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Consolidated Balance Sheet - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Current Assets:    
Cash and cash equivalents $ 9 $ 7
Accounts receivable - trade (less allowance for doubtful accounts) 794 525
Unbilled revenue 413 346
Miscellaneous accounts receivable 78 96
Inventories 804 762
Current regulatory assets 260 366
Other current assets 252 162
Total current assets 2,610 2,264
Property, Plant, and Equipment, Net 38,411 36,304
Investments and Other Assets:    
Nuclear decommissioning trust fund 1,502 1,342
Goodwill 411 411
Regulatory Asset 2,611 2,397
Pension and other postretirement benefits 741 757
Other assets 1,130 1,123
Total investments and other assets 6,395 6,030
TOTAL ASSETS 47,416 44,598
Current Liabilities:    
Current maturities of long-term debt 29 317
Short-term debt 903 1,143
Accounts and wages payable 762 1,059
Taxes accrued 215 60
Interest accrued 183 196
Customer deposits 248 223
Current regulatory liabilities 142 120
Other current liabilities 323 295
Total current liabilities 2,805 3,413
Long-term debt, net 19,172 17,262
Deferred Credits and Other Liabilities:    
Accumulated deferred income taxes and tax credits, net 5,081 4,474
Regulatory liabilities 6,089 5,897
Asset retirement obligations 844 822
Other deferred credits and liabilities 516 487
Total deferred credits and other liabilities 12,530 11,680
Commitments and Contingencies
Shareholders’ Equity:    
Common Stock 3 3
Other paid-in capital, principally premium on common stock 7,559 7,513
Retained earnings 5,232 4,604
Accumulated other comprehensive loss (14) (6)
Total shareholders’ equity 12,780 12,114
Noncontrolling Interests 129 129
Total equity 12,909 12,243
TOTAL LIABILITIES AND EQUITY 47,416 44,598
Variable Interest Entity, Primary Beneficiary    
Current Assets:    
Other current assets 46 2
Investments and Other Assets:    
Regulatory Asset 449 465
Current Liabilities:    
Current maturities of long-term debt 29 17
Long-term debt, net 437 448
Union Electric Company    
Current Assets:    
Cash and cash equivalents 0 0
Restricted Cash 86 7
Advances to money pool 0 43
Unbilled revenue 267 170
Miscellaneous accounts receivable 9 33
Inventories 511 514
Current regulatory assets 149 66
Other current assets 70 63
Total current assets 1,475 1,145
Property, Plant, and Equipment, Net 20,083 18,788
Investments and Other Assets:    
Nuclear decommissioning trust fund 1,502 1,342
Regulatory Asset 1,454 1,366
Pension and other postretirement benefits 202 211
Other assets 235 254
Total investments and other assets 3,393 3,173
TOTAL ASSETS 24,951 23,106
Current Liabilities:    
Current maturities of long-term debt 29 17
Short-term debt 259 0
Borrowings from money pool 51 0
Taxes accrued 192 29
Interest accrued 94 88
Other current liabilities 204 206
Total current liabilities 1,264 1,019
Deferred Credits and Other Liabilities:    
Accumulated deferred income taxes and tax credits, net 2,622 2,217
Regulatory liabilities 3,260 3,176
Asset retirement obligations 839 818
Other deferred credits and liabilities 166 150
Total deferred credits and other liabilities 6,887 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 4,791 4,206
Total shareholders’ equity 8,583 7,998
TOTAL LIABILITIES AND EQUITY 24,951 23,106
Union Electric Company | Variable Interest Entity, Primary Beneficiary    
Current Assets:    
Restricted Cash 46 2
Investments and Other Assets:    
Regulatory Asset 449 465
Current Liabilities:    
Current maturities of long-term debt 29 17
Long-term debt, net 437 448
Union Electric Company | Nonrelated Party    
Current Assets:    
Accounts receivable - trade (less allowance for doubtful accounts) 359 209
Current Liabilities:    
Accounts and wages payable 355 629
Long-term debt, net 8,130 7,671
Union Electric Company | Related Party    
Current Assets:    
Accounts receivable - trade (less allowance for doubtful accounts) 24 40
Current Liabilities:    
Accounts and wages payable 80 50
Long-term debt, net 87 57
Ameren Illinois Company    
Current Assets:    
Cash and cash equivalents 0 0
Advances to money pool 51 0
Unbilled revenue 146 175
Miscellaneous accounts receivable 36 28
Inventories 289 244
Prepaid assets 65 59
Current regulatory assets 106 281
Other current assets 8 8
Total current assets 1,141 1,110
Property, Plant, and Equipment, Net 16,274 15,530
Investments and Other Assets:    
Goodwill 411 411
Regulatory Asset 1,124 1,011
Pension and other postretirement benefits 492 471
Other assets 756 697
Total investments and other assets 2,783 2,590
TOTAL ASSETS 20,198 19,230
Current Liabilities:    
Current maturities of long-term debt 0 300
Short-term debt 0 88
Borrowings from money pool 0 37
Interest accrued 59 59
Customer deposits 212 185
Purchase of receivables liabilities 55 43
Current regulatory liabilities 101 79
Other current liabilities 128 129
Total current liabilities 975 1,318
Deferred Credits and Other Liabilities:    
Accumulated deferred income taxes and tax credits, net 2,245 2,143
Regulatory liabilities 2,705 2,573
Other deferred credits and liabilities 308 273
Total deferred credits and other liabilities 5,258 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 4,602 4,266
Total shareholders’ equity 7,707 7,371
TOTAL LIABILITIES AND EQUITY 20,198 19,230
Ameren Illinois Company | Nonrelated Party    
Current Assets:    
Accounts receivable - trade (less allowance for doubtful accounts) 419 300
Current Liabilities:    
Accounts and wages payable 314 324
Long-term debt, net 6,253 5,549
Ameren Illinois Company | Related Party    
Current Assets:    
Accounts receivable - trade (less allowance for doubtful accounts) 21 15
Current Liabilities:    
Accounts and wages payable 106 74
Long-term debt, net $ 5 $ 3