Consolidated Balance Sheet - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 30	$ 10
Accounts receivable - trade (less allowance for doubtful accounts)	514	445
Unbilled revenue	258	323
Miscellaneous accounts and notes receivable	98	70
Inventories	453	522
Current regulatory assets	130	144
Other current assets	84	98
Total current assets	1,567	1,612
Property, Plant, and Equipment, Net	21,666	21,466
Investments and Other Assets:
Nuclear decommissioning trust fund	698	704
Goodwill	411	411
Regulatory assets	1,205	1,230
Other assets	532	522
Total investments and other assets	2,846	2,867
TOTAL ASSETS	26,079	25,945
Current Liabilities:
Current maturities of long-term debt	1,170	841
Short-term Debt	960	484
Accounts and wages payable	497	902
Taxes accrued	91	52
Interest accrued	97	99
Customer deposits	115	108
Current regulatory liabilities	130	128
Other current liabilities	285	326
Total current liabilities	3,345	2,940
Long-term Debt, Net	6,766	7,094
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes, net	2,564	2,506
Accumulated deferred investment tax credits	47	49
Regulatory liabilities	4,363	4,387
Asset retirement obligations	636	638
Pension and other postretirement benefits	541	545
Other deferred credits and liabilities	445	460
Total deferred credits and other liabilities	8,596	8,585
Commitments and Contingencies
Stockholders' Equity:
Common Stock	2	2
Other paid-in capital	5,546	5,540
Retained earnings	1,699	1,660
Accumulated other comprehensive loss	(17)	(18)
Stockholder's equity	7,230	7,184
Noncontrolling Interest	142	142
Total equity	7,372	7,326
TOTAL LIABILITIES AND EQUITY	26,079	25,945
Union Electric Company
Current Assets:
Cash and cash equivalents	3	0
Accounts receivable - trade (less allowance for doubtful accounts)	205	200
Accounts receivable - affiliates	14	11
Unbilled revenue	134	165
Miscellaneous accounts and notes receivable	54	35
Inventories	383	388
Current regulatory assets	60	56
Other current assets	48	50
Total current assets	901	905
Property, Plant, and Equipment, Net	11,768	11,751
Investments and Other Assets:
Nuclear decommissioning trust fund	698	704
Regulatory assets	380	395
Other assets	293	288
Total investments and other assets	1,371	1,387
TOTAL ASSETS	14,040	14,043
Current Liabilities:
Current maturities of long-term debt	713	384
Short-term Debt	282	39
Accounts and wages payable	203	475
Accounts payable - affiliates	40	60
Taxes accrued	64	30
Interest accrued	48	54
Current regulatory liabilities	46	19
Other current liabilities	99	103
Total current liabilities	1,495	1,164
Long-term Debt, Net	3,249	3,577
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes, net	1,680	1,650
Accumulated deferred investment tax credits	46	48
Regulatory liabilities	2,644	2,664
Asset retirement obligations	632	634
Pension and other postretirement benefits	212	213
Other deferred credits and liabilities	13	12
Total deferred credits and other liabilities	5,227	5,221
Commitments and Contingencies
Stockholders' Equity:
Common Stock	511	511
Other paid-in capital	1,858	1,858
Preferred stock	80	80
Retained earnings	1,620	1,632
Stockholder's equity	4,069	4,081
TOTAL LIABILITIES AND EQUITY	14,040	14,043
Ameren Illinois Company
Current Assets:
Cash and cash equivalents	3	0
Accounts receivable - trade (less allowance for doubtful accounts)	298	234
Accounts receivable - affiliates	11	9
Unbilled revenue	124	158
Miscellaneous accounts and notes receivable	39	35
Inventories	70	134
Current regulatory assets	69	87
Other current assets	12	15
Total current assets	626	672
Property, Plant, and Equipment, Net	8,463	8,293
Investments and Other Assets:
Goodwill	411	411
Regulatory assets	812	822
Other assets	159	147
Total investments and other assets	1,382	1,380
TOTAL ASSETS	10,471	10,345
Current Liabilities:
Current maturities of long-term debt	457	457
Short-term Debt	224	62
Accounts and wages payable	243	337
Accounts payable - affiliates	59	70
Taxes accrued	18	19
Interest accrued	42	33
Customer deposits	77	69
Current environmental remediation	47	42
Current regulatory liabilities	67	92
Other current liabilities	141	177
Total current liabilities	1,375	1,358
Long-term Debt, Net	2,373	2,373
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes, net	1,035	1,021
Accumulated deferred investment tax credits	1	1
Regulatory liabilities	1,625	1,629
Pension and other postretirement benefits	285	285
Environmental remediation	122	134
Other deferred credits and liabilities	230	234
Total deferred credits and other liabilities	3,298	3,304
Commitments and Contingencies
Stockholders' Equity:
Common Stock	0	0
Other paid-in capital	2,033	2,013
Preferred stock	62	62
Retained earnings	1,330	1,235
Stockholder's equity	3,425	3,310
TOTAL LIABILITIES AND EQUITY	$ 10,471	$ 10,345