Consolidated Balance Sheet - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 139	$ 16
Accounts receivable - trade (less allowance for doubtful accounts)	415	393
Unbilled revenue	269	278
Miscellaneous accounts receivable	65	63
Inventories	521	494
Current regulatory assets	109	69
Other current assets	135	118
Total current assets	1,653	1,431
Property, Plant, and Equipment, Net	26,807	24,376
Investments and Other Assets:
Nuclear decommissioning trust fund	982	847
Goodwill	411	411
Regulatory assets	1,100	992
Other assets	1,077	876
Total investments and other assets	3,570	3,126
TOTAL ASSETS	32,030	28,933
Current Liabilities:
Current maturities of long-term debt	8	442
Short-term debt	490	440
Accounts and wages payable	958	874
Interest accrued	114	94
Current Asset Retirement Obligation	60	53
Current regulatory liabilities	121	164
Other current liabilities	489	491
Total current liabilities	2,180	2,505
Long-term Debt, Net	11,078	8,915
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes and investment tax credits, net	3,211	2,919
Regulatory liabilities	5,282	4,887
Asset retirement obligations	696	638
Pension and other postretirement benefits	37	401
Other deferred credits and liabilities	466	467
Total deferred credits and other liabilities	9,692	9,312
Commitments and Contingencies (Notes 2, 9, and 14)
Shareholders' Equity:
Common stock	3	2
Other paid-in capital, principally premium on common stock	6,179	5,694
Retained earnings	2,757	2,380
Accumulated other comprehensive loss	(1)	(17)
Total shareholders' equity	8,938	8,059
Noncontrolling Interests	142	142
Total equity	9,080	8,201
TOTAL LIABILITIES AND EQUITY	32,030	28,933
Union Electric Company
Current Assets:
Cash and cash equivalents	136	9
Advances to money pool	139	0
Accounts receivable - trade (less allowance for doubtful accounts)	166	164
Accounts receivable – affiliates	57	30
Unbilled revenue	133	139
Miscellaneous accounts receivable	36	33
Inventories	386	373
Current regulatory assets	60	8
Other current assets	79	58
Total current assets	1,192	814
Property, Plant, and Equipment, Net	13,879	12,635
Investments and Other Assets:
Nuclear decommissioning trust fund	982	847
Regulatory assets	347	285
Other assets	383	356
Total investments and other assets	1,712	1,488
TOTAL ASSETS	16,783	14,937
Current Liabilities:
Current maturities of long-term debt	8	92
Short-term debt	0	234
Accounts and wages payable	501	465
Accounts payable – affiliates	46	52
Taxes Accrued	42	24
Interest accrued	53	48
Current Asset Retirement Obligation	60	53
Current regulatory liabilities	26	62
Other current liabilities	97	96
Total current liabilities	833	1,126
Long-term Debt, Net	5,096	4,098
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes and investment tax credits, net	1,742	1,612
Regulatory liabilities	3,110	2,937
Asset retirement obligations	691	634
Pension and other postretirement benefits	35	141
Other deferred credits and liabilities	66	40
Total deferred credits and other liabilities	5,644	5,364
Commitments and Contingencies (Notes 2, 9, and 14)
Shareholders' Equity:
Common stock	511	511
Other paid-in capital, principally premium on common stock	2,518	2,027
Preferred stock	80	80
Retained earnings	2,101	1,731
Total shareholders' equity	5,210	4,349
TOTAL LIABILITIES AND EQUITY	16,783	14,937
Ameren Illinois Company
Current Assets:
Cash and cash equivalents	0	0
Accounts receivable - trade (less allowance for doubtful accounts)	234	215
Accounts receivable – affiliates	64	28
Unbilled revenue	136	139
Miscellaneous accounts receivable	12	25
Inventories	135	121
Current regulatory assets	37	57
Other current assets	29	29
Total current assets	647	614
Property, Plant, and Equipment, Net	11,201	10,083
Investments and Other Assets:
Goodwill	411	411
Regulatory assets	742	694
Other assets	534	383
Total investments and other assets	1,687	1,488
TOTAL ASSETS	13,535	12,185
Current Liabilities:
Short-term debt	0	53
Accounts and wages payable	363	299
Accounts payable – affiliates	51	82
Customer deposits	74	77
Current regulatory liabilities	88	84
Other current liabilities	221	249
Total current liabilities	816	844
Long-term Debt, Net	3,946	3,575
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes and investment tax credits, net	1,367	1,224
Regulatory liabilities	2,063	1,849
Pension and other postretirement benefits	69	214
Environmental remediation	57	87
Other deferred credits and liabilities	251	260
Total deferred credits and other liabilities	3,807	3,634
Commitments and Contingencies (Notes 2, 9, and 14)
Shareholders' Equity:
Common stock	0	0
Other paid-in capital, principally premium on common stock	2,652	2,188
Preferred stock	62	62
Retained earnings	2,252	1,882
Total shareholders' equity	4,966	4,132
TOTAL LIABILITIES AND EQUITY	$ 13,535	$ 12,185