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Operating Revenues
 12 Months Ended
Dec. 31, 2019
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 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 are impacted by regulatory activities within their jurisdictions.

Comparable amounts have not been presented for the year ended December 31, 2017, due to our adoption of ASU 2014-09, Revenues from Contracts with Customers, under the modified retrospective method.
(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)
 
2019
 
2018
Residential
 
$
1,608.6

 
$
1,636.3

Small commercial and industrial
 
1,384.6

 
1,408.6

Large commercial and industrial
 
871.9

 
912.2

Other
 
29.6

 
29.9

Total retail revenues
 
3,894.7

 
3,987.0

Wholesale
 
189.5

 
210.1

Resale
 
163.1

 
192.2

Steam
 
23.3

 
24.1

Other utility revenues
 
37.1

 
19.0

Total electric utility operating revenues
 
$
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, 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 *
 
(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 *
 
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



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

Other Non-Utility Operating Revenues

Other non-utility operating revenues consist primarily of the following:
 
 
Year Ended December 31
(in millions)
 
2019
 
2018
We Power revenues
 
$
25.4

 
$
25.3

Wind generation revenues
 
24.0

 
3.6

Appliance service revenues
 
16.6

 
15.9

Distributed renewable solar project revenues
 
4.0

 
8.0

Other
 
0.2

 
0.2

Total other non-utility operating revenues
 
$
70.2

 
$
53.0



Other Operating Revenues

Other operating revenues consist primarily of the following:
 
 
Year Ended December 31
(in millions)
 
2019
 
2018
Late payment charges
 
$
43.7

 
$
40.3

Alternative revenues *
 
(9.6
)
 
(45.6
)
Other
 
39.7

 
4.5

Total other operating revenues
 
$
73.8

 
$
(0.8
)

*
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 and wholesale true-ups, as discussed in Note 1(d), Operating Revenues.