allowed by the PSCW, we collected these carrying costs from WE's utility customers during construction. The equity portion of these carrying costs was recorded as a contract liability, which is presented as deferred revenue, net on our balance sheets. We continually amortize the deferred carrying costs to revenues over the related lease term that We Power has with WE.
Other operating revenues  
Disaggregation of Operating Revenues  
Operating revenues disaggregated by revenue source
Other operating revenues consist primarily of the following:
Three Months Ended March 31
(in millions)20222021
Late payment charges$13.6 $15.0 
Alternative revenues (1)
(6.0)6.2 
Other0.9 1.2 
Total other operating revenues$8.5 $22.4 

(1)Negative amounts can result from alternative revenues being reversed to revenues from contracts with customers as the customer is billed for these alternative revenues. Negative amounts can also result from revenues to be refunded to customers subject to decoupling mechanisms, wholesale true-ups, conservation improvement rider true-ups, and certain late payment charges.