Commitments And Contingencies (Tables)

12 Months Ended

Dec. 31, 2015

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, 2015. 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	13,114		(a)	127		(b)
	$	13,489	(c)	$	127
Property damage:
Nuclear Electric Insurance Limited	$	2,750	(d)	$	27	(e)
European Mutual Association for Nuclear Insurance	500		(f)	—
	$	3,250		$	27
Replacement power:
Nuclear Electric Insurance Limited	$	490	(g)	$	10	(e)

(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 liability provisions of the Atomic Energy Act of 1954, as amended. A company could be assessed up to $127 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) NEIL provides $2.25 billion in property damage, decontamination, and premature decommissioning insurance for both radiation and nonradiation events. An additional $500 million is provided for radiation events only for a total of $2.75 billion.

(e) All NEIL-insured plants could be subject to assessments should losses exceed the accumulated funds from NEIL.

(f) European Mutual Association for Nuclear Insurance provides $500 million in excess of the $2.75 billion and $2.25 billion property coverage for radiation and nonradiation events, respectively, provided by NEIL.

(g) Provides replacement power cost insurance in the event of a prolonged accidental outage. Weekly indemnity is up to $4.5 million for 52 weeks, which commences after the first twelve 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. Nonradiation events are sub-limited to $328 million.

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, 2015:

	2016		2017		2018		2019		2020		After 5 Years		Total
Ameren:(a)
Minimum capital lease payments(b)	$	33	$	33	$	32	$	32	$	32	$	329	$	491
Less amount representing interest	27		27		26		25		25		73		203
Present value of minimum capital lease payments	$	6	$	6	$	6	$	7	$	7	$	256	$	288
Operating leases(c)	14		13		12		12		11		30		92
Total lease obligations	$	20	$	19	$	18	$	19	$	18	$	286	$	380
Ameren Missouri:
Minimum capital lease payments(b)	$	33	$	33	$	32	$	32	$	32	$	329	$	491
Less amount representing interest	27		27		26		25		25		73		203
Present value of minimum capital lease payments	$	6	$	6	$	6	$	7	$	7	$	256	$	288
Operating leases(c)	12		11		11		11		10		29		84
Total lease obligations	$	18	$	17	$	17	$	18	$	17	$	285	$	372
Ameren Illinois:
Operating leases(c)	$	1	$	1	$	1	$	1	$	1	$	1	$	6

(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 obligations of $3 million, $2 million, and $1 million for Ameren, Ameren Missouri, and Ameren Illinois for these items are included in the 2016 through 2020 columns, respectively.

Schedule Of Rental Expense

The following table presents total rental expense included in operating expenses for the years ended December 31, 2015, 2014, and 2013:

	2015		2014		2013
Ameren(a)	$	36	$	37	$	32
Ameren Missouri	34		32		29
Ameren Illinois	28		25		21

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

Schedule Of Estimated Purchased Commitments

December 31, 2015. Ameren’s and Ameren Missouri’s purchased power commitments include a 102-megawatt power purchase agreement with a wind farm operator, which expires in 2024. Ameren’s and Ameren Illinois’ purchased power commitments 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, 2015.

	Coal		Natural Gas(a)		Nuclear Fuel		Purchased Power(b)		Methane Gas		Other		Total
Ameren:(c)
2016	$	664	$	249	$	51	$	241	$	3	$	115	$	1,323
2017	685		190		46		147		4		73		1,145
2018	204		127		68		72		5		55		531
2019	110		89		24		58		5		56		342
2020	—		43		51		58		6		57		215
Thereafter	—		60		108		539		71		350		1,128
Total	$	1,663	$	758	$	348	$	1,115	$	94	$	706	$	4,684
Ameren Missouri:
2016	$	664	$	46	$	51	$	23	$	3	$	46	$	833
2017	685		36		46		23		4		32		826
2018	204		24		68		23		5		28		352
2019	110		14		24		23		5		29		205
2020	—		10		51		23		6		30		120
Thereafter	—		23		108		84		71		183		469
Total	$	1,663	$	153	$	348	$	199	$	94	$	348	$	2,805
Ameren Illinois:
2016	$	—	$	203	$	—	$	218	$	—	$	31	$	452
2017	—		154		—		124		—		25		303
2018	—		103		—		49		—		24		176
2019	—		75		—		35		—		27		137
2020	—		33		—		35		—		27		95
Thereafter	—		37		—		455		—		167		659
Total	$	—	$	605	$	—	$	916	$	—	$	301	$	1,822

(a) Includes amounts for generation and for distribution.

(b) The purchased power amounts for Ameren and Ameren Illinois include agreements through 2032 for renewable energy credits 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.

Schedule Of Asbestos-Related Litigation Pending Lawsuits

he following table presents the pending asbestos-related lawsuits filed against Ameren Missouri and Ameren Illinois as of December 31, 2015:

Ameren Missouri	Ameren Illinois	Total(a)
26	38	48

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