Short-Term Debt and Liquidity (Tables)

9 Months Ended

Sep. 30, 2022

Debt Disclosure [Abstract]

Schedule of Short-term Debt

The following table presents commercial paper outstanding, net of issuance discounts, as of September 30, 2022, and December 31, 2021. There were no borrowings outstanding under the Credit Agreements as of September 30, 2022, or December 31, 2021.

	September 30, 2022		December 31, 2021
Ameren (parent)	$	690	$	277
Ameren Missouri	178		165
Ameren Illinois	353		103
Ameren consolidated	$	1,221	$	545

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 nine months ended September 30, 2022 and 2021:

	Ameren (parent)			Ameren Missouri			Ameren Illinois			Ameren Consolidated
2022
Average daily amount outstanding	$	439		$	253		$	99		$	791
Weighted-average interest rate	1.58		%	1.16		%	1.77		%	1.47		%
Peak amount outstanding during period(a)	$	690		$	539		$	354		$	1,222
Peak interest rate	3.55		%	3.55		%	3.60		%	3.60		%
2021
Average daily amount outstanding	$	404		$	121		$	140		$	665
Weighted-average interest rate	0.23		%	0.22		%	0.22		%	0.22		%
Peak amount outstanding during period(a)	$	650		$	546		$	485		$	1,134
Peak interest rate	0.33		%	0.25		%	0.25		%	0.33		%

(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.