XML 189 R29.htm IDEA: XBRL DOCUMENT v3.22.0.1
Segment Information
 12 Months Ended
Dec. 31, 2021
Segment Reporting [Abstract]  
SEGMENT INFORMATION SEGMENT INFORMATION
Ameren has four segments: Ameren Missouri, Ameren Illinois Electric Distribution, Ameren Illinois Natural Gas, and Ameren Transmission. The Ameren Missouri segment includes all of the operations of Ameren Missouri. Ameren Illinois Electric Distribution consists of the electric distribution business of Ameren Illinois. Ameren Illinois Natural Gas consists of the natural gas business of Ameren Illinois. Ameren Transmission primarily consists of the aggregated electric transmission businesses of Ameren Illinois and ATXI. The category called Other primarily includes Ameren (parent) activities and Ameren Services.
Ameren Missouri has one segment. Ameren Illinois has three segments: Ameren Illinois Electric Distribution, Ameren Illinois Natural Gas, and Ameren Illinois Transmission. See Note 1 – Summary of Significant Accounting Policies for additional information regarding the operations of Ameren Missouri, Ameren Illinois, and ATXI.
Segment operating revenues and a majority of operating expenses are directly recognized and incurred by Ameren Illinois to each Ameren Illinois segment. Common operating expenses, miscellaneous income and expenses, interest charges, and income tax expense are allocated by Ameren Illinois to each Ameren Illinois segment based on certain factors, which primarily relate to the nature of the cost. Additionally, Ameren Illinois Transmission earns revenue from transmission service provided to Ameren Illinois Electric Distribution, other retail electric suppliers, and wholesale customers. The transmission expense for Illinois customers who have elected to purchase their power from Ameren Illinois is recovered through a cost recovery mechanism with no net effect on Ameren Illinois Electric Distribution earnings, as costs are offset by corresponding revenues. Transmission revenues from these transactions are reflected in Ameren Transmission’s and Ameren Illinois Transmission’s operating revenues. An intersegment elimination at Ameren and Ameren Illinois occurs to eliminate these transmission revenues and expenses.
The following tables present information about the reported revenue and specified items reflected in net income attributable to common shareholders and capital expenditures by segment at Ameren and Ameren Illinois for the years ended December 31, 2021, 2020, and 2019. Ameren, Ameren Missouri, and Ameren Illinois management review segment capital expenditure information rather than any individual or total asset amount.
Ameren
Ameren MissouriAmeren Illinois Electric DistributionAmeren Illinois Natural GasAmeren TransmissionOtherIntersegment EliminationsAmeren
2021
External revenues$3,311 $1,635 $957 $491 $— $— $6,394 
Intersegment revenues42 4 — 71 — (117)— 
Depreciation and amortization632 309 90 111 4 — 1,146 
Interest income26 1 — — 3 (3)27 
Interest charges137 74 42 83 
(a)
50 (3)383 
Income taxes (benefit)3 53 39 82 (20)— 157 
Net income (loss) attributable to Ameren common shareholders518 165 108 230 (31)— 990 
Capital expenditures2,015 
(b)
579 278 616 4 (13)3,479 
(b)
2020
External revenues$3,069 $1,496 $760 $469 $— $— $5,794 
Intersegment revenues40 2 — 54 — (96)— 
Depreciation and amortization604 288 81 98 4 — 1,075 
Interest income26 2 — 1 4 (4)29 
Interest charges190 72 41 78 
(a)
42 (4)419 
Income taxes (benefit)34 42 36 78 (35)— 155 
Net income (loss) attributable to Ameren common shareholders436 143 99 216 (23)— 871 
Capital expenditures1,666 
(b)
543 301 716 5 2 3,233 
(b)
2019
External revenues$3,212 $1,487 $791 $401 $— $— $5,891 
Intersegment revenues31 17 6 63 — (98)19 
(c)
Depreciation and amortization556 273 78 84 4 — 995 
Interest income26 6 — 1 5 (5)33 
Interest charges178 71 38 74 
(a)
25 (5)381 
Income taxes (benefit)68 45 30 64 (25)— 182 
Net income (loss) attributable to Ameren common shareholders426 146 84 185 (13)— 828 
Capital expenditures1,076 518 318 528 3 (32)
(d)
2,411 
(a)Ameren Transmission interest charges include an allocation of financing costs from Ameren (parent).
(b)Includes $525 million and $564 million at Ameren and Ameren Missouri for wind generation expenditures for the year ended December 31, 2021 and 2020, respectively.
(c)Intersegment revenues at Ameren include $14 million and $5 million of revenue from Ameren Illinois Electric Distribution and Ameren Illinois Natural Gas, respectively, for the year ended December 31, 2019, for a software licensing agreement with Ameren Missouri. Under authoritative accounting guidance for rate-regulated entities, the revenue recognized by Ameren Illinois was not eliminated upon consolidation. See Note 13 – Related-party Transactions for additional information.
(d)Intersegment capital expenditure eliminations include $24 million of eliminations for the year ended December 31, 2019, for a software licensing agreement between Ameren Illinois and Ameren Missouri. See Note 13 – Related-party Transactions for additional information.
Ameren Illinois
Ameren Illinois Electric DistributionAmeren Illinois
Natural Gas		Ameren Illinois TransmissionIntersegment EliminationsAmeren Illinois
2021
External revenues$1,639 $957 $299 $— $2,895 
Intersegment revenues— — 66 (66)— 
Depreciation and amortization309 90 73 — 472 
Interest income1 — — — 1 
Interest charges74 42 48 — 164 
Income taxes53 39 51 — 143 
Net income available to common shareholder165 108 152 — 425 
Capital expenditures579 278 575 — 1,432 
2020
External revenues$1,498 $760 $277 $— $2,535 
Intersegment revenues— — 52 (52)— 
Depreciation and amortization288 81 65 — 434 
Interest income2 — 1 — 3 
Interest charges72 41 42 — 155 
Income taxes42 36 46 — 124 
Net income available to common shareholder143 99 137 — 379 
Capital expenditures543 301 603 — 1,447 
2019
External revenues$1,504 $797 $226 $— $2,527 
Intersegment revenues— — 62 (62)— 
Depreciation and amortization273 78 55 — 406 
Interest income6 — — — 6 
Interest charges71 38 38 — 147 
Income taxes45 30 35 — 110 
Net income available to common shareholder146 84 113 — 343 
Capital expenditures518 318 372 — 1,208 
The following tables present disaggregated revenues by segment at Ameren and Ameren Illinois for the years ended December 31, 2021, 2020, and 2019. 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
2021
Residential$1,445 $933 $— $— $— $2,378 
Commercial1,126 545 — — — 1,671 
Industrial280 135 — — — 415 
Other361 26 — 562 (116)833 
Total electric revenues$3,212 $1,639 $— $562 $(116)$5,297 
Residential$79 $— $657 $— $— $736 
Commercial34 — 172 — — 206 
Industrial4 — 35 — — 39 
Other24 — 93 — (1)116 
Total gas revenues$141 $— $957 $— $(1)$1,097 
Total revenues(a)
$3,353 $1,639 $957 $562 $(117)$6,394 
2020
Residential$1,373 $867 $— $— $— $2,240 
Commercial1,025 486 — — — 1,511 
Industrial261 124 — — — 385 
Other325 21 — 523 (94)775 
Total electric revenues$2,984 $1,498 $— $523 $(94)$4,911 
Residential$76 $— $541 $— $— $617 
Commercial29 — 136 — — 165 
Industrial4 — 14 — — 18 
Other16 — 69 — (2)83 
Total gas revenues$125 $— $760 $— $(2)$883 
Total revenues(a)
$3,109 $1,498 $760 $523 $(96)$5,794 
2019
Residential$1,403 $848 $— $— $— $2,251 
Commercial1,157 497 — — — 1,654 
Industrial278 127 — — — 405 
Other271 32 
(b)
— 464 (96)671 
Total electric revenues$3,109 $1,504 $— $464 $(96)$4,981 
Residential$81 $— $570 $— $— $651 
Commercial34 — 154 — — 188 
Industrial4 — 13 — — 17 
Other15 — 60 
(b)
— (2)73 
Total gas revenues$134 $— $797 $— $(2)$929 
Total revenues(a)
$3,243 $1,504 $797 $464 $(98)$5,910 
(a)The following table presents increases/(decreases) in revenues from alternative revenue programs and other revenues not from contracts with customers for the years ended December 31, 2021, 2020, and 2019:
Ameren MissouriAmeren Illinois Electric DistributionAmeren Illinois Natural GasAmeren TransmissionAmeren
2021
Revenues from alternative revenue programs$(16)$77 $5 $11 $77 
Other revenues not from contracts with customers56 
(a)
10 2 — 68 
(a)
2020
Revenues from alternative revenue programs$(14)$(20)$20 $50 $36 
Other revenues not from contracts with customers25 8 2 1 36 
2019
Revenues from alternative revenue programs$35 $(74)$— $(31)$(70)
Other revenues not from contracts with customers19 7 2 — 28 
(a)Includes insurance recoveries related to lost sales associated with the Callaway Energy Center maintenance outage. See Note 9 – Callaway Energy Center for additional information.
(b)Includes $14 million and $5 million for Ameren Illinois Electric Distribution and Ameren Illinois Natural Gas, respectively, for the year ended December 31, 2019, for a software licensing agreement with Ameren Missouri. See Note 13 – Related-party Transactions for additional information.
Ameren Illinois
Ameren Illinois Electric DistributionAmeren Illinois Natural GasAmeren Illinois TransmissionIntersegment EliminationsAmeren Illinois
2021
Residential$933 $657 $— $— $1,590 
Commercial545 172 — — 717 
Industrial135 35 — — 170 
Other26 93 365 (66)418 
Total revenues(a)
$1,639 $957 $365 $(66)$2,895 
2020
Residential$867 $541 $— $— $1,408 
Commercial486 136 — — 622 
Industrial124 14 — — 138 
Other21 69 329 (52)367 
Total revenues(a)
$1,498 $760 $329 $(52)$2,535 
2019
Residential$848 $570 $— $— $1,418 
Commercial497 154 — — 651 
Industrial127 13 — — 140 
Other32 
(b)
60 
(b)
288 (62)318 
Total revenues(a)
$1,504 $797 $288 $(62)$2,527 
(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 years ended December 31, 2021, 2020, and 2019:
Ameren Illinois Electric DistributionAmeren Illinois Natural GasAmeren Illinois TransmissionAmeren Illinois
2021
Revenues from alternative revenue programs$77 $5 $9 $91 
Other revenues not from contracts with customers10 2 — 12 
2020
Revenues from alternative revenue programs$(20)$20 $42 $42 
Other revenues not from contracts with customers8 2 — 10 
2019
Revenues from alternative revenue programs$(74)$— $(33)$(107)
Other revenues not from contracts with customers7 2 — 9 
(b)Includes $14 million and $5 million for Ameren Illinois Electric Distribution and Ameren Illinois Natural Gas, respectively, for the year ended December 31, 2019, for a software licensing agreement with Ameren Missouri. See Note 13 – Related-party Transactions for additional information.