Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2022

The following table presents the specified performance period, average price per MWh, and amount of MWhs included in the agreements:


IPA Procurement Event	Performance Period	MWhs	Average Price per MWh
April 2019	January 2020 – December 2021	288,000	$	35
September 2019	April 2020 – November 2021	170,800	29
September 2020	September 2021 – November 2022	204,800	31
April 2021	July 2022 – November 2022	33,600	34
September 2021	January 2022 – September 2023	136,000	37

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 December 31, 2022 and 2021:


	2022				2021
	Ameren Missouri		Ameren Illinois		Ameren Missouri		Ameren Illinois
Income taxes payable to parent(a)	$	—	$	50	$	—	$	8
Income taxes receivable from parent(b)	39		—		27		18

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

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

Schedule of Capital Contributions

The following table presents cash capital contributions received from Ameren (parent) by Ameren Missouri and Ameren Illinois for the years ended December 31, 2022, 2021, and 2020:


	2022		2021		2020
Ameren Missouri(a)	$	—	$	207	$	491
Ameren Illinois(a)	15		262		464

(a)Includes capital contributions made as a result of the tax allocation agreement.

Schedule of Related Party Transactions

The following table presents the impact on Ameren Missouri and Ameren Illinois of related-party transactions for the years ended December 31, 2022, 2021, and 2020. It is based primarily on the agreements discussed above and the money pool arrangements discussed in Note 4 – Short-term Debt and Liquidity.


Agreement	Income Statement Line Item			Ameren Missouri		Ameren Illinois
Ameren Missouri power supply agreements	Operating Revenues	2022	$	9	$	(a)
with Ameren Illinois		2021		16		(a)
		2020		11		(a)
Ameren Missouri and Ameren Illinois	Operating Revenues	2022		25		(b)
rent and facility services		2021		26		1
		2020		26		1
Ameren Missouri and Ameren Illinois	Operating Revenues	2022		(b)		2
miscellaneous support services		2021		(b)		5
		2020		3		1



Total Operating Revenues		2022	$	34	$	2
		2021		42		6
		2020		40		2
Ameren Illinois power supply	Purchased Power	2022	$	(a)	$	9
agreements with Ameren Missouri		2021		(a)		16
		2020		(a)		11
Ameren Missouri and Ameren Illinois	Purchased Power	2022		1		(b)
transmission services from ATXI		2021		4		1
		2020		(a)		2
Total Purchased Power		2022	$	1	$	9
		2021		4		17
		2020		(a)		13
Ameren Missouri and Ameren Illinois	Other Operations and	2022	$	(b)	$	3
rent and facility services	Maintenance	2021		1		4
		2020		(b)		4
Ameren Services support services	Other Operations and	2022		150		141
agreement	Maintenance	2021		147		137
		2020		140		133
Total Other Operations and		2022	$	150	$	144
Maintenance Expenses		2021		148		141
		2020		140		137
Money pool borrowings (advances)	(Interest Charges)	2022	$	(b)	$	(b)
	Other Income, Net	2021		(b)		(b)
		2020		(b)		(b)

(a)Not applicable.

(b)Amount less than $1 million.