Short-Term Debt and Liquidity (Tables)

6 Months Ended

Jun. 30, 2023

Debt Disclosure [Abstract]

Schedule of Short-term Debt

The following table presents commercial paper outstanding, net of issuance discounts, as of June 30, 2023, and December 31, 2022. There were no borrowings outstanding under the Credit Agreements as of June 30, 2023, or December 31, 2022.

	June 30, 2023		December 31, 2022
Ameren (parent)	$	839	$	477
Ameren Missouri	373		329
Ameren Illinois	117		264
Ameren consolidated	$	1,329	$	1,070

The following table summarizes the activity and relevant interest rates for Ameren (parent)’s, Ameren Missouri’s, and Ameren Illinois’ commercial paper issuances and borrowings under the Credit Agreements in the aggregate for the six months ended June 30, 2023 and 2022:

	Ameren (parent)			Ameren Missouri			Ameren Illinois			Ameren Consolidated
2023
Average daily amount outstanding	$	595		$	343		$	230		$	1,168
Weighted-average interest rate	5.14		%	5.04		%	5.10		%	5.10		%
Peak amount outstanding during period(a)	$	841		$	592		$	450		$	1,381
Peak interest rate	5.55		%	5.55		%	5.60		%	5.60		%
2022
Average daily amount outstanding	$	374		$	271		$	57		$	702
Weighted-average interest rate	0.87		%	0.65		%	0.47		%	0.75		%
Peak amount outstanding during period(a)	$	595		$	539		$	142		$	1,101
Peak interest rate	2.05		%	2.05		%	2.05		%	2.05		%

(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 for the period.