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OPERATING REVENUES
 9 Months Ended
Sep. 30, 2020
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 2019 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 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 September 30, 2020      
Electric$1,212.9 $— $— $1,212.9 $— $— $— $1,212.9 
Natural gas150.5 213.4 43.1 407.0 9.1 — (8.3)407.8 
Total regulated revenues1,363.4 213.4 43.1 1,619.9 9.1 — (8.3)1,620.7 
Other non-utility revenues— 0.1 4.2 4.3 14.7 0.5 (1.6)17.9 
Total revenues from contracts with customers1,363.4 213.5 47.3 1,624.2 23.8 0.5 (9.9)1,638.6 
Other operating revenues2.9 8.4 1.0 12.3 99.7 0.1 (99.7)12.4 
Total operating revenues$1,366.3 $221.9 $48.3 $1,636.5 $123.5 $0.6 $(109.6)$1,651.0 

(in millions)WisconsinIllinoisOther StatesTotal Utility
Operations		Non-Utility Energy InfrastructureCorporate
and Other		Reconciling
Eliminations		WEC Energy Group Consolidated
Three Months Ended September 30, 2019      
Electric$1,185.4 $— $— $1,185.4 $— $— $— $1,185.4 
Natural gas151.1 190.0 43.8 384.9 8.9 — (8.4)385.4 
Total regulated revenues1,336.5 190.0 43.8 1,570.3 8.9 — (8.4)1,570.8 
Other non-utility revenues— — 4.2 4.2 12.0 1.3 (0.7)16.8 
Total revenues from contracts with customers1,336.5 190.0 48.0 1,574.5 20.9 1.3 (9.1)1,587.6 
Other operating revenues2.8 8.0 0.9 11.7 98.5 — (89.8)20.4 
Total operating revenues$1,339.3 $198.0 $48.9 $1,586.2 $119.4 $1.3 $(98.9)$1,608.0 

(in millions)WisconsinIllinoisOther StatesTotal Utility OperationsNon-Utility Energy InfrastructureCorporate and OtherReconciling EliminationsWEC Energy Group Consolidated
Nine Months Ended September 30, 2020
Electric$3,247.1 $— $— $3,247.1 $— $— $— $3,247.1 
Natural gas817.2 901.5 245.3 1,964.0 32.3 — (30.6)1,965.7 
Total regulated revenues4,064.3 901.5 245.3 5,211.1 32.3 — (30.6)5,212.8 
Other non-utility revenues— 0.1 12.8 12.9 48.2 1.7 (7.1)55.7 
Total revenues from contracts with customers4,064.3 901.6 258.1 5,224.0 80.5 1.7 (37.7)5,268.5 
Other operating revenues7.1 29.1 3.3 39.5 297.9 0.3 (297.9)39.8 
Total operating revenues$4,071.4 $930.7 $261.4 $5,263.5 $378.4 $2.0 $(335.6)$5,308.3 
(in millions)WisconsinIllinoisOther StatesTotal Utility OperationsNon-Utility Energy InfrastructureCorporate and OtherReconciling EliminationsWEC Energy Group Consolidated
Nine Months Ended September 30, 2019
Electric$3,269.1 $— $— $3,269.1 $— $— $— $3,269.1 
Natural gas943.3 967.4 293.0 2,203.7 35.1 — (32.2)2,206.6 
Total regulated revenues4,212.4 967.4 293.0 5,472.8 35.1 — (32.2)5,475.7 
Other non-utility revenues— 0.1 12.5 12.6 40.6 3.6 (4.5)52.3 
Total revenues from contracts with customers4,212.4 967.5 305.5 5,485.4 75.7 3.6 (36.7)5,528.0 
Other operating revenues13.6 9.9 (2.6)20.9 294.8 0.3 (268.4)47.6 
Total operating revenues$4,226.0 $977.4 $302.9 $5,506.3 $370.5 $3.9 $(305.1)$5,575.6 

Revenues from Contracts with Customers

Electric Utility Operating Revenues

The following table disaggregates electric utility operating revenues into customer class:
Electric Utility Operating Revenues
Three Months Ended September 30Nine Months Ended September 30
(in millions)2020201920202019
Residential$500.8 $454.7 $1,324.4 $1,218.1 
Small commercial and industrial373.6 385.6 1,004.3 1,050.8 
Large commercial and industrial244.0 237.9 626.4 668.0 
Other6.9 6.9 21.1 22.0 
Total retail revenues1,125.3 1,085.1 2,976.2 2,958.9 
Wholesale46.5 53.1 129.9 145.4 
Resale33.7 29.5 107.3 119.7 
Steam2.5 2.4 15.0 16.8 
Other utility revenues4.9 15.3 18.7 28.3 
Total electric utility operating revenues$1,212.9 $1,185.4 $3,247.1 $3,269.1 

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 September 30, 2020   
Residential$74.6 $128.6 $18.8 $222.0 
Commercial and industrial28.3 28.6 10.2 67.1 
Total retail revenues102.9 157.2 29.0 289.1 
Transport15.7 40.0 5.3 61.0 
Other utility revenues (1)
31.9 16.2 8.8 56.9 
Total natural gas utility operating revenues$150.5 $213.4 $43.1 $407.0 
(in millions)WisconsinIllinoisOther StatesTotal Natural Gas Utility Operating Revenues
Three Months Ended September 30, 2019   
Residential$69.3 $117.6 $22.5 $209.4 
Commercial and industrial30.0 29.3 11.5 70.8 
Total retail revenues99.3 146.9 34.0 280.2 
Transport14.4 44.3 5.6 64.3 
Other utility revenues (1)
37.4 (1.2)4.2 40.4 
Total natural gas utility operating revenues$151.1 $190.0 $43.8 $384.9 

(in millions)WisconsinIllinoisOther StatesTotal Natural Gas Utility Operating Revenues
Nine Months Ended September 30, 2020
Residential$513.5 $568.9 $154.1 $1,236.5 
Commercial and industrial226.6 156.5 78.5 461.6 
Total retail revenues740.1 725.4 232.6 1,698.1 
Transport56.8 159.0 22.8 238.6 
Other utility revenues (1)
20.3 17.1 (10.1)27.3 
Total natural gas utility operating revenues$817.2 $901.5 $245.3 $1,964.0 

(in millions)WisconsinIllinoisOther StatesTotal Natural Gas Utility Operating Revenues
Nine Months Ended September 30, 2019
Residential$579.4 $625.7 $187.0 $1,392.1 
Commercial and industrial285.5 190.6 104.0 580.1 
Total retail revenues864.9 816.3 291.0 1,972.2 
Transport52.5 178.3 23.0 253.8 
Other utility revenues (1)
25.9 (27.2)(21.0)(22.3)
Total natural gas utility operating revenues$943.3 $967.4 $293.0 $2,203.7 

(1)Includes amounts collected from (refunded to) customers for purchased gas adjustment costs.

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, and also provides limited service to unaffiliated customers. All amounts associated with services from affiliates 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 September 30Nine Months Ended September 30
(in millions)2020201920202019
Wind generation revenues$7.4 $4.9 $24.0 $17.0 
We Power revenues (1)
5.8 6.4 17.1 19.1 
Appliance service revenues4.2 4.2 12.8 12.5 
Distributed renewable solar project revenues0.3 1.3 1.4 3.6 
Other0.2 — 0.4 0.1 
Total other non-utility operating revenues$17.9 $16.8 $55.7 $52.3 
(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, and we continually amortize the deferred carrying costs to revenues over the related lease term that We Power has with WE. During the three and nine months ended September 30, 2020, we recorded $5.8 million and $17.1 million, respectively, of revenues related to these deferred carrying costs. During the three and nine months ended September 30, 2019, we recorded $6.4 million and $19.1 million, respectively, of revenues related to these deferred carrying costs. These contract liabilities are presented as deferred revenue, net on our balance sheets.

Other Operating Revenues

Other operating revenues consist primarily of the following:
Three Months Ended September 30Nine Months Ended September 30
(in millions)2020201920202019
Late payment charges (1)
$6.0 $9.7 $18.1 $34.9 
Alternative revenues (2)
5.4 1.4 18.2 (17.2)
Other1.0 9.3 3.5 29.9 
Total other operating revenues$12.4 $20.4 $39.8 $47.6 

(1)The reduction in late payment charges is a result of various regulatory orders from our utility commissions in response to the COVID-19 pandemic, which include the suspension of late payment charges during a designated time period. The amount of late payment charges recorded as alternative revenues during the three and nine months ended September 30, 2020 were $1.7 million and $8.5 million, respectively. See Note 24, Regulatory Environment, for more information.
(2)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, and conservation improvement rider true-ups, as discussed in Note 1(d), Operating Revenues, in our 2019 Annual Report on Form 10-K