Consolidated Balance Sheet - UE - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Current Assets:
Cash and cash equivalents	$ 7	$ 25
Accounts receivable - trade (less allowance for doubtful accounts)	525	494
Unbilled revenue	346	319
Inventories	762	733
Current regulatory assets	366	365
Other current assets	162	139
Total current assets	2,264	2,181
Property, Plant, and Equipment, Net	36,304	33,776
Investments and Other Assets:
Nuclear decommissioning trust fund	1,342	1,150
Regulatory Asset, Noncurrent	2,397	1,810
Pension and other postretirement benefits	757	581
Other assets	1,123	921
Total investments and other assets	6,030	4,873
TOTAL ASSETS	44,598	40,830
Current Liabilities:
Long-Term Debt, Current Maturities	317	849
Short-term debt	1,143	536
Accounts and wages payable	1,059	1,136
Interest accrued	196	147
Other current liabilities	475	501
Total current liabilities	3,413	3,345
Long-Term Debt, Excluding Current Maturities	17,262	15,121
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes and production and investment tax credits, net	4,474	4,176
Regulatory liabilities	5,897	5,512
Asset retirement obligations	822	772
Other deferred credits and liabilities	487	426
Total deferred credits and other liabilities	11,680	10,886
Commitments and Contingencies (Notes 2, 9, and 14)
Shareholders' Equity:
Common stock	3	3
Other paid-in capital, principally premium on common stock	7,513	7,216
Retained earnings	4,604	4,136
Total shareholders' equity	12,114	11,349
TOTAL LIABILITIES AND EQUITY	44,598	40,830
Ameren Missouri
Current Assets:
Cash and cash equivalents	0	0
Advances to money pool	43	0
Unbilled revenue	170	163
Inventories	514	508
Current regulatory assets	66	101
Other current assets	70	68
Total current assets	1,145	1,142
Property, Plant, and Equipment, Net	18,788	17,250
Investments and Other Assets:
Nuclear decommissioning trust fund	1,342	1,150
Regulatory Asset, Noncurrent	1,366	755
Pension and other postretirement benefits	211	157
Other assets	254	152
Total investments and other assets	3,173	2,214
TOTAL ASSETS	23,106	20,606
Current Liabilities:
Long-Term Debt, Current Maturities	17	350
Short-term debt	0	170
Interest accrued	88	69
Other current liabilities	235	181
Total current liabilities	1,019	1,747
Long-Term Debt, Excluding Current Maturities	7,671	5,991
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes and production and investment tax credits, net	2,217	2,122
Regulatory liabilities	3,176	2,959
Asset retirement obligations	818	768
Other deferred credits and liabilities	150	56
Total deferred credits and other liabilities	6,361	5,905
Commitments and Contingencies (Notes 2, 9, and 14)
Shareholders' Equity:
Common stock	511	511
Other paid-in capital, principally premium on common stock	3,201	2,725
Preferred stock	80	80
Retained earnings	4,206	3,647
Total shareholders' equity	7,998	6,963
TOTAL LIABILITIES AND EQUITY	23,106	20,606
Ameren Missouri | Nonrelated Party
Current Assets:
Accounts receivable - trade (less allowance for doubtful accounts)	209	204
Current Liabilities:
Short-term debt	0	170
Accounts and wages payable	629	618
Ameren Missouri | Related Party
Current Assets:
Accounts receivable - trade (less allowance for doubtful accounts)	40	72
Current Liabilities:
Short-term debt	0	306
Accounts and wages payable	50	53
Long-Term Debt, Excluding Current Maturities	57	0
Ameren Illinois
Current Assets:
Cash and cash equivalents	0	0
Unbilled revenue	175	156
Inventories	244	225
Current regulatory assets	281	252
Other current assets	8	13
Total current assets	1,110	1,047
Property, Plant, and Equipment, Net	15,530	14,632
Investments and Other Assets:
Regulatory Asset, Noncurrent	1,011	1,035
Pension and other postretirement benefits	471	394
Other assets	697	603
Total investments and other assets	2,590	2,443
TOTAL ASSETS	19,230	18,122
Current Liabilities:
Long-Term Debt, Current Maturities	300	0
Short-term debt	88	366
Other current liabilities	231	298
Total current liabilities	1,318	1,433
Long-Term Debt, Excluding Current Maturities	5,549	5,232
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes and production and investment tax credits, net	2,143	1,906
Regulatory liabilities	2,573	2,418
Other deferred credits and liabilities	273	308
Total deferred credits and other liabilities	4,989	4,632
Commitments and Contingencies (Notes 2, 9, and 14)
Shareholders' Equity:
Common stock	0	0
Other paid-in capital, principally premium on common stock	3,056	3,020
Preferred stock	49	49
Retained earnings	4,266	3,756
Total shareholders' equity	7,371	6,825
TOTAL LIABILITIES AND EQUITY	19,230	18,122
Ameren Illinois | Nonrelated Party
Current Assets:
Accounts receivable - trade (less allowance for doubtful accounts)	300	273
Current Liabilities:
Short-term debt	88	366
Accounts and wages payable	324	370
Ameren Illinois | Related Party
Current Assets:
Accounts receivable - trade (less allowance for doubtful accounts)	15	35
Current Liabilities:
Short-term debt	37	135
Accounts and wages payable	74	52
Long-Term Debt, Excluding Current Maturities	$ 3	$ 0