Consolidated Balance Sheet - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 6	$ 139
Accounts receivable - trade (less allowance for doubtful accounts)	464	415
Unbilled revenue	210	269
Miscellaneous accounts receivable	61	65
Inventories	467	521
Restricted cash	134	17
Current regulatory assets	367	109
Other current assets	114	118
Total current assets	1,823	1,653
Property, Plant, and Equipment, Net	27,307	26,807
Investments and Other Assets:
Nuclear decommissioning trust fund	1,010	982
Goodwill	411	411
Regulatory assets	1,249	1,100
Other assets	989	1,077
Total investments and other assets	3,659	3,570
TOTAL ASSETS	32,789	32,030
Current Liabilities:
Current maturities of long-term debt	8	8
Short-term debt	889	490
Accounts and wages payable	581	958
Taxes accrued	128	82
Interest accrued	84	114
Current regulatory liabilities	225	121
Other current liabilities	392	407
Total current liabilities	2,307	2,180
Long-term Debt, Net	11,527	11,078
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes and tax credits, net	3,253	3,211
Regulatory liabilities	5,230	5,282
Asset retirement obligations	705	696
Pension and other postretirement benefits	38	37
Other deferred credits and liabilities	452	466
Total deferred credits and other liabilities	9,678	9,692
Commitments and Contingencies
Shareholders’ Equity:
Common Stock	3	3
Other paid-in capital, principally premium on common stock	6,295	6,179
Retained earnings	2,850	2,757
Accumulated other comprehensive loss	0	(1)
Total shareholders’ equity	9,148	8,938
Noncontrolling Interests	129	142
Total equity	9,277	9,080
TOTAL LIABILITIES AND EQUITY	32,789	32,030
Union Electric Company
Current Assets:
Cash and cash equivalents	1	136
Advances to money pool	0	139
Accounts receivable - trade (less allowance for doubtful accounts)	156	166
Accounts receivable – affiliates	69	57
Unbilled revenue	109	133
Miscellaneous accounts receivable	43	36
Inventories	362	386
Restricted cash	3	5
Current regulatory assets	141	60
Other current assets	70	79
Total current assets	951	1,192
Property, Plant, and Equipment, Net	14,221	13,879
Investments and Other Assets:
Nuclear decommissioning trust fund	1,010	982
Regulatory assets	413	347
Other assets	375	383
Total investments and other assets	1,798	1,712
TOTAL ASSETS	16,970	16,783
Current Liabilities:
Current maturities of long-term debt	8	8
Short-term debt	204	0
Accounts and wages payable	267	501
Accounts payable – affiliates	40	46
Taxes accrued	85	42
Interest accrued	46	53
Current asset retirement obligations	59	60
Other current liabilities	116	123
Total current liabilities	825	833
Long-term Debt, Net	5,096	5,096
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes and tax credits, net	1,756	1,742
Regulatory liabilities	3,130	3,110
Asset retirement obligations	700	691
Pension and other postretirement benefits	34	35
Other deferred credits and liabilities	59	66
Total deferred credits and other liabilities	5,679	5,644
Commitments and Contingencies
Shareholders’ Equity:
Common Stock	511	511
Other paid-in capital, principally premium on common stock	2,631	2,518
Preferred stock	80	80
Retained earnings	2,148	2,101
Total shareholders’ equity	5,370	5,210
TOTAL LIABILITIES AND EQUITY	16,970	16,783
Ameren Illinois Company
Current Assets:
Cash and cash equivalents	0	0
Accounts receivable - trade (less allowance for doubtful accounts)	293	234
Accounts receivable – affiliates	71	64
Unbilled revenue	101	136
Miscellaneous accounts receivable	5	12
Inventories	105	135
Restricted cash	125	6
Current regulatory assets	217	37
Other current assets	24	23
Total current assets	941	647
Property, Plant, and Equipment, Net	11,358	11,201
Investments and Other Assets:
Goodwill	411	411
Regulatory assets	820	742
Other assets	442	534
Total investments and other assets	1,673	1,687
TOTAL ASSETS	13,972	13,535
Current Liabilities:
Short-term debt	323	0
Borrowings from money pool	0	19
Accounts and wages payable	255	363
Accounts payable – affiliates	43	51
Customer deposits	70	74
Current regulatory liabilities	200	88
Other current liabilities	207	221
Total current liabilities	1,098	816
Long-term Debt, Net	3,947	3,946
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes and tax credits, net	1,430	1,367
Regulatory liabilities	1,988	2,063
Pension and other postretirement benefits	67	69
Environmental remediation	51	57
Other deferred credits and liabilities	249	251
Total deferred credits and other liabilities	3,785	3,807
Commitments and Contingencies
Shareholders’ Equity:
Common Stock	0	0
Other paid-in capital, principally premium on common stock	2,692	2,652
Preferred stock	49	62
Retained earnings	2,401	2,252
Total shareholders’ equity	5,142	4,966
TOTAL LIABILITIES AND EQUITY	$ 13,972	$ 13,535