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v3.23.1

Segment Information | 3 Months Ended
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Mar. 31, 2023
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 months ended March 31, 2023 and 2022. 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 Missouri |  | Ameren Illinois Electric Distribution |  | Ameren Illinois Natural Gas |  | Ameren Transmission |  | Other |  | Intersegment Eliminations |  | Ameren |
Three Months 2023: |  |  |  |  |  |  |  |  |  |  |  |  |  |
External revenues | $ | 913 |  |  | $ | 624 |  |  | $ | 391 |  |  | $ | 134 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,062 |  |
Intersegment revenues | 10 |  |  | — |  |  | — |  |  | 29 |  |  | — |  |  | (39) |  |  | — |  |
Net income attributable to Ameren common shareholders | 28 |  |  | 61 |  |  | 87 |  |  | 71 |  | (a) | 17 |  |  | — |  |  | 264 |  |
Capital expenditures | 481 |  |  | 170 |  |  | 51 |  |  | 213 |  |  | 3 |  |  | 13 |  |  | 931 |  |
Three Months 2022: |  |  |  |  |  |  |  |  |  |  |  |  |  |
External revenues | $ | 808 |  |  | $ | 464 |  |  | $ | 481 |  |  | $ | 126 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,879 |  |
Intersegment revenues | 10 |  |  | 1 |  |  | — |  |  | 20 |  |  | — |  |  | (31) |  |  | — |  |
Net income attributable to Ameren common shareholders | 50 |  |  | 49 |  |  | 80 |  |  | 58 |  | (a) | 15 |  |  | — |  |  | 252 |  |
Capital expenditures | 414 |  |  | 138 |  |  | 49 |  |  | 172 |  |  | 2 |  |  | (1) |  |  | 774 |  |
(a)Ameren Transmission earnings reflect an allocation of financing costs from Ameren (parent). Ameren Illinois
| Ameren Illinois Electric Distribution |  | Ameren Illinois Natural Gas |  | Ameren Illinois Transmission |  | Intersegment Eliminations |  | Ameren Illinois
Three Months 2023: |  |  |  |  |  |  |  |  |
External revenues | $ | 624 |  |  | $ | 391 |  |  | $ | 86 |  |  | $ | — |  |  | $ | 1,101 |
Intersegment revenues | — |  |  | — |  |  | 28 |  |  | (28) |  |  | — |
Net income available to common shareholder | 61 |  |  | 87 |  |  | 50 |  |  | — |  |  | 198 |
Capital expenditures | 170 |  |  | 51 |  |  | 186 |  |  | — |  |  | 407 |
Three Months 2022: |  |  |  |  |  |  |  |  |
External revenues | $ | 465 |  |  | $ | 481 |  |  | $ | 78 |  |  | $ | — |  |  | $ | 1,024 |
Intersegment revenues | — |  |  | — |  |  | 20 |  |  | (20) |  |  | — |
Net income available to common shareholder | 49 |  |  | 80 |  |  | 40 |  |  | — |  |  | 169 |
Capital expenditures | 138 |  |  | 49 |  |  | 155 |  |  | — |  |  | 342 |
The following tables present disaggregated revenues by segment at Ameren and Ameren Illinois for the three months ended March 31, 2023 and 2022. 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, off-system sales, and capacity revenues. Ameren
| Ameren Missouri |  | Ameren Illinois Electric Distribution |  | Ameren Illinois Natural Gas |  | Ameren Transmission |  |  |  | Intersegment Eliminations |  | Ameren |
Three Months 2023: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential | $ | 324 |  |  | $ | 382 |  |  | $ | — |  |  | $ | — |  |  |  |  | $ | — |  |  | $ | 706 |  |
Commercial | 247 |  |  | 200 |  |  | — |  |  | — |  |  |  |  | — |  |  | 447 |  |
Industrial | 61 |  |  | 48 |  |  | — |  |  | — |  |  |  |  | — |  |  | 109 |  |
Other | 209 |  |  | (6) |  |  | — |  |  | 163 |  |  |  |  | (38) |  |  | 328 |  |
Total electric revenues | $ | 841 |  |  | $ | 624 |  |  | $ | — |  |  | $ | 163 |  |  |  |  | $ | (38) |  |  | $ | 1,590 |  |
Residential | $ | 52 |  |  | $ | — |  |  | $ | 296 |  |  | $ | — |  |  |  |  | $ | — |  |  | $ | 348 |  |
Commercial | 23 |  |  | — |  |  | 77 |  |  | — |  |  |  |  | — |  |  | 100 |  |
Industrial | 2 |  |  | — |  |  | 7 |  |  | — |  |  |  |  | — |  |  | 9 |  |
Other | 5 |  |  | — |  |  | 11 |  |  | — |  |  |  |  | (1) |  |  | 15 |  |
Total natural gas revenues | $ | 82 |  |  | $ | — |  |  | $ | 391 |  |  | $ | — |  |  |  |  | $ | (1) |  |  | $ | 472 |  |
Total revenues(a) | $ | 923 |  |  | $ | 624 |  |  | $ | 391 |  |  | $ | 163 |  |  |  |  | $ | (39) |  |  | $ | 2,062 |  |
Three Months 2022: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential | $ | 332 |  |  | $ | 263 |  |  | $ | — |  |  | $ | — |  |  |  |  | $ | — |  |  | $ | 595 |  |
Commercial | 240 |  |  | 158 |  |  | — |  |  | — |  |  |  |  | — |  |  | 398 |  |
Industrial | 57 |  |  | 45 |  |  | — |  |  | — |  |  |  |  | — |  |  | 102 |  |
Other | 109 |  |  | (1) |  |  | — |  |  | 146 |  |  |  |  | (31) |  |  | 223 |  |
Total electric revenues | $ | 738 |  |  | $ | 465 |  |  | $ | — |  |  | $ | 146 |  |  |  |  | $ | (31) |  |  | $ | 1,318 |  |
Residential | $ | 51 |  |  | $ | — |  |  | $ | 369 |  |  | $ | — |  |  |  |  | $ | — |  |  | $ | 420 |  |
Commercial | 22 |  |  | — |  |  | 97 |  |  | — |  |  |  |  | — |  |  | 119 |  |
Industrial | 2 |  |  | — |  |  | 17 |  |  | — |  |  |  |  | — |  |  | 19 |  |
Other | 5 |  |  | — |  |  | (2) |  |  | — |  |  |  |  | — |  |  | 3 |  |
Total natural gas revenues | $ | 80 |  |  | $ | — |  |  | $ | 481 |  |  | $ | — |  |  |  |  | $ | — |  |  | $ | 561 |  |
Total revenues(a) | $ | 818 |  |  | $ | 465 |  |  | $ | 481 |  |  | $ | 146 |  |  |  |  | $ | (31) |  |  | $ | 1,879 |  |
(a)The following table presents increases/(decreases) in revenues from alternative revenue programs and other revenues not from contracts with customers for the three months ended March 31, 2023 and 2022:
| Ameren Missouri |  | Ameren Illinois Electric Distribution |  | Ameren Illinois Natural Gas |  | Ameren Transmission |  | Ameren |
Three Months 2023: |  |  |  |  |  |  |  |  |  |
Revenues from alternative revenue programs | $ | (2) |  |  | $ | 64 |  |  | $ | 28 |  |  | $ | 8 |  |  | $ | 98 |  |
Other revenues not from contracts with customers | (6) |  | (a) | 2 |  |  | 1 |  |  | — |  |  | (3) |  | (a)
Three Months 2022: |  |  |  |  |  |  |  |  |  |
Revenues from alternative revenue programs | $ | (6) |  |  | $ | 55 |  |  | $ | (5) |  |  | $ | 1 |  |  | $ | 45 |  |
Other revenues not from contracts with customers | — |  | (a) | 2 |  |  | 1 |  |  | — |  |  | 3 |  | (a)
(a)Includes net realized losses on derivative power contracts. Ameren Illinois
| Ameren Illinois Electric Distribution |  | Ameren Illinois Natural Gas |  | Ameren Illinois Transmission |  | Intersegment Eliminations |  | Ameren Illinois |
Three Months 2023: |  |  |  |  |  |  |  |  |  |
Residential | $ | 382 |  |  | $ | 296 |  |  | $ | — |  |  | $ | — |  |  | $ | 678 |  |
Commercial | 200 |  |  | 77 |  |  | — |  |  | — |  |  | 277 |  |
Industrial | 48 |  |  | 7 |  |  | — |  |  | — |  |  | 55 |  |
Other | (6) |  |  | 11 |  |  | 114 |  |  | (28) |  |  | 91 |  |
Total revenues(a) | $ | 624 |  |  | $ | 391 |  |  | $ | 114 |  |  | $ | (28) |  |  | $ | 1,101 |  |
Three Months 2022: |  |  |  |  |  |  |  |  |  |
Residential | $ | 263 |  |  | $ | 369 |  |  | $ | — |  |  | $ | — |  |  | $ | 632 |  |
Commercial | 158 |  |  | 97 |  |  | — |  |  | — |  |  | 255 |  |
Industrial | 45 |  |  | 17 |  |  | — |  |  | — |  |  | 62 |  |
Other | (1) |  |  | (2) |  |  | 98 |  |  | (20) |  |  | 75 |  |
Total revenues(a) | $ | 465 |  |  | $ | 481 |  |  | $ | 98 |  |  | $ | (20) |  |  | $ | 1,024 |  |
(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 months ended March 31, 2023 and 2022:
| Ameren Illinois Electric Distribution |  | Ameren Illinois Natural Gas |  | Ameren Illinois Transmission |  | Ameren Illinois
Three Months 2023: |  |  |  |  |  |  |
Revenues from alternative revenue programs | $ | 64 |  |  | $ | 28 |  |  | $ | 7 |  |  | $ | 99 |
Other revenues not from contracts with customers | 2 |  |  | 1 |  |  | — |  |  | 3 |
Three Months 2022: |  |  |  |  |  |  |
Revenues from alternative revenue programs | $ | 55 |  |  | $ | (5) |  |  | $ | 1 |  |  | $ | 51 |
Other revenues not from contracts with customers | 2 |  |  | 1 |  |  | — |  |  | 3 |

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8924-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8981-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9031-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8844-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8657-108599 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8721-108599 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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