Commitments And Contingencies (Tables)

9 Months Ended

Sep. 30, 2011

Commitments And Contingencies [Abstract]

Schedule Of Insurance Coverage At Callaway Energy Center

Type and Source of Coverage	Maximum Coverages			Maximum Assessments for Single Incidents
Public liability and nuclear worker liability:
American Nuclear Insurers	$	375		$	-
Pool participation		12,219	(a)		118	(b)
	$	12,594	(c)	$	118
Property damage:
Nuclear Electric Insurance Ltd.	$	2,750	(d)	$	23
Replacement power:
Nuclear Electric Insurance Ltd	$	490	(e)	$	9
Energy Risk Assurance Company	$	64	(f)	$	-

(a) Provided through mandatory participation in an industry-wide retrospective premium assessment program.

(b) Retrospective premium under Price-Anderson. This is subject to retrospective assessment with respect to a covered loss in excess of $375 million in the event of an incident at any licensed U.S. commercial reactor, payable at $17.5 million per year.

(c) Limit of liability for each incident under the Price-Anderson liability provisions of the Atomic Energy Act of 1954, as amended. A company could be assessed up to $118 million per incident for each licensed reactor it operates with a maximum of $17.5 million per incident to be paid in a calendar year for each reactor. This limit is subject to change to account for the effects of inflation and changes in the number of licensed reactors.

(d) Provides for $500 million in property damage and decontamination, excess property insurance, and premature decommissioning coverage up to $2.25 billion for losses in excess of the $500 million primary coverage.

(e) Provides the replacement power cost insurance in the event of a prolonged accidental outage at our nuclear energy center. Weekly indemnity up to $4.5 million for 52 weeks, which commences after the first eight weeks of an outage, plus up to $3.6 million per week for a minimum of 71 weeks thereafter for a total not exceeding the policy limit of $490 million.

(f) Provides the replacement power cost insurance in the event of a prolonged accidental outage at our nuclear energy center. The coverage commences after the first 52 weeks of insurance coverage from Nuclear Electric Insurance Ltd. and is for a weekly indemnity of $900,000 for 71 weeks in excess of the $3.6 million per week set forth above. Energy Risk Assurance Company is an affiliate and has reinsured this coverage with third-party insurance companies. See Note 8 - Related Party Transactions for more information on this affiliate transaction.

Schedule Of Estimated Purchased Commitments

	Coal		Natural Gas		Nuclear		Purchased Power		Methane Gas		Other		Total
Ameren:(a)
2011	$	215	$	121	$	50	$	61	$	-	$	138	$	585
2012		1,134		417		36		196		1		169		1,953
2013		785		304		38		310		3		79		1,519
2014		698		224		114		125		3		79		1,243
2015		691		118		74		51		3		52		989
Thereafter		1,653		186		397		798		98		262		3,394
Total	$	5,176	$	1,370	$	709	$	1,541	$	108	$	779	$	9,683
Ameren Missouri:
2011	$	106	$	17	$	50	$	6	$	-	$	83	$	262
2012		618		65		36		19		1		70		809
2013		609		47		38		19		3		48		764
2014		630		34		114		19		3		47		847
2015		620		20		74		19		3		28		764
Thereafter		1,589		39		397		175		98		160		2,458
Total	$	4,172	$	222	$	709	$	257	$	108	$	436	$	5,904
Ameren Illinois:
2011	$	-	$	99	$	-	$	55	$	-	$	11	$	165
2012		-		342		-		177		-		21		540
2013		-		255		-		290		-		22		567
2014		-		186		-		106		-		22		314
2015		-		96		-		32		-		24		152
Thereafter		-		146		-		624		-		102		872
Total	$	-	$	1,124	$	-	$	1,284	$	-	$	202	$	2,610
Genco:
2011	$	78	$	3	$	-	$	-	$	-	$	40	$	121
2012		376		6		-		-		-		54		436
2013		96		3		-		-		-		8		107
2014		41		3		-		-		-		8		52
2015		42		2		-		-		-		-		44
Thereafter		-		-		-		-		-		-		-
Total	$	633	$	17	$	-	$	-	$	-	$	110	$	760

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.

Schedule Of Estimated Capital Costs To Comply With Existing And Known Emissions Related Regulations

	2011		2012 - 2015					2016 - 2020					Total
AMO(a)	$	40	$	315	-	$	390	$	905	-	$	1,105	$	1,260	-	$	1,535
Genco		90		385	-		470		50	-		60		525	-		620
AERG		10		90	-		110		15	-		20		115	-		140
Ameren	$	140	$	790	-	$	970	$	970	-	$	1,185	$	1,900	-	$	2,295

(a) Ameren Missouri's expenditures are expected to be recoverable from ratepayers.

Schedule Of Estimated Obligations For Manufactured Gas Plant Remediation

	Estimate
	Low		High		Recorded    Liability(a)
Ameren	$	112	$	191	$	112
Ameren Missouri		3		4		3
Ameren Illinois		109		187		109

(a) Recorded liability represents the estimated minimum probable obligations, as no other amount within the range provided a better estimate.

Schedule Of Asbestos-Related Litigation Pending Lawsuits

Ameren	Ameren Missouri	Ameren Illinois	Genco	Total(a)
5	64	81	(b)	107

(a) Total does not equal the sum of the subsidiary unit lawsuits because some of the lawsuits name multiple Ameren entities as defendants.

(b) As of September 30, 2011, six asbestos-related lawsuits were pending against EEI. The general liability insurance maintained by EEI provides coverage with respect to liabilities arising from asbestos-related claims.