Commitments And Contingencies (Tables)

12 Months Ended

Dec. 31, 2013

Commitments and Contingencies Disclosure [Abstract]

Schedule Of Insurance Coverage At Callaway Energy Center

The following table presents insurance coverage at Ameren Missouri’s Callaway energy center at December 31, 2013. The property coverage and the nuclear liability coverage must be renewed on April 1 and January 1, respectively, of each year.



Type and Source of Coverage	Maximum Coverages			Maximum Assessments
Public liability and nuclear worker liability:
American Nuclear Insurers	$	375		$	—
Pool participation	13,241		^(a)	128		^(b)
	$	13,616	^(c)	$	128
Property damage:
Nuclear Electric Insurance Limited	$	2,250	^(d)	$	23	^(e)
European Mutual Association for Nuclear Insurance	500		^(f)	—
	$	2,750		$	23
Replacement power:
Nuclear Electric Insurance Limited	$	490	^(g)	$	9	^(e)
Missouri Energy Risk Assurance Company	$	64	^(h)	$	—


(a)	Provided through mandatory participation in an industrywide retrospective premium assessment program.


(b)	Retrospective premium under the Price-Anderson Act. 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 United States commercial reactor, payable at $19 million per year.

(c)

Limit of liability for each incident under the Price-Anderson Act liability provisions of the Atomic Energy Act of 1954, as amended. A company could be assessed up to $128 million per incident for each licensed reactor it operates with a maximum of $19 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)	Nuclear Electric Insurance Limited provides $2.25 billion in property damage, decontamination, and premature decommissioning insurance. There is a $1.7 billion sublimit for non-radiation events, of which the top $200 million is a shared limit with other generators purchasing this coverage and includes one free reinstatement.


(e)	All Nuclear Electric Insurance Limited insured plants could be subject to assessments should losses exceed the accumulated funds from Nuclear Electric Insurance Limited.


(f)	European Mutual Association for Nuclear Insurance provides $500 million in excess of the $2.25 billion property coverage and $1.7 billion non-radiation coverage.

(g)

Provides 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. Effective April 1, 2013, non-radiation events are sub-limited to $327.6 million.

(h)

Provides 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 Limited and is a weekly indemnity of $900,000 for 71 weeks in excess of the $3.6 million per week set forth above. Missouri Energy Risk Assurance Company LLC is an affiliate and has reinsured this coverage with third-party insurance companies. See Note 14 – Related Party Transactions for more information on this affiliate transaction.

Schedule Of Lease Obligations

We lease various facilities, office equipment, plant equipment, and rail cars under capital and operating leases. The following table presents our lease obligations at December 31, 2013:



	Total		2014		2015		2016		2017		2018		After 5 Years
Ameren:^(a)
Minimum capital lease payments^(b)	$	556	$	32	$	33	$	33	$	33	$	32	$	393
Less amount representing interest	257		27		27		27		27		26		123
Present value of minimum capital lease payments	$	299	$	5	$	6	$	6	$	6	$	6	$	270
Operating leases^(c)	117		14		13		13		13		13		51
Total lease obligations	$	416	$	19	$	19	$	19	$	19	$	19	$	321
Ameren Missouri:
Minimum capital lease payments^(b)	$	556	$	32	$	33	$	33	$	33	$	32	$	393
Less amount representing interest	257		27		27		27		27		26		123
Present value of minimum capital lease payments	$	299	$	5	$	6	$	6	$	6	$	6	$	270
Operating leases^(c)	106		11		11		11		12		11		50
Total lease obligations	$	405	$	16	$	17	$	17	$	18	$	17	$	320
Ameren Illinois:
Operating leases^(c)	$	7	$	2	$	1	$	1	$	1	$	1	$	1


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


(b)	See Properties under Part I, Item 2, and Note 3 – Property and Plant, Net, of this report for additional information.


(c)	Amounts related to certain land-related leases have indefinite payment periods. The annual obligation of $2 million, $1 million and $1 million for Ameren, Ameren Missouri and Ameren Illinois for these items is included in the 2014 through 2018 columns, respectively.

Schedule Of Rental Expense

The following table presents total rental expense, included in operating expenses, for the years ended December 31, 2013, 2012, and 2011:



	2013		2012		2011
Ameren^(a)	$	32	$	33	$	36
Ameren Missouri	29		29		29
Ameren Illinois	21		19		17


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

Schedule Of Estimated Purchased Commitments

The table below presents our estimated commitments at December 31, 2013. Ameren’s and Ameren Missouri’s purchased power obligations include a 102-megawatt power purchase agreement with a wind farm operator that expires in 2024. Ameren’s and Ameren Illinois’ purchased power obligations include the Ameren Illinois power purchase agreements entered into as part of the IPA-administered power procurement process. Included in the Other column are minimum purchase commitments under contracts for equipment, design and construction, and meter reading services at December 31, 2013. Ameren's and Ameren Illinois' Other column also include obligations related to IEIMA. In addition, the Other column includes Ameren's and Ameren Missouri's obligations related to energy efficiency programs under the MEEIA as approved by the MoPSC's December 2012 electric rate order. Ameren Missouri expects to incur $48 million in 2014 and $64 million in 2015 for these energy efficiency programs. See Note 2 – Rate and Regulatory Matters for additional information about the IEIMA and MEEIA.



	Coal		Natural Gas^(a)		Nuclear Fuel		Purchased Power^(b)		Methane Gas		Other		Total
Ameren:^(c)
2014	$	620	$	323	$	64	$	308	$	3	$	201	$	1,519
2015	642		179		63		164		4		143		1,195
2016	664		90		81		78		4		76		993
2017	676		45		58		55		4		50		888
2018	120		28		57		52		5		51		313
Thereafter	125		82		158		635		91		350		1,441
Total	$	2,847	$	747	$	481	$	1,292	$	111	$	871	$	6,349
Ameren Missouri:
2014	$	620	$	62	$	64	$	19	$	3	$	127	$	895
2015	642		32		63		19		4		101		861
2016	664		19		81		19		4		40		827
2017	676		11		58		19		4		26		794
2018	120		8		57		19		5		27		236
Thereafter	125		28		158		110		91		183		695
Total	$	2,847	$	160	$	481	$	205	$	111	$	504	$	4,308
Ameren Illinois:
2014	$	—	$	261	$	—	$	289	$	—	$	23	$	573
2015	—		147		—		145		—		24		316
2016	—		71		—		59		—		24		154
2017	—		34		—		36		—		24		94
2018	—		20		—		33		—		24		77
Thereafter	—		54		—		525		—		167		746
Total	$	—	$	587	$	—	$	1,087	$	—	$	286	$	1,960


(a)	Includes amounts for generation and for distribution.

(b)

The purchased power amounts for Ameren and Ameren Illinois include 20-year agreements for renewable energy credits that were entered into in December 2010 with various renewable energy suppliers. The agreements contain a provision that allows Ameren Illinois to reduce the quantity purchased in the event that Ameren Illinois would not be able to recover the costs associated with the renewable energy credits.


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

Schedule Of Estimated Obligations For Manufactured Gas Plant Remediation

The following table presents, as of December 31, 2013, the estimated obligation to complete the remediation of these former MGP sites.



	Estimate				Recorded Liability^(a)
	Low		High		Recorded Liability^(a)
Ameren	$	278	$	338	$	278
Ameren Missouri	4		5		4
Ameren Illinois	274		333		274


(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

The following table presents the pending asbestos-related lawsuits filed against the Ameren Companies as of December 31, 2013:


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

- Definition

The entire disclosure for environmental loss contingencies, such as presence of hazardous waste, relevant information from reports issued by regulators, and estimated costs to achieve compliance with regulatory requirements. This element may be used for all of an entity's disclosures about environmental loss contingencies.

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- Definition

The entire disclosure for lessee entity's leasing arrangements including, but not limited to, all of the following: (a.) The basis on which contingent rental payments are determined, (b.) The existence and terms of renewal or purchase options and escalation clauses, (c.) Restrictions imposed by lease agreements, such as those concerning dividends, additional debt, and further leasing.

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- Definition

Tabular disclosure of a lessee's leasing arrangements including: (1) the basis on which contingent rental payments are determined, (2) the existence and terms of renewal or purchase options and escalation clauses, (3) restrictions imposed by lease arrangements, such as those concerning dividends, additional debt, and further leasing, (4) rent holidays, rent concessions, or leasehold improvement incentives and unusual provisions or conditions. Disclosure may also include the specific period used to amortize material leasehold improvements made at the inception of the lease or during the lease term. Additionally, for operating leases having initial or remaining noncancelable lease terms in excess of one year: (a) future minimum rental payments required as of the date of the latest balance sheet presented, in the aggregate and for each of the five succeeding fiscal years, (b) the total of minimum rentals to be received in the future under noncancelable subleases as of the date of the latest balance sheet presented, and (c) for all operating leases, rental expense for each period for which an income statement is presented, with separate amounts for minimum rentals, contingent rentals, and sublease rentals. Rental payments under leases with terms of a month or less that were not renewed need not be included.

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Ameren
Missouri

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Illinois