Consolidated Balance Sheet - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 9	$ 9
Accounts receivable - trade (less allowance for doubtful accounts)	507	437
Unbilled revenue	262	295
Miscellaneous accounts and notes receivable	85	63
Inventories	547	527
Current regulatory assets	75	149
Other current assets	96	113
Total current assets	1,581	1,593
Property, Plant, and Equipment, Net	20,906	20,113
Investments and Other Assets:
Nuclear decommissioning trust fund	672	607
Goodwill	411	411
Regulatory assets	1,509	1,437
Other assets	538	538
Total investments and other assets	3,130	2,993
TOTAL ASSETS	25,617	24,699
Current Liabilities:
Current maturities of long-term debt	777	681
Short-term Debt	446	558
Accounts and wages payable	548	805
Taxes accrued	159	46
Interest accrued	106	93
Customer deposits	108	107
Current regulatory liabilities	119	110
Other current liabilities	318	274
Total current liabilities	2,581	2,674
Long-term Debt, Net	6,922	6,595
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes, net	4,721	4,264
Accumulated deferred investment tax credits	50	55
Regulatory liabilities	2,045	1,985
Asset retirement obligations	631	635
Pension and other postretirement benefits	711	769
Other deferred credits and liabilities	469	477
Total deferred credits and other liabilities	8,627	8,185
Commitments and Contingencies
Stockholders' Equity:
Common Stock	2	2
Other paid-in capital	5,534	5,556
Retained earnings	1,830	1,568
Accumulated other comprehensive loss	(21)	(23)
Stockholder's equity	7,345	7,103
Noncontrolling Interest	142	142
Total equity	7,487	7,245
TOTAL LIABILITIES AND EQUITY	25,617	24,699
Union Electric Company
Current Assets:
Cash and cash equivalents	0	0
Advances to money pool	18	161
Accounts receivable - trade (less allowance for doubtful accounts)	274	187
Accounts receivable - affiliates	14	12
Unbilled revenue	151	154
Miscellaneous accounts and notes receivable	45	14
Inventories	396	392
Current regulatory assets	23	35
Other current assets	43	49
Total current assets	964	1,004
Property, Plant, and Equipment, Net	11,538	11,478
Investments and Other Assets:
Nuclear decommissioning trust fund	672	607
Regulatory assets	576	619
Other assets	318	327
Total investments and other assets	1,566	1,553
TOTAL ASSETS	14,068	14,035
Current Liabilities:
Current maturities of long-term debt	383	431
Short-term Debt	0	0
Accounts and wages payable	226	444
Accounts payable - affiliates	102	68
Taxes accrued	148	30
Interest accrued	61	54
Current regulatory liabilities	18	12
Other current liabilities	118	123
Total current liabilities	1,056	1,162
Long-term Debt, Net	3,584	3,563
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes, net	3,073	3,013
Accumulated deferred investment tax credits	49	53
Regulatory liabilities	1,275	1,215
Asset retirement obligations	627	629
Pension and other postretirement benefits	274	291
Other deferred credits and liabilities	13	19
Total deferred credits and other liabilities	5,311	5,220
Commitments and Contingencies
Stockholders' Equity:
Common Stock	511	511
Other paid-in capital	1,828	1,828
Preferred stock	80	80
Retained earnings	1,698	1,671
Stockholder's equity	4,117	4,090
TOTAL LIABILITIES AND EQUITY	14,068	14,035
Ameren Illinois Company
Current Assets:
Cash and cash equivalents	0	0
Accounts receivable - trade (less allowance for doubtful accounts)	219	242
Accounts receivable - affiliates	21	10
Unbilled revenue	111	141
Miscellaneous accounts and notes receivable	31	22
Inventories	151	135
Current regulatory assets	51	108
Other current assets	18	25
Total current assets	602	683
Property, Plant, and Equipment, Net	7,987	7,469
Investments and Other Assets:
Goodwill	411	411
Regulatory assets	921	816
Other assets	101	95
Total investments and other assets	1,433	1,322
TOTAL ASSETS	10,022	9,474
Current Liabilities:
Current maturities of long-term debt	394	250
Short-term Debt	169	51
Borrowings from money pool	11	0
Accounts and wages payable	247	264
Accounts payable - affiliates	50	63
Taxes accrued	8	16
Interest accrued	37	33
Customer deposits	69	69
Current environmental remediation	43	38
Current regulatory liabilities	85	78
Other current liabilities	153	109
Total current liabilities	1,266	971
Long-term Debt, Net	2,196	2,338
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes, net	1,874	1,631
Accumulated deferred investment tax credits	1	2
Regulatory liabilities	766	768
Pension and other postretirement benefits	322	346
Environmental remediation	143	162
Other deferred credits and liabilities	229	222
Total deferred credits and other liabilities	3,335	3,131
Commitments and Contingencies
Stockholders' Equity:
Common Stock	0	0
Other paid-in capital	2,005	2,005
Preferred stock	62	62
Retained earnings	1,158	967
Stockholder's equity	3,225	3,034
TOTAL LIABILITIES AND EQUITY	$ 10,022	$ 9,474