Long-Term Debt And Equity Financings (Tables)

12 Months Ended

Dec. 31, 2011

Long-Term Debt And Equity Financings [Abstract]

Schedule Of Maturities Of Long-Term Debt

	Ameren   (Parent)(a)		Ameren Missouri(a)		Ameren Illinois(a)(b)		Genco(a)		Ameren Consolidated
2012	$	-	$	178	$	1	$	-	$	179
2013		-		205		150		-		355
2014		425		109		51		-		585
2015		-		120		-		-		120
2016		-		266		129		-		395
Thereafter		-		3,077		1,330		825		5,232
Total	$	425	$	3,955	$	1,661	$	825	$	6,866

(a) Excludes unamortized discount and premium of $1 million, $5 million, $8 million and $1 million at Ameren (Parent), Ameren Missouri, Ameren Illinois and Genco, respectively.

(b) Excludes $5 million related to Ameren Illinois' long-term debt fair-market value adjustments, which are being amortized to interest expense over the remaining life of the debt.

Schedule Of Outstanding Preferred Stock

		Redemption Price (per share)		2011		2010
Ameren Missouri:
Without par value and stated value of $100 per share, 25 million shares authorized
$3.50 Series	130,000 shares	$	110.00	$	13	$	13
$3.70 Series	40,000 shares		104.75		4		4
$4.00 Series	150,000 shares		105.625		15		15
$4.30 Series	40,000 shares		105.00		4		4
$4.50 Series	213,595 shares		110.00(a)		21		21
$4.56 Series	200,000 shares		102.47		20		20
$4.75 Series	20,000 shares		102.176		2		2
$5.50 Series A	14,000 shares		110.00		1		1
Total				$	80	$	80
Ameren Illinois:
With par value of $100 per share, 2 million shares authorized
4.00% Series	144,275 shares	$	101.00	$	14	$	14
4.08% Series	45,224 shares		103.00		5		5
4.20% Series	23,655 shares		104.00		2		2
4.25% Series	50,000 shares		102.00		5		5
4.26% Series	16,621 shares		103.00		2		2
4.42% Series	16,190 shares		103.00		2		2
4.70% Series	18,429 shares		103.00		2		2
4.90% Series	73,825 shares		102.00		7		7
4.92% Series	49,289 shares		103.50		5		5
5.16% Series	50,000 shares		102.00		5		5
6.625% Series	124,273.75 shares		100.00		12		12
7.75% Series	4,542 shares		100.00		1		1
Total				$	62	$	62
Total Ameren				$	142	$	142

(a) In the event of voluntary liquidation, $105.50.