Company: AILIM
Filing Date: 2025-11-06
Form Type: 10-Q
Source: 0001002910-25-000129
Chunk: 146

Company: Ameren Illinois Co
Filing Date: 2025-11-06
Form: 10-Q
Item: Part I, Item 1
Chunk 146
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 (YTD YoY)Total by Segment(a)

(a)Includes other/intersegment eliminations of $2 million and $2 million in the three months ended September 30, 2025 and 2024, respectively. Also includes other/intersegment eliminations of $6 million and $5 million in the nine months ended September 30, 2025 and 2024, respectively.    

Ameren MissouriAmeren Illinois Natural GasOther/Intersegment EliminationsAmeren Illinois Electric DistributionAmeren Transmission

Depreciation and amortization expenses increased $27 million, $19 million, and $7 million in the three months ended September 30, 2025, compared with the year-ago period at Ameren, Ameren Missouri, and Ameren Transmission, respectively, primarily because of additional property, plant, and equipment investments. Depreciation and amortization expenses increased $43 million, $25 million, and $19 million in the nine months ended September 30, 2025, compared with the year-ago period at Ameren, Ameren Transmission, and Ameren Missouri, respectively, primarily because of additional property, plant, and equipment investments. Ameren’s and Ameren Missouri’s depreciation and amortization expenses for the three and nine months ended September 30, 2025, compared with the year-ago periods, were affected by the following, which include the effect of the additional investments at Ameren Missouri:

•Increased depreciation and amortization of $16 million and $21 million, respectively, due to the inclusion in base rates of property, plant, and equipment previously eligible for deferral to a regulatory asset under the PISA and RESRAM effective June 1, 2025, pursuant to the April 2025 MoPSC electric rate order.

•The amortization of a regulatory asset associated with the securitization of Ameren Missouri’s Rush Island Energy Center increased depreciation and amortization expenses by $5 million and $16 million, respectively.

•Depreciation and amortization expenses reflected a deferral to a regulatory asset of depreciation associated with investments in eligible property, plant, and equipment not yet included in base rates, pursuant to PISA. Base rates were updated to include the eligible property, plant, and equipment in-service through December 31, 2024, when new customer rates became effective on June 1, 2025, pursuant to the April 2025 MoPSC electric rate order. The effect of rebasing P