Related Party Transactions

3 Months Ended

Mar. 31, 2014

Related Party Transactions [Abstract]

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS

Ameren and its subsidiaries have engaged in, and may in the future engage in, affiliate transactions in the normal course of business. These transactions primarily consist of power purchases and sales, services received or rendered, and borrowings and lendings.

Transactions between affiliates are reported as intercompany transactions on their financial statements, but are eliminated in consolidation for Ameren’s financial statements. For a discussion of our material related party agreements, see Note 14 - Related Party Transactions under Part II, Item 8, of the Form 10-K.

Collateral Postings

Under the terms of the Illinois power procurement agreements entered into through an RFP process administered by the IPA, suppliers must post collateral under certain market conditions to protect Ameren Illinois in the event of nonperformance. The collateral postings are unilateral, meaning that only the suppliers would be required to post collateral. Therefore, Ameren Missouri, as a winning supplier in the RFP process, may be required to post collateral to Ameren Illinois. As of March 31, 2014, and December 31, 2013, there were no collateral postings required of Ameren Missouri related to the Illinois power procurement agreements.

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.