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Property And Plant, Net (Tables)
 12 Months Ended
Dec. 31, 2014
Property, Plant and Equipment [Abstract]  
Schedule Of Property And Plant, Net
The following table presents property and plant, net, for each of the Ameren Companies at December 31, 2014 and 2013:
 
 
Ameren
Missouri(a)
 
Ameren
Illinois
 
Other
 
Ameren(a)
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

2013
 
 
 
 
 
 
 
 
Property and plant, at original cost:
 
 
 
 
 
 
 
 
Electric
 
$
15,964

 
$
5,426

 
$
336

 
$
21,726

Natural gas
 
413

 
1,562

 
—

 
1,975

 
 
16,377

 
6,988

 
336

 
23,701

Less: Accumulated depreciation and amortization
 
6,766

 
1,627

 
251

 
8,644

 
 
9,611

 
5,361

 
85

 
15,057

Construction work in progress:
 
 
 
 
 
 
 
 
Nuclear fuel in process
 
246

 
—

 
—

 
246

Other
 
595

 
228

 
79

 
902

Property and plant, net
 
$
10,452

 
$
5,589

 
$
164

 
$
16,205


(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 and $228 million at December 31, 2014 and 2013, respectively. The total accumulated depreciation associated with the two CTs was $66 million and $56 million at December 31, 2014 and 2013, respectively. In addition, Ameren Missouri has investments in debt securities, which were classified as held-to-maturity, related to the two CTs from the city of Bowling Green and Audrain County. As of December 31, 2014 and 2013, the carrying value of these debt securities was $294 million and $299 million, respectively.
Accrued Capital Expenditures
The following table provides accrued capital and nuclear fuel expenditures at December 31, 2014, 2013, and 2012, which represent noncash investing activity excluded from the accompanying statements of cash flows:
 
Ameren(a)
 
Ameren
Missouri
 
Ameren
Illinois
Accrued capital expenditures:
 
 
 
 
 
2014
$
181

 
$
72

 
$
59

2013
175

 
74

 
86

2012
107

 
63

 
37

Accrued nuclear fuel expenditures:
 
 
 
 
 
2014
13

 
13

 
(b)

2013
8

 
8

 
(b)

2012
8

 
8

 
(b)


(a)
Includes amounts for Ameren registrant and nonregistrant subsidiaries.
(b)
Not applicable.