Company: AILIM
Filing Date: 2025-02-18
Form Type: 10-K
Source: 0001002910-25-000055
Chunk: 260

Company: Ameren Illinois Co
Filing Date: 2025-02-18
Form: 10-K
Item: Item 7
Chunk 260
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 gas purchased for resale expenses are fully offset by changes in natural gas revenues under the PGA.

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Table of Contents

Other Operations and Maintenance Expenses

Total by Segment(a)Increase (Decrease) by SegmentOverall Ameren Increase of $103 Million

(a)Includes $70 million and $60 million at Ameren Transmission in 2024 and 2023, respectively, and other/intersegment eliminations of $0 million and $34 million in 2024 and 2023, respectively.

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

Ameren

Other operations and maintenance expenses increased $103 million in 2024, compared with 2023 because of the changes discussed below. In addition to changes by segment as discussed below, other operations and maintenance expenses decreased $34 million in 2024 for activity not reported as part of a segment, as reflected in “Other/Intersegment Eliminations” above, primarily because of a $14 million increase in the elimination of intercompany rent related to ATXI’s operations control center discussed below; a $10 million increase in the elimination of the non-service cost component of net periodic benefit income at Ameren Services; and a $8 million gain on the sale of land. The non-service cost component of net periodic benefit cost or income at Ameren Services is allocated to the segments and primarily included in the segments’ other operations and maintenance expenses.

Ameren Transmission

Other operations and maintenance expenses increased $10 million in 2024, compared with 2023, primarily because of increased costs related to ATXI’s operations control center, which was placed in service in December 2023. ATXI provides affiliates with access to this facility. The rent expense associated with this facility is an affiliate transaction and eliminated in consolidation for purposes of Ameren’s consolidated financial statements. See Note 13 - Related-party Transactions under Part II, Item 8, of this report for additional information.

Ameren Missouri

Other operations and maintenance expenses increased $47 million in 2024, compared with 2023, primarily due to the following items:

•A $59 million charge related to an order from the United States District Court for the Eastern District of Missouri, which resolved all outstanding claims in the NSR and Clean Air Act litigation related to the Rush Island Energy Center, see Note 14 - Commitments and Contingencies under Part II, Item 8, of