The following table presents the impact on Ameren Missouri and Ameren Illinois of related party transactions for the three months ended March 31, 2014, and 2013. It is based primarily on the agreements discussed above and in Note 14 - Related Party Transactions under Part II, Item 8, of the Form 10-K, and the money pool arrangements discussed in Note 3 - Short-term Debt and Liquidity of this report.



				Three Months
Agreement	Income Statement Line Item			Ameren Missouri		Ameren Illinois
Ameren Missouri power supply	Operating Revenues	2014	$	(b)	$	(a)
agreements with Ameren Illinois		2013		1		(a)
Ameren Missouri and Ameren Illinois	Operating Revenues	2014		5		(b)
rent and facility services		2013		5		(b)
Total Operating Revenues		2014	$	5	$	(b)
		2013		6		(b)
Ameren Illinois power supply	Purchased Power	2014	$	(a)	$	(b)
agreements with Ameren Missouri		2013		(a)		1
Ameren Illinois transmission	Purchased Power	2014		(a)		1
services with ATXI		2013		(a)		1
Total Purchased Power		2014	$	(a)	$	1
		2013		(a)		2
Ameren Services support services	Other Operations and Maintenance	2014	$	33	$	27
agreement		2013		31		25
Insurance premiums^(c)	Other Operations and Maintenance	2014		(b)		(a)
		2013		(b)		(a)
Total Other Operations and		2014	$	33	$	27
Maintenance Expenses		2013		31		25
Money pool borrowings (advances)	Interest Charges	2014	$	(b)	$	(b)
		2013		(b)		(b)


(a)	Not applicable.


(b)	Amount less than $1 million.


(c)	Represents insurance premiums paid to Missouri Energy Risk Assurance Company LLC, an affiliate, for replacement power, property damage, and terrorism coverage.