v3.25.2
Segment Information (Tables)
 6 Months Ended
Jun. 30, 2025
Segment Reporting [Abstract]  
Schedule Of Segment Reporting Information By Segment
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, 2025 and 2024. 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 2025:
External revenues$1,332 $570 $158 $161 $— $— $2,221 
Intersegment revenues8 3 — 47 — (58)— 
Revenue1,340 573 158 208 — (58)2,221 
Fuel and purchased power(a)
(614)(223)— — — 43 (794)
Natural gas purchased for resale(a)
(9)— (30)— — — (39)
Other operations and maintenance expenses(a)
(238)(156)(55)(18)(8)15 (460)
Other segment items
Depreciation and amortization(209)(93)(33)(49)(2)— (386)
Taxes other than income taxes(89)(20)(16)(3)(3)— (131)
Other income, net47 23 5 10 12 (1)96 
Interest charges(70)(26)(16)(29)(47)1 (187)
Income taxes (benefit)(7)(13)(3)(33)13 — (43)
Noncontrolling interests – preferred stock dividends(1)(1)— — — — (2)
Net income (loss) attributable to Ameren common shareholders150 64 10 86 
(b)
(35)— 275 
Interest income2 8 — — 1 (1)10 
Capital expenditures667 153 88 158 3 (3)1,066 
Three Months 2024:
External revenues$879 $509 $148 $157 $— $— $1,693 
Intersegment revenues9 — — 34 — (43)— 
Revenue888 509 148 191 — (43)1,693 
Fuel and purchased power(a)
(189)(168)— — — 30 (327)
Natural gas purchased for resale(a)
(9)— (24)— — — (33)
Other operations and maintenance expenses(a)
(247)(153)(59)(16)(3)13 (465)
Other segment items
Depreciation and amortization(208)(93)(33)(40)(2)— (376)
Taxes other than income taxes(91)(19)(15)(2)(4)— (131)
Other income, net49 27 7 4 18 (2)103 
Interest charges(63)(26)(15)(29)(34)2 (165)
Income taxes (benefit)(1)(15)(3)(29)9 — (39)
Noncontrolling interests – preferred stock dividends(1)(1)— — — — (2)
Net income (loss) attributable to Ameren common shareholders128 61 6 79 
(b)
(16)— 258 
Interest income3 9 — 1 2 (2)13 
Capital expenditures638 132 59 175 2 (4)1,002 
Ameren MissouriAmeren Illinois Electric DistributionAmeren Illinois Natural GasAmeren TransmissionOtherIntersegment EliminationsAmeren
Six Months 2025:
External revenues$2,282 $1,140 $569 $327 $— $— $4,318 
Intersegment revenues15 5 — 91 — (111)— 
Revenue2,297 1,145 569 418 — (111)4,318 
Fuel and purchased power(a)
(944)(435)— — — 83 (1,296)
Natural gas purchased for resale(a)
(39)— (169)— — — (208)
Other operations and maintenance expenses(a)
(488)(322)(110)(37)(16)28 (945)
Other segment items
Depreciation and amortization(403)(184)(65)(97)(4)— (753)
Taxes other than income taxes(178)(41)(45)(4)(7)— (275)
Other income, net90 46 10 17 20 (2)181 
Interest charges(130)(52)(31)(58)(93)2 (362)
Income (taxes) benefit(11)(29)(41)(64)52 — (93)
Noncontrolling interests – preferred stock dividends(2)(1)— — — — (3)
Net income (loss) attributable to Ameren common shareholders192 127 118 175 
(b)
(48)— 564 
Interest income4 16 — 1 2 (2)21 
Capital expenditures1,325 320 147 331 5 2 2,130 
Six Months 2024:
External revenues$1,647 $1,015 $539 $308 $— $— $3,509 
Intersegment revenues16 — — 68 — (84)— 
Revenue1,663 1,015 539 376 — (84)3,509 
Fuel and purchased power(a)
(355)(360)— — — 60 (655)
Natural gas purchased for resale(a)
(37)— (147)— — — (184)
Other operations and maintenance expenses(a)
(501)(289)(117)(35)(17)24 (935)
Other segment items
Depreciation and amortization(403)(186)(66)(79)(3)— (737)
Taxes other than income taxes(178)(36)(41)(4)(7)— (266)
Other income, net93 49 14 6 38 (8)192 
Interest charges(125)(48)(30)(58)(66)8 (319)
Income (taxes) benefit(2)(27)(40)(55)41 — (83)
Noncontrolling interests – preferred stock dividends(2)(1)— — — — (3)
Net income (loss) attributable to Ameren common shareholders153 117 112 151 
(b)
(14)— 519 
Interest income5 15 — 1 8 (8)21 
Capital expenditures1,104 316 119 341 4 8 1,892 
(a)Significant segment expense that is regularly provided to the CODMs. Intersegment expenses are included within the amounts shown.
(b)Ameren Transmission earnings reflect an allocation of financing costs from Ameren (parent).
Ameren Illinois
Ameren Illinois Electric DistributionAmeren Illinois Natural GasAmeren Illinois TransmissionIntersegment EliminationsAmeren Illinois
Three Months 2025:
External revenues$573 $158 $112 $— $843 
Intersegment revenues— — 40 (40)— 
Revenue573 158 152 (40)843 
Purchased power(a)
(223)— — 40 (183)
Natural gas purchased for resale(a)
— (30)— — (30)
Other operations and maintenance expenses(a)
(156)(55)(14)— (225)
Other segment items
Depreciation and amortization(93)(33)(37)— (163)
Taxes other than income taxes(20)(16)(1)— (37)
Other income, net23 5 9 — 37 
Interest charges(26)(16)(21)— (63)
Income taxes(13)(3)(25)— (41)
Noncontrolling interests – preferred stock dividends(1)— — — (1)
Net income available to common shareholder64 10 63 — 137 
Interest income8 — — — 8 
Capital expenditures153 88 138 — 379 
Three Months 2024:
External revenues$509 $148 $109 $— $766 
Intersegment revenues— — 27 (27)— 
Revenue509 148 136 (27)766 
Purchased power(a)
(168)— — 27 (141)
Natural gas purchased for resale(a)
— (24)— — (24)
Other operations and maintenance expenses(a)
(153)(59)(12)— (224)
Other segment items
Depreciation and amortization(93)(33)(28)— (154)
Taxes other than income taxes(19)(15)(1)— (35)
Other income, net27 7 3 — 37 
Interest charges(26)(15)(19)— (60)
Income taxes(15)(3)(22)— (40)
Noncontrolling interests – preferred stock dividends(1)— — — (1)
Net income available to common shareholder61 6 57 — 124 
Interest income9 — — — 9 
Capital expenditures132 59 153 — 344 
Ameren Illinois Electric DistributionAmeren Illinois Natural GasAmeren Illinois TransmissionIntersegment EliminationsAmeren Illinois
Six Months 2025:
External revenues$1,145 $569 $229 $— $1,943 
Intersegment revenues— — 77 (77)— 
Revenue1,145 569 306 (77)1,943 
Purchased power(a)
(435)— — 77 (358)
Natural gas purchased for resale(a)
— (169)— — (169)
Other operations and maintenance expenses(a)
(322)(110)(29)— (461)
Other segment items
Depreciation and amortization(184)(65)(73)— (322)
Taxes other than income taxes(41)(45)(2)— (88)
Other income, net46 10 15 — 71 
Interest charges(52)(31)(42)— (125)
Income taxes(29)(41)(47)— (117)
Noncontrolling interests – preferred stock dividends(1)— — — (1)
Net income available to common shareholder127 118 128 — 373 
Interest income16 — 1 — 17 
Capital expenditures320 147 275 — 742 
Six Months 2024:
External revenues$1,015 $539 $212 $— $1,766 
Intersegment revenues— — 55 (55)— 
Revenue1,015 539 267 (55)1,766 
Purchased power(a)
(360)— — 55 (305)
Natural gas purchased for resale(a)
— (147)— — (147)
Other operations and maintenance expenses(a)
(289)(117)(28)— (434)
Other segment items
Depreciation and amortization(186)(66)(55)— (307)
Taxes other than income taxes(36)(41)(2)— (79)
Other income, net49 14 5 — 68 
Interest charges(48)(30)(37)— (115)
Income taxes(27)(40)(40)— (107)
Noncontrolling interests – preferred stock dividends(1)— — — (1)
Net income available to common shareholder117 112 110 — 339 
Interest income15 — — — 15 
Capital expenditures316 119 282 — 717 
(a)Significant segment expense that is regularly provided to the CODMs. Intersegment expenses are included within the amounts shown.
Disaggregation of Revenue
The following tables present disaggregated revenues by segment at Ameren and Ameren Illinois for the three and six months ended June 30, 2025 and 2024. 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 MissouriAmeren Illinois Electric DistributionAmeren Illinois Natural GasAmeren TransmissionIntersegment EliminationsAmeren
Three Months 2025:
Residential$405 $321 $— $— $— $726 
Commercial344 181 — — — 525 
Industrial84 48 — — — 132 
Other482 23 — 208 (58)655 
Total electric revenues$1,315 $573 $— $208 $(58)$2,038 
Residential$13 $— $107 $— $— $120 
Commercial5 — 28 — — 33 
Industrial1 — 3 — — 4 
Other6 — 20 

— — 26 
Total natural gas revenues$25 $— $158 $— $— $183 
Total revenues(a)
$1,340 $573 $158 $208 $(58)$2,221 
Three Months 2024:
Residential$395 $311 $— $— $— $706 
Commercial324 163 — — — 487 
Industrial77 47 — — — 124 
Other68 

(12)
(b)
— 191 (43)204 

Total electric revenues$864 $509 $— $191 $(43)$1,521 
Residential$13 $— $102 $— $— $115 
Commercial5 — 24 — — 29 
Industrial1 — 1 — — 2 
Other5 — 21 — — 26 
Total natural gas revenues$24 $— $148 $— $— $172 
Total revenues(a)
$888 $509 $148 $191 $(43)$1,693 
Six Months 2025:
Residential$781 $663 $— $— $— $1,444 
Commercial617 361 — — — 978 
Industrial150 98 — — — 248 
Other660 23 — 418 (111)990 
Total electric revenues$2,208 $1,145 $— $418 $(111)$3,660 
Residential$56 $— $416 $— $— $472 
Commercial24 — 105 — — 129 
Industrial3 — 7 — — 10 
Other6 — 41 — — 47 
Total natural gas revenues$89 $— $569 $— $— $658 
Total revenues(a)
$2,297 $1,145 $569 $418 $(111)$4,318 
Six Months 2024:
Residential$736 $608 $— $— $— $1,344 
Commercial583 328 — — — 911 
Industrial138 92 — — — 230 
Other121 (13)
(b)
— 376 (84)400 
Total electric revenues$1,578 $1,015 $— $376 $(84)$2,885 
Residential$53 $— $389 $— $— $442 
Commercial21 — 92 — — 113 
Industrial3 — 5 — — 8 
Other8 — 53 — — 61 
Total natural gas revenues$85 $— $539 $— $— $624 
Total revenues(a)
$1,663 $1,015 $539 $376 $(84)$3,509 
(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, 2025 and 2024:
Ameren MissouriAmeren Illinois Electric DistributionAmeren Illinois Natural GasAmeren TransmissionIntersegment EliminationsAmeren
Three Months 2025:
Revenues from alternative revenue programs$1 $(8)$1 $(8)$— $(14)
Other revenues not from contracts with customers2 5 1 — (4)4 
Three Months 2024:
Revenues from alternative revenue programs$(1)$22 $— $4 $— $25 
Other revenues not from contracts with customers1 1 1 — — 3 
Six Months 2025:
Revenues from alternative revenue programs$(4)$13 $4 $(9)$— $4 
Other revenues not from contracts with customers3 8 2 — (4)9 
Six Months 2024:
Revenues from alternative revenue programs$(7)$61 $19 $13 $— $86 
Other revenues not from contracts with customers2 3 2 — — 7 
(b)Includes over-recoveries of various riders.
Ameren Illinois
Ameren Illinois Electric DistributionAmeren Illinois Natural GasAmeren Illinois TransmissionIntersegment EliminationsAmeren Illinois
Three Months 2025:
Residential$321 $107 $— $— $428 
Commercial181 28 — — 209 
Industrial48 3 — — 51 
Other23 20 

152 (40)155 
Total revenues(a)
$573 $158 $152 $(40)$843 
Three Months 2024:
Residential$311 $102 $— $— $413 
Commercial163 24 — — 187 
Industrial47 1 — — 48 
Other(12)
(b)
21 136 (27)118 
Total revenues(a)
$509 $148 $136 $(27)$766 
Six Months 2025:
Residential$663 $416 $— $— $1,079 
Commercial361 105 — — 466 
Industrial98 7 — — 105 
Other23 41 306 (77)293 
Total revenues(a)
$1,145 $569 $306 $(77)$1,943 
Six Months 2024:
Residential$608 $389 $— $— $997 
Commercial328 92 — — 420 
Industrial92 5 — — 97 
Other(13)
(b)
53 267 (55)252 
Total revenues(a)
$1,015 $539 $267 $(55)$1,766 
(a)The following table presents increases/(decreases) in revenues from alternative revenue programs and other revenues not from contracts with customers for the Ameren Illinois segments for the three and six months ended June 30, 2025 and 2024:
Ameren Illinois Electric DistributionAmeren Illinois Natural GasAmeren Illinois TransmissionAmeren Illinois
Three Months 2025:
Revenues from alternative revenue programs$(8)$1 $(7)$(14)
Other revenues not from contracts with customers5 1 — 6 
Three Months 2024:
Revenues from alternative revenue programs$22 $— $2 $24 
Other revenues not from contracts with customers1 1 — 2 
Six Months 2025:
Revenues from alternative revenue programs$13 $4 $(8)$9 
Other revenues not from contracts with customers8 2 — 10 
Six Months 2024:
Revenues from alternative revenue programs$61 $19 $10 $90 
Other revenues not from contracts with customers3 2 — 5 
(b)Includes over-recoveries of various riders.