Short-Term Debt And Liquidity (Tables)

6 Months Ended

Jun. 30, 2012

Borrowing Activity On Credit Agreements

2010 Missouri Credit Agreement ($800 million)	Ameren (Parent)		Ameren Missouri			Total
Average daily borrowings outstanding during 2012	$	-	$	2		$	2
Outstanding credit facility borrowings at period end		-		-			-
Weighted-average interest rate during 2012		-		4.15	%		4.15	%
Peak credit facility borrowings during 2012	$	-	$	50		$	50
Peak interest rate during 2012		-		4.15	%		4.15	%

Ameren Missouri [Member]

Borrowing Activity On Credit Agreements

2010 Missouri Credit Agreement ($800 million)	Ameren (Parent)		Ameren Missouri			Total
Average daily borrowings outstanding during 2012	$	-	$	2		$	2
Outstanding credit facility borrowings at period end		-		-			-
Weighted-average interest rate during 2012		-		4.15	%		4.15	%
Peak credit facility borrowings during 2012	$	-	$	50		$	50
Peak interest rate during 2012		-		4.15	%		4.15	%