Related Party Transactions (Tables)

9 Months Ended

Sep. 30, 2023

Schedule of Affiliate Receivables and Payables

The following table presents the affiliate balances related to income taxes for Ameren Missouri and Ameren Illinois as of September 30, 2023, and December 31, 2022:


	September 30, 2023				December 31, 2022
	Ameren Missouri		Ameren Illinois		Ameren Missouri		Ameren Illinois
Income taxes payable to parent(a)	$	29	$	81	$	—	$	50
Income taxes receivable from parent(b)	—		—		39		—

(a)Included in “Accounts payable – affiliates” on the balance sheet.

(b)Included in “Accounts receivable – affiliates” on the balance sheet.

Schedule of Related Party Transactions

The following table presents the impact on Ameren Missouri and Ameren Illinois of related-party transactions for the three and nine months ended September 30, 2023 and 2022:


				Three Months				Nine Months
Agreement	Income Statement Line Item			Ameren Missouri		Ameren Illinois		Ameren Missouri		Ameren Illinois
Ameren Missouri power supply	Operating Revenues	2023	$	2	$	(a)	$	2	$	(a)
agreements with Ameren Illinois		2022		2		(a)		7		(a)
Ameren Missouri and Ameren Illinois	Operating Revenues	2023	$	7	$	(b)	$	25	$	(b)
rent and facility services		2022		6		(b)		18		(b)
Ameren Missouri and Ameren Illinois miscellaneous	Operating Revenues	2023	$	(b)	$	2	$	(b)	$	2
support services		2022		(b)		(b)		(b)		1
Total Operating Revenues		2023	$	9	$	2	$	27	$	2
		2022		8		(b)		25		1
Ameren Illinois power supply	Purchased Power	2023	$	(a)	$	2	$	(a)	$	2
agreements with Ameren Missouri		2022		(a)		2		(a)		7
Ameren Missouri and Ameren Illinois	Purchased Power	2023	$	(b)	$	1	$	1	$	1
transmission services from ATXI		2022		1		(b)		1		(b)
Total Purchased Power		2023	$	(b)	$	3	$	1	$	3
		2022		1		2		1		7
Ameren Missouri and Ameren Illinois	Other Operations and Maintenance	2023	$	(b)	$	(b)	$	(b)	$	2
rent and facility services		2022		(b)		1		(b)		2
Ameren Services support services	Other Operations and Maintenance	2023	$	36	$	33	$	106	$	101
agreement		2022		38		36		109		103
Total Other Operations and		2023	$	36	$	33	$	106	$	103
Maintenance		2022		38		37		109		105
Money pool borrowings (advances)	(Interest Charges)/Other Income, Net	2023	$	(b)	$	(b)	$	(b)	$	(b)
		2022		(b)		(b)		(b)		(b)

(a)Not applicable.

(b)Amount less than $1 million.