Short-Term Debt And Liquidity (Tables)

12 Months Ended

Dec. 31, 2024

Line of Credit Facility [Abstract]

Schedule Of Maximum Aggregate Amount Available On Credit Agreements

The following table presents the maximum aggregate amount available to each borrower under each facility:

	Missouri Credit Agreement		Illinois Credit Agreement
Ameren (parent)	$	1,000	$	700
Ameren Missouri	1,000		(a)
Ameren Illinois	(a)		1,000

(a)Not applicable.

Schedule of Commercial Paper

The following table summarizes the activity and relevant interest rates for Ameren (parent)’s, Ameren Missouri’s, and Ameren Illinois’ commercial paper issuances under the Credit Agreements in the aggregate for the years ended December 31, 2024 and 2023:

	Ameren (parent)			Ameren Missouri			Ameren Illinois			Ameren Consolidated
2024
Average daily amount outstanding	$	377		$	192		$	193		$	762
Commercial paper issuances outstanding at period-end	1,055			—			88			1,143
Weighted-average interest rate	5.10		%	5.34		%	5.57		%	5.28		%
Peak amount outstanding during period(a)	$	1,091		$	595		$	694		$	1,569
Peak interest rate	5.60		%	5.68		%	5.68		%	5.68		%
2023
Average daily amount outstanding	$	726		$	274		$	166		$	1,166
Commercial paper issuances outstanding at period-end	—			170			366			536
Weighted-average interest rate	5.38		%	5.22		%	5.23		%	5.32		%
Peak amount outstanding during period(a)	$	1,298		$	592		$	450		$	1,526
Peak interest rate	5.65		%	5.68		%	5.68		%	5.68		%

(a)    The timing of peak outstanding commercial paper issuances and borrowings under the Credit Agreements varies by company. Therefore, the sum of individual company peak amounts may not equal the Ameren consolidated peak amount for the period.