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Operating Revenues | 12 Months Ended
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Dec. 31, 2020
Revenue from Contract with Customer [Abstract] |
OPERATING REVENUES | OPERATING REVENUES For more information about our significant accounting policies related to operating revenues, see Note 1(d), Operating Revenues. 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) |  | Wisconsin |  | Illinois |  | Other States |  | Total Utility Operations |  | Non-Utility Energy Infrastructure |  | Corporate and Other |  | Reconciling Eliminations |  | WEC Energy Group Consolidated
Year ended December 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Electric |  | $ | 4,266.1 |  |  | $ | — |  |  | $ | — |  |  | $ | 4,266.1 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 4,266.1 |
Natural gas |  | 1,195.6 |  |  | 1,267.9 |  |  | 361.0 |  |  | 2,824.5 |  |  | 44.4 |  |  | — |  |  | (42.0) |  |  | 2,826.9 |
Total regulated revenues |  | 5,461.7 |  |  | 1,267.9 |  |  | 361.0 |  |  | 7,090.6 |  |  | 44.4 |  |  | — |  |  | (42.0) |  |  | 7,093.0 |
Other non-utility revenues |  | — |  |  | — |  |  | 17.1 |  |  | 17.1 |  |  | 66.6 |  |  | 1.7 |  |  | (9.1) |  |  | 76.3 |
Total revenues from contracts with customers |  | 5,461.7 |  |  | 1,267.9 |  |  | 378.1 |  |  | 7,107.7 |  |  | 111.0 |  |  | 1.7 |  |  | (51.1) |  |  | 7,169.3 |
Other operating revenues |  | 11.8 |  |  | 54.0 |  |  | 6.0 |  |  | 71.8 |  |  | 397.5 |  |  | 0.5 |  |  | (397.4) |  |  | 72.4 |
Total operating revenues |  | $ | 5,473.5 |  |  | $ | 1,321.9 |  |  | $ | 384.1 |  |  | $ | 7,179.5 |  |  | $ | 508.5 |  |  | $ | 2.2 |  |  | $ | (448.5) |  |  | $ | 7,241.7 |
(in millions) |  | Wisconsin |  | Illinois |  | Other States |  | Total Utility Operations |  | Non-Utility Energy Infrastructure |  | Corporate and Other |  | Reconciling Eliminations |  | WEC Energy Group Consolidated
Year ended December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Electric |  | $ | 4,307.7 |  |  | $ | — |  |  | $ | — |  |  | $ | 4,307.7 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 4,307.7 |
Natural gas |  | 1,324.1 |  |  | 1,332.4 |  |  | 411.6 |  |  | 3,068.1 |  |  | 47.4 |  |  | — |  |  | (44.1) |  |  | 3,071.4 |
Total regulated revenues |  | 5,631.8 |  |  | 1,332.4 |  |  | 411.6 |  |  | 7,375.8 |  |  | 47.4 |  |  | — |  |  | (44.1) |  |  | 7,379.1 |
Other non-utility revenues |  | — |  |  | 0.1 |  |  | 16.6 |  |  | 16.7 |  |  | 55.2 |  |  | 4.0 |  |  | (5.7) |  |  | 70.2 |
Total revenues from contracts with customers |  | 5,631.8 |  |  | 1,332.5 |  |  | 428.2 |  |  | 7,392.5 |  |  | 102.6 |  |  | 4.0 |  |  | (49.8) |  |  | 7,449.3 |
Other operating revenues |  | 15.3 |  |  | 24.6 |  |  | (2.2) |  |  | 37.7 |  |  | 393.3 |  |  | 0.4 |  |  | (357.6) |  |  | 73.8 |
Total operating revenues |  | $ | 5,647.1 |  |  | $ | 1,357.1 |  |  | $ | 426.0 |  |  | $ | 7,430.2 |  |  | $ | 495.9 |  |  | $ | 4.4 |  |  | $ | (407.4) |  |  | $ | 7,523.1 |
(in millions) |  | Wisconsin |  | Illinois |  | Other States |  | Total Utility Operations |  | Non-Utility Energy Infrastructure |  | Corporate and Other |  | Reconciling Eliminations |  | WEC Energy Group Consolidated
Year ended December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Electric |  | $ | 4,432.4 |  |  | $ | — |  |  | $ | — |  |  | $ | 4,432.4 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 4,432.4 |
Natural gas |  | 1,350.6 |  |  | 1,406.9 |  |  | 428.4 |  |  | 3,185.9 |  |  | 45.4 |  |  | — |  |  | (36.4) |  |  | 3,194.9 |
Total regulated revenues |  | 5,783.0 |  |  | 1,406.9 |  |  | 428.4 |  |  | 7,618.3 |  |  | 45.4 |  |  | — |  |  | (36.4) |  |  | 7,627.3 |
Other non-utility revenues |  | — |  |  | 0.2 |  |  | 16.1 |  |  | 16.3 |  |  | 34.6 |  |  | 7.9 |  |  | (5.8) |  |  | 53.0 |
Total revenues from contracts with customers |  | 5,783.0 |  |  | 1,407.1 |  |  | 444.5 |  |  | 7,634.6 |  |  | 80.0 |  |  | 7.9 |  |  | (42.2) |  |  | 7,680.3 |
Other operating revenues |  | 11.7 |  |  | (7.1) |  |  | (6.3) |  |  | (1.7) |  |  | 388.4 |  |  | 0.8 |  |  | (388.3) |  |  | (0.8) |
Total operating revenues |  | $ | 5,794.7 |  |  | $ | 1,400.0 |  |  | $ | 438.2 |  |  | $ | 7,632.9 |  |  | $ | 468.4 |  |  | $ | 8.7 |  |  | $ | (430.5) |  |  | $ | 7,679.5 |
Revenues from Contracts with Customers Electric Utility Operating Revenues The following table disaggregates electric utility operating revenues into customer class:
|  | Electric Utility Operating Revenues
|  | Year Ended December 31
(in millions) |  | 2020 |  | 2019 |  | 2018
Residential |  | $ | 1,743.9 |  |  | $ | 1,608.6 |  |  | $ | 1,636.3 |
Small commercial and industrial |  | 1,325.9 |  |  | 1,384.6 |  |  | 1,408.6 |
Large commercial and industrial |  | 821.5 |  |  | 871.9 |  |  | 912.2 |
Other |  | 29.0 |  |  | 29.6 |  |  | 29.9 |
Total retail revenues |  | 3,920.3 |  |  | 3,894.7 |  |  | 3,987.0 |
Wholesale |  | 174.0 |  |  | 189.5 |  |  | 210.1 |
Resale |  | 130.4 |  |  | 163.1 |  |  | 192.2 |
Steam |  | 21.3 |  |  | 23.3 |  |  | 24.1 |
Other utility revenues |  | 20.1 |  |  | 37.1 |  |  | 19.0 |
Total electric utility operating revenues |  | $ | 4,266.1 |  |  | $ | 4,307.7 |  |  | $ | 4,432.4 |
Natural Gas Utility Operating Revenues The following tables disaggregate natural gas utility operating revenues into customer class:
(in millions) |  | Wisconsin |  | Illinois |  | Other States |  | Total Natural Gas Utility Operating Revenues
Year ended December 31, 2020 |  |  |  |  |  |  |  |
Residential |  | $ | 752.6 |  |  | $ | 802.2 |  |  | $ | 220.8 |  |  | $ | 1,775.6 |
Commercial and industrial |  | 338.1 |  |  | 221.0 |  |  | 115.8 |  |  | 674.9 |
Total retail revenues |  | 1,090.7 |  |  | 1,023.2 |  |  | 336.6 |  |  | 2,450.5 |
Transport |  | 79.1 |  |  | 215.6 |  |  | 31.5 |  |  | 326.2 |
Other utility revenues (1) |  | 25.8 |  |  | 29.1 |  |  | (7.1) |  |  | 47.8 |
Total natural gas utility operating revenues |  | $ | 1,195.6 |  |  | $ | 1,267.9 |  |  | $ | 361.0 |  |  | $ | 2,824.5 |
(in millions) |  | Wisconsin |  | Illinois |  | Other States |  | Total Natural Gas Utility Operating Revenues
Year ended December 31, 2019 |  |  |  |  |  |  |  |
Residential |  | $ | 837.9 |  |  | $ | 857.8 |  |  | $ | 258.2 |  |  | $ | 1,953.9 |
Commercial and industrial |  | 419.9 |  |  | 261.7 |  |  | 148.7 |  |  | 830.3 |
Total retail revenues |  | 1,257.8 |  |  | 1,119.5 |  |  | 406.9 |  |  | 2,784.2 |
Transport |  | 72.6 |  |  | 245.3 |  |  | 31.6 |  |  | 349.5 |
Other utility revenues (1) |  | (6.3) |  |  | (32.4) |  |  | (26.9) |  |  | (65.6) |
Total natural gas utility operating revenues |  | $ | 1,324.1 |  |  | $ | 1,332.4 |  |  | $ | 411.6 |  |  | $ | 3,068.1 |
(in millions) |  | Wisconsin |  | Illinois |  | Other States |  | Total Natural Gas Utility Operating Revenues
Year ended December 31, 2018 |  |  |  |  |  |  |  |
Residential |  | $ | 834.5 |  |  | $ | 877.5 |  |  | $ | 263.3 |  |  | $ | 1,975.3 |
Commercial and industrial |  | 436.7 |  |  | 266.9 |  |  | 140.0 |  |  | 843.6 |
Total retail revenues |  | 1,271.2 |  |  | 1,144.4 |  |  | 403.3 |  |  | 2,818.9 |
Transport |  | 70.8 |  |  | 244.1 |  |  | 31.8 |  |  | 346.7 |
Other utility revenues (1) |  | 8.6 |  |  | 18.4 |  |  | (6.7) |  |  | 20.3 |
Total natural gas utility operating revenues |  | $ | 1,350.6 |  |  | $ | 1,406.9 |  |  | $ | 428.4 |  |  | $ | 3,185.9 |
(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:
|  | Year Ended December 31
(in millions) |  | 2020 |  | 2019 |  | 2018
Wind generation revenues |  | $ | 34.6 |  |  | $ | 24.0 |  |  | $ | 3.6 |
We Power revenues |  | 22.9 |  |  | 25.4 |  |  | 25.3 |
Appliance service revenues |  | 17.1 |  |  | 16.6 |  |  | 15.9 |
Distributed renewable solar project revenues |  | 1.4 |  |  | 4.0 |  |  | 8.0 |
Other |  | 0.3 |  |  | 0.2 |  |  | 0.2 |
Total other non-utility operating revenues |  | $ | 76.3 |  |  | $ | 70.2 |  |  | $ | 53.0 |
Other Operating Revenues Other operating revenues consist primarily of the following:
|  | Year Ended December 31
(in millions) |  | 2020 |  | 2019 |  | 2018
Alternative revenues (1) |  | $ | 38.8 |  |  | $ | (9.6) |  |  | $ | (45.6) |
Late payment charges (2) |  | 29.4 |  |  | 43.7 |  |  | 40.3 |
Other |  | 4.2 |  |  | 39.7 |  |  | 4.5 |
Total other operating revenues |  | $ | 72.4 |  |  | $ | 73.8 |  |  | $ | (0.8) |
(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, as discussed in Note 1(d), Operating Revenues. (2) 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. PGL and NSG were authorized to implement a SPC rider for the recovery of these late payment charges related to COVID-19, thereby allowing them to record these late payment charges as alternative revenues. The total amount of late payment charges recorded as alternative revenues during the year ended December 31, 2020 was $8.5 million. See Note 26, Regulatory Environment, for more information.

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -URI http://asc.fasb.org/topic&trid=49130388 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130550-203045 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130558-203045 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 + Details
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