Property And Plant, Net

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

The following table presents property and plant, net, for each of the Ameren Companies at December 31, 2015 and 2014:



	Ameren Missouri^(a)		Ameren Illinois		Other		Ameren^(a)
2015
Property and plant, at original cost:
Electric	$	17,521	$	7,253	$	387	$	25,161
Natural gas	445		1,997		—		2,442
	17,966		9,250		387		27,603
Less: Accumulated depreciation and amortization	7,460		2,632		255		10,347
	10,506		6,618		132		17,256
Construction work in progress:
Nuclear fuel in process	275		—		—		275
Other	402		230		636		1,268
Property and plant, net	$	11,183	$	6,848	$	768	$	18,799
2014
Property and plant, at original cost:
Electric	$	17,052	$	6,517	$	344	$	23,913
Natural gas	431		1,854		—		2,285
	17,483		8,371		344		26,198
Less: Accumulated depreciation and amortization	7,086		2,422		251		9,759
	10,397		5,949		93		16,439
Construction work in progress:
Nuclear fuel in process	209		—		—		209
Other	261		216		299		776
Property and plant, net	$	10,867	$	6,165	$	392	$	17,424

(a)

Amounts in Ameren and Ameren Missouri include two CTs under separate capital lease agreements. The gross cumulative asset value of those agreements was $233 million at December 31, 2015 and 2014. The total accumulated depreciation associated with the two CTs was $72 million and $66 million at December 31, 2015 and 2014, respectively. In addition, Ameren Missouri has investments in debt securities, which were classified as held-to-maturity and recorded in "Other assets", related to the two CTs from the city of Bowling Green and Audrain County. As of December 31, 2015 and 2014, the carrying value of these debt securities was $288 million and $294 million, respectively.

The following table provides accrued capital and nuclear fuel expenditures at December 31, 2015, 2014, and 2013, which represent noncash investing activity excluded from the accompanying statements of cash flows:



	Ameren^(a)		Ameren Missouri		Ameren Illinois
Accrued capital expenditures:
2015	$	235	$	85	$	92
2014	181		72		59
2013	175		74		86
Accrued nuclear fuel expenditures:
2015	16		16		(b)
2014	13		13		(b)
2013	8		8		(b)


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


(b)	Not applicable.