Company: AILIM
Filing Date: 2025-05-05
Form Type: 10-Q
Source: 0001002910-25-000098
Chunk: 117

Company: Ameren Illinois Co
Filing Date: 2025-05-05
Form: 10-Q
Item: Part I, Item 1
Chunk 117
---
 ended March 31, 2025, for activity not reported as part of a segment, as reflected in “Other/Intersegment Eliminations” above, primarily due to a decrease of $5 million in individually insignificant items and a $3 million decrease in the elimination of the non-service cost component of net periodic benefit income. 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 were comparable between periods. 

Ameren Missouri

Other operations and maintenance expenses decreased $4 million in the three months ended March 31, 2025, compared with the year-ago period, primarily due to the absence in 2025 of a $15 million charge related to the NSR and Clean Air Act litigation associated with the Rush Island Energy Center.

The following items partially offset the decrease in other operations and maintenance expenses for the three months ended March 31, 2025, compared with the year-ago period:

•Individually insignificant increases of $7 million in various other operations and maintenance expenses, including other labor, increased maintenance expense for cloud-related software, a decrease in the cash surrender value of COLI, and increased bad debt expense.

•Transmission and distribution storm-related costs increased $5 million in the three months ended March 31, 2025, because of the major storms experienced throughout its service territory in January and March 2025.

50

Ameren Illinois

Other operations and maintenance expenses increased $26 million in the three months ended March 31, 2025, compared with the year-ago period, primarily because of the following items:

Ameren Illinois Electric Distribution

Other operations and maintenance increased $30 million in the three months ended March 31, 2025, primarily due to the following items:

•Bad debt costs increased $13 million, primarily because of a higher base level of expenses included in customer rates pursuant to the associated rider.

•Individually insignificant increases of $7 million in various other operations and maintenance expenses including customer demand programs, increased maintenance expense for cloud-related software, customer generation rebates, and a decrease in the cash surrender value of COLI.

•Increased costs associated with customer energy-efficiency investments under formula ratemaking of $4 million, primarily due to amortization of regulatory assets.

•Increased costs of $2 million resulting from steps