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Segment Information
 6 Months Ended
Jun. 30, 2022
Segment Reporting [Abstract]  
SEGMENT INFORMATION SEGMENT INFORMATION
The following tables present revenues, net income attributable to common shareholders, and capital expenditures by segment at Ameren and Ameren Illinois for the three and six months ended June 30, 2022 and 2021. Ameren, Ameren Missouri, and Ameren Illinois management review segment capital expenditure information rather than any individual or total asset amount. For additional information about our segments, see Note 16 – Segment Information under Part II, Item 8, of the Form 10-K.
Ameren
Ameren MissouriAmeren Illinois Electric DistributionAmeren Illinois Natural GasAmeren TransmissionOtherIntersegment EliminationsAmeren
Three Months 2022:
External revenues$912 $504 $184 $126 $— $— $1,726 
Intersegment revenues7 — — 24 — (31)— 
Net income (loss) attributable to Ameren common shareholders100 51 6 63 
(a)
(13)— 207 
Capital expenditures392 143 69 160 1 (1)764 
Three Months 2021:
External revenues$799 $386 $168 $119 $— $— $1,472 
Intersegment revenues10 2 — 17 — (29)— 
Net income (loss) attributable to Ameren common shareholders111 41 8 55 
(a)
(8)— 207 
Capital expenditures567 
(b)
129 61 131 — (12)876 
(b)
Six Months 2022:
External revenues$1,720 $968 $665 $252 $— $— $3,605 
Intersegment revenues17 1 — 44 — (62)— 
Net income attributable to Ameren common shareholders150 100 86 121 
(a)
2 — 459 
Capital expenditures806 281 118 332 3 (2)1,538 
Six Months 2021:
External revenues$1,494 $797 $515 $232 $— $— $3,038 
Intersegment revenues19 2 — 34 — (55)— 
Net income attributable to Ameren common shareholders158 87 83 102 
(a)
10 — 440 
Capital expenditures1,101 
(b)
286 109 272 1 (6)1,763 
(b)
(a)Ameren Transmission earnings reflect an allocation of financing costs from Ameren (parent).
(b)Includes $224 million and $417 million at Ameren and Ameren Missouri for wind generation expenditures for the three and six months ended June 30, 2021, respectively.
Ameren Illinois
Ameren Illinois Electric DistributionAmeren Illinois Natural GasAmeren Illinois TransmissionIntersegment EliminationsAmeren Illinois
Three Months 2022:
External revenues$504 $184 $81 $— $769 
Intersegment revenues— — 24 (24)— 
Net income available to common shareholder51 6 46 — 103 
Capital expenditures143 69 145 — 357 
Three Months 2021:
External revenues$388 $168 $73 $— $629 
Intersegment revenues— — 15 (15)— 
Net income available to common shareholder41 8 37 — 86 
Capital expenditures129 61 119 — 309 
Ameren Illinois Electric DistributionAmeren Illinois Natural GasAmeren Illinois TransmissionIntersegment EliminationsAmeren Illinois
Six Months 2022:
External revenues$969 $665 $159 $— $1,793 
Intersegment revenues— — 44 (44)— 
Net income available to common shareholder100 86 86 — 272 
Capital expenditures281 118 300 — 699 
Six Months 2021:
External revenues$799 $515 $138 $— $1,452 
Intersegment revenues— — 31 (31)— 
Net income available to common shareholder87 83 65 — 235 
Capital expenditures286 109 251 — 646 
The following tables present disaggregated revenues by segment at Ameren and Ameren Illinois for the three and six months ended June 30, 2022 and 2021. Economic factors affect the nature, timing, amount, and uncertainty of revenues and cash flows in a similar manner across customer classes. Revenues from alternative revenue programs have a similar distribution among customer classes as revenues from contracts with customers. Other revenues not associated with contracts with customers are presented in the Other customer classification, along with electric transmission and off-system revenues.
Ameren
Ameren MissouriAmeren Illinois Electric DistributionAmeren Illinois Natural GasAmeren TransmissionIntersegment EliminationsAmeren
Three Months 2022:
Residential$371 $284 $— $— $— $655 
Commercial298 180 — — — 478 
Industrial73 53 — — — 126 
Other148 (13)

— 150 (31)254 
Total electric revenues$890 $504 $— $150 $(31)$1,513 
Residential$16 $— $117 $— $— $133 
Commercial8 — 30 — — 38 
Industrial1 — 11 — — 12 
Other4 — 26 

— — 30 
Total natural gas revenues$29 $— $184 $— $— $213 
Total revenues(a)
$919 $504 $184 $150 $(31)$1,726 
Three Months 2021:
Residential$328 $218 $— $— $— $546 
Commercial271 127 — — — 398 
Industrial71 34 — — — 105 
Other119 

9 — 136 (29)235 

Total electric revenues$789 $388 $— $136 $(29)$1,284 
Residential$11 $— $112 $— $— $123 
Commercial4 — 29 — — 33 
Industrial1 — 3 — — 4 
Other4 — 24 — — 28 
Total natural gas revenues$20 $— $168 $— $— $188 
Total revenues(a)
$809 $388 $168 $136 $(29)$1,472 
Ameren MissouriAmeren Illinois Electric DistributionAmeren Illinois Natural GasAmeren TransmissionIntersegment EliminationsAmeren
Six Months 2022:
Residential$703 $547 $— $— $— $1,250 
Commercial538 338 — — — 876 
Industrial130 98 — — — 228 
Other257 (14)— 296 (62)477 
Total electric revenues$1,628 $969 $— $296 $(62)$2,831 
Residential$67 $— $486 $— $— $553 
Commercial30 — 127 — — 157 
Industrial3 — 28 — — 31 
Other9 — 24 — — 33 
Total natural gas revenues$109 $— $665 $— $— $774 
Total revenues(a)
$1,737 $969 $665 $296 $(62)$3,605 
Six Months 2021:
Residential$640 $447 $— $— $— $1,087 
Commercial487 259 — — — 746 
Industrial123 68 — — — 191 
Other180 25 — 266 (55)416 
Total electric revenues$1,430 $799 $— $266 $(55)$2,440 
Residential$45 $— $363 $— $— $408 
Commercial19 — 93 — — 112 
Industrial2 — 17 — — 19 
Other17 — 42 — — 59 
Total natural gas revenues$83 $— $515 $— $— $598 
Total revenues(a)
$1,513 $799 $515 $266 $(55)$3,038 
(a)The following table presents increases/(decreases) in revenues from alternative revenue programs and other revenues not from contracts with customers for the three and six months ended June 30, 2022 and 2021:
Ameren MissouriAmeren Illinois Electric DistributionAmeren Illinois Natural GasAmeren TransmissionAmeren
Three Months 2022:
Revenues from alternative revenue programs$— $41 $3 $(4)$40 
Other revenues not from contracts with customers(36)1 1 — (34)
Three Months 2021:
Revenues from alternative revenue programs$(5)$34 $2 $5 $36 
Other revenues not from contracts with customers66 
(a)
— 1 — 67 
(a)
Six Months 2022:
Revenues from alternative revenue programs$(6)$96 $(2)$(3)$85 
Other revenues not from contracts with customers(36)
(a)
3 2 — (31)
(a)
Six Months 2021:
Revenues from alternative revenue programs$(15)$95 $5 $4 $89 
Other revenues not from contracts with customers64 
(a)
3 2 — 69 
(a)
(a)Includes insurance recoveries related to lost sales associated with the Callaway Energy Center maintenance outage. See Note 9 – Callaway Energy Center under Part II, Item 8, of the Form 10-K for additional information.
Ameren Illinois
Ameren Illinois Electric DistributionAmeren Illinois Natural GasAmeren Illinois TransmissionIntersegment EliminationsAmeren Illinois
Three Months 2022:
Residential$284 $117 $— $— $401 
Commercial180 30 — — 210 
Industrial53 11 — — 64 
Other(13)

26 

105 (24)94 
Total revenues(a)
$504 $184 $105 $(24)$769 
Three Months 2021:
Residential$218 $112 $— $— $330 
Commercial127 29 — — 156 
Industrial34 3 — — 37 
Other9 24 88 (15)106 
Total revenues(a)
$388 $168 $88 $(15)$629 
Six Months 2022:
Residential$547 $486 $— $— $1,033 
Commercial338 127 — — 465 
Industrial98 28 — — 126 
Other(14)24 203 (44)169 
Total revenues(a)
$969 $665 $203 $(44)$1,793 
Six Months 2021:
Residential$447 $363 $— $— $810 
Commercial259 93 — — 352 
Industrial68 17 — — 85 
Other25 42 169 (31)205 
Total revenues(a)
$799 $515 $169 $(31)$1,452 
(a)The following table presents increases/(decreases) in revenues from alternative revenue programs and other revenues not from contracts with customers for the Ameren Illinois segments for the three and six months ended June 30, 2022 and 2021:
Ameren Illinois Electric DistributionAmeren Illinois Natural GasAmeren Illinois TransmissionAmeren Illinois
Three Months 2022:
Revenues from alternative revenue programs$41 $3 $(3)$41 
Other revenues not from contracts with customers1 1 — 2 
Three Months 2021:
Revenues from alternative revenue programs$34 $2 $2 $38 
Other revenues not from contracts with customers— 1 — 1 
Six Months 2022:
Revenues from alternative revenue programs$96 $(2)$(2)$92 
Other revenues not from contracts with customers3 2 — 5 
Six Months 2021:
Revenues from alternative revenue programs$95 $5 $1 $101 
Other revenues not from contracts with customers3 2 — 5