Consolidated Balance Sheet - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Current Assets:
Cash and cash equivalents	$ 23	$ 7
Accounts receivable - trade (less allowance for doubtful accounts)	667	525
Unbilled revenue	253	346
Miscellaneous accounts receivable	327	96
Inventories	669	762
Current regulatory assets	340	366
Other current assets	176	162
Total current assets	2,455	2,264
Property, Plant, and Equipment, Net	37,010	36,304
Investments and Other Assets:
Nuclear decommissioning trust fund	1,312	1,342
Goodwill	411	411
Regulatory Asset	2,569	2,397
Pension and other postretirement benefits	765	757
Other assets	1,143	1,123
Total investments and other assets	6,200	6,030
TOTAL ASSETS	45,665	44,598
Current Liabilities:
Current maturities of long-term debt	17	317
Short-term debt	1,252	1,143
Accounts and wages payable	702	1,059
Interest accrued	159	196
Customer deposits	223	223
Other current liabilities	510	475
Total current liabilities	2,863	3,413
Long-term debt, net	18,354	17,262
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes and tax credits, net	4,782	4,474
Regulatory liabilities	5,953	5,897
Asset retirement obligations	830	822
Other deferred credits and liabilities	535	487
Total deferred credits and other liabilities	12,100	11,680
Commitments and Contingencies
Shareholders’ Equity:
Common Stock	3	3
Other paid-in capital, principally premium on common stock	7,524	7,513
Retained earnings	4,702	4,604
Accumulated other comprehensive loss	(10)	(6)
Total shareholders’ equity	12,219	12,114
Noncontrolling Interests	129	129
Total equity	12,348	12,243
TOTAL LIABILITIES AND EQUITY	45,665	44,598
Variable Interest Entity, Primary Beneficiary
Investments and Other Assets:
Regulatory Asset	459	465
Current Liabilities:
Current maturities of long-term debt	17	17
Long-term debt, net	449	448
Union Electric Company
Current Assets:
Cash and cash equivalents	7	0
Advances to money pool	0	43
Unbilled revenue	128	170
Miscellaneous accounts receivable	272	33
Inventories	472	514
Current regulatory assets	119	66
Other current assets	85	70
Total current assets	1,363	1,145
Property, Plant, and Equipment, Net	19,228	18,788
Investments and Other Assets:
Nuclear decommissioning trust fund	1,312	1,342
Regulatory Asset	1,401	1,366
Pension and other postretirement benefits	212	211
Other assets	239	254
Total investments and other assets	3,164	3,173
TOTAL ASSETS	23,755	23,106
Current Liabilities:
Current maturities of long-term debt	17	17
Short-term debt	629	0
Taxes accrued	77	29
Interest accrued	70	88
Other current liabilities	199	206
Total current liabilities	1,369	1,019
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes and tax credits, net	2,488	2,217
Regulatory liabilities	3,177	3,176
Asset retirement obligations	826	818
Other deferred credits and liabilities	176	150
Total deferred credits and other liabilities	6,667	6,361
Commitments and Contingencies
Shareholders’ Equity:
Common Stock	511	511
Other paid-in capital, principally premium on common stock	3,201	3,201
Preferred stock	80	80
Retained earnings	4,198	4,206
Total shareholders’ equity	7,990	7,998
TOTAL LIABILITIES AND EQUITY	23,755	23,106
Union Electric Company | Variable Interest Entity, Primary Beneficiary
Investments and Other Assets:
Regulatory Asset	459	465
Current Liabilities:
Current maturities of long-term debt	17	17
Long-term debt, net	449	448
Union Electric Company | Nonrelated Party
Current Assets:
Accounts receivable - trade (less allowance for doubtful accounts)	236	209
Current Liabilities:
Accounts and wages payable	335	629
Long-term debt, net	7,672	7,671
Union Electric Company | Related Party
Current Assets:
Accounts receivable - trade (less allowance for doubtful accounts)	44	40
Current Liabilities:
Accounts and wages payable	42	50
Long-term debt, net	57	57
Ameren Illinois Company
Current Assets:
Cash and cash equivalents	4	0
Unbilled revenue	125	175
Miscellaneous accounts receivable	21	28
Inventories	193	244
Prepaid assets	54	59
Current regulatory assets	208	281
Other current assets	16	8
Total current assets	1,058	1,110
Property, Plant, and Equipment, Net	15,772	15,530
Investments and Other Assets:
Goodwill	411	411
Regulatory Asset	1,143	1,011
Pension and other postretirement benefits	478	471
Other assets	731	697
Total investments and other assets	2,763	2,590
TOTAL ASSETS	19,593	19,230
Current Liabilities:
Current maturities of long-term debt	0	300
Short-term debt	189	88
Borrowings from money pool	0	37
Interest accrued	57	59
Customer deposits	187	185
Current regulatory liabilities	89	79
Other current liabilities	159	172
Total current liabilities	1,045	1,318
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes and tax credits, net	2,193	2,143
Regulatory liabilities	2,625	2,573
Other deferred credits and liabilities	298	273
Total deferred credits and other liabilities	5,116	4,989
Commitments and Contingencies
Shareholders’ Equity:
Common Stock	0	0
Other paid-in capital, principally premium on common stock	3,056	3,056
Preferred stock	49	49
Retained earnings	4,427	4,266
Total shareholders’ equity	7,532	7,371
TOTAL LIABILITIES AND EQUITY	19,593	19,230
Ameren Illinois Company | Nonrelated Party
Current Assets:
Accounts receivable - trade (less allowance for doubtful accounts)	415	300
Current Liabilities:
Accounts and wages payable	293	324
Long-term debt, net	5,897	5,549
Ameren Illinois Company | Related Party
Current Assets:
Accounts receivable - trade (less allowance for doubtful accounts)	22	15
Current Liabilities:
Accounts and wages payable	71	74
Long-term debt, net	$ 3	$ 3