Consolidated Balance Sheet - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 72	$ 5
Accounts receivable - trade (less allowance for doubtful accounts)	508	423
Unbilled revenue	234	265
Miscellaneous accounts and notes receivable	113	81
Materials and supplies	548	524
Current regulatory assets	163	295
Current accumulated deferred income taxes, net	225	352
Other current assets	103	86
Assets of discontinued operations (Note 12)	17	15
Total current assets	1,983	2,046
Property and Plant, Net	18,307	17,424
Investments and Other Assets:
Nuclear decommissioning trust fund	534	549
Goodwill	411	411
Regulatory assets	1,578	1,582
Other assets	646	664
Total investments and other assets	3,169	3,206
TOTAL ASSETS	23,459	22,676
Current Liabilities:
Current maturities of long-term debt	395	120
Short-term Debt	783	714
Accounts and wages payable	525	711
Taxes accrued	160	46
Interest accrued	103	85
Current regulatory liabilities	89	106
Other current liabilities	404	434
Liabilities of discontinued operations (Note 12)	30	33
Total current liabilities	2,489	2,249
Long-term Debt, Net	5,981	6,120
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes, net	4,084	3,923
Accumulated deferred investment tax credits	62	64
Regulatory liabilities	1,894	1,850
Asset retirement obligations	597	396
Pension and other postretirement benefits	666	705
Other deferred credits and liabilities	530	514
Total deferred credits and other liabilities	$ 7,833	$ 7,452
Commitments and Contingencies
Stockholders' Equity:
Common Stock	$ 2	$ 2
Other paid-in capital	5,612	5,617
Retained earnings	1,405	1,103
Accumulated other comprehensive income (loss)	(5)	(9)
Stockholder's equity	7,014	6,713
Noncontrolling Interest	142	142
Total equity	7,156	6,855
TOTAL LIABILITIES AND EQUITY	23,459	22,676
Union Electric Company
Current Assets:
Cash and cash equivalents	69	1
Advances to money pool	250	0
Accounts receivable - trade (less allowance for doubtful accounts)	260	190
Accounts receivable - affiliates	8	65
Unbilled revenue	148	146
Miscellaneous accounts and notes receivable	62	35
Materials and supplies	374	347
Current regulatory assets	97	163
Other current assets	57	92
Total current assets	1,325	1,039
Property and Plant, Net	11,041	10,867
Investments and Other Assets:
Nuclear decommissioning trust fund	534	549
Regulatory assets	646	695
Other assets	395	391
Total investments and other assets	1,575	1,635
TOTAL ASSETS	13,941	13,541
Current Liabilities:
Current maturities of long-term debt	266	120
Short-term Debt	0	97
Accounts and wages payable	187	405
Accounts payable - affiliates	35	56
Taxes accrued	273	32
Interest accrued	66	58
Current regulatory liabilities	41	18
Other current liabilities	116	117
Total current liabilities	984	903
Long-term Debt, Net	3,869	3,879
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes, net	2,858	2,806
Accumulated deferred investment tax credits	59	61
Regulatory liabilities	1,166	1,147
Asset retirement obligations	590	389
Pension and other postretirement benefits	267	274
Other deferred credits and liabilities	30	30
Total deferred credits and other liabilities	$ 4,970	$ 4,707
Commitments and Contingencies
Stockholders' Equity:
Common Stock	$ 511	$ 511
Other paid-in capital	1,784	1,569
Preferred stock	80	80
Retained earnings	1,743	1,892
Stockholder's equity	4,118	4,052
TOTAL LIABILITIES AND EQUITY	13,941	13,541
Ameren Illinois Company
Current Assets:
Cash and cash equivalents	0	1
Accounts receivable - trade (less allowance for doubtful accounts)	229	212
Accounts receivable - affiliates	1	22
Unbilled revenue	86	119
Miscellaneous accounts and notes receivable	11	9
Materials and supplies	174	177
Current regulatory assets	65	129
Current accumulated deferred income taxes, net	50	160
Other current assets	16	15
Total current assets	632	844
Property and Plant, Net	6,615	6,165
Investments and Other Assets:
Goodwill	411	411
Regulatory assets	922	883
Other assets	76	78
Total investments and other assets	1,409	1,372
TOTAL ASSETS	8,656	8,381
Current Liabilities:
Current maturities of long-term debt	129	0
Short-term Debt	0	32
Borrowings from money pool	122	15
Accounts and wages payable	251	207
Accounts payable - affiliates	36	50
Taxes accrued	7	17
Interest accrued	39	24
Customer deposits	70	77
Mark-to-market derivative liabilities	38	42
Current environmental remediation	35	52
Current regulatory liabilities	37	84
Other current liabilities	90	100
Total current liabilities	854	700
Long-term Debt, Net	2,112	2,241
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes, net	1,412	1,408
Regulatory liabilities	728	703
Pension and other postretirement benefits	282	277
Environmental remediation	203	199
Other deferred credits and liabilities	224	192
Total deferred credits and other liabilities	$ 2,849	$ 2,779
Commitments and Contingencies
Stockholders' Equity:
Common Stock	$ 0	$ 0
Other paid-in capital	1,980	1,980
Preferred stock	62	62
Retained earnings	793	611
Accumulated other comprehensive income (loss)	6	8
Stockholder's equity	2,841	2,661
TOTAL LIABILITIES AND EQUITY	$ 8,656	$ 8,381