Consolidated Balance Sheet - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 8	$ 16
Accounts receivable - trade (less allowance for doubtful accounts)	486	393
Unbilled revenue	323	278
Miscellaneous accounts receivable	76	63
Inventories	514	494
Current regulatory assets	82	69
Other current assets	131	118
Total current assets	1,620	1,431
Property, Plant, and Equipment, Net	25,081	24,376
Investments and Other Assets:
Nuclear decommissioning trust fund	854	847
Goodwill	411	411
Regulatory assets	1,133	992
Other assets	917	876
Total investments and other assets	3,315	3,126
TOTAL ASSETS	30,016	28,933
Current Liabilities:
Current maturities of long-term debt	357	442
Short-term debt	120	440
Accounts and wages payable	616	874
Taxes accrued	142	37
Interest accrued	118	94
Customer deposits	126	111
Current regulatory liabilities	147	164
Other current liabilities	374	343
Total current liabilities	2,000	2,505
Long-term Debt, Net	10,171	8,915
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes and investment tax credits, net	3,034	2,919
Regulatory liabilities	4,933	4,887
Asset retirement obligations	639	638
Pension and other postretirement benefits	414	401
Other deferred credits and liabilities	456	467
Total deferred credits and other liabilities	9,476	9,312
Commitments and Contingencies
Shareholders’ Equity:
Common Stock	2	2
Other paid-in capital, principally premium on common stock	5,716	5,694
Retained earnings	2,525	2,380
Accumulated other comprehensive income (loss)	(16)	(17)
Total shareholders’ equity	8,227	8,059
Noncontrolling Interests	142	142
Total equity	8,369	8,201
TOTAL LIABILITIES AND EQUITY	30,016	28,933
Accounts Receivable, Allowance for Credit Loss, Current	$ 25	$ 17
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	400,000,000.0	400,000,000.0
Common Stock, Shares, Outstanding	247,100,000	246,200,000
Union Electric Company
Current Assets:
Cash and cash equivalents	$ 0	$ 9
Accounts receivable - trade (less allowance for doubtful accounts)	216	164
Accounts receivable – affiliates	16	30
Unbilled revenue	213	139
Miscellaneous accounts receivable	51	33
Inventories	406	373
Other current assets	91	66
Total current assets	993	814
Property, Plant, and Equipment, Net	12,844	12,635
Investments and Other Assets:
Nuclear decommissioning trust fund	854	847
Regulatory assets	304	285
Other assets	352	356
Total investments and other assets	1,510	1,488
TOTAL ASSETS	15,347	14,937
Current Liabilities:
Current maturities of long-term debt	7	92
Short-term debt	79	234
Borrowings from money pool	65	0
Accounts and wages payable	246	465
Accounts payable – affiliates	69	52
Taxes accrued	121	24
Interest accrued	63	48
Current asset retirement obligations	53	53
Current regulatory liabilities	64	62
Other current liabilities	120	96
Total current liabilities	887	1,126
Long-term Debt, Net	4,560	4,098
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes and investment tax credits, net	1,673	1,612
Regulatory liabilities	2,922	2,937
Asset retirement obligations	635	634
Pension and other postretirement benefits	141	141
Other deferred credits and liabilities	38	40
Total deferred credits and other liabilities	5,409	5,364
Commitments and Contingencies
Shareholders’ Equity:
Common Stock	511	511
Other paid-in capital, principally premium on common stock	2,027	2,027
Preferred stock	80	80
Retained earnings	1,873	1,731
Total shareholders’ equity	4,491	4,349
TOTAL LIABILITIES AND EQUITY	15,347	14,937
Accounts Receivable, Allowance for Credit Loss, Current	$ 9	$ 7
Common stock, par value (in dollars per share)	$ 5,000,000	$ 5,000,000
Common stock, shares authorized (in shares)	150,000,000.0	150,000,000.0
Common Stock, Shares, Outstanding	102,100,000	102,100,000
Ameren Illinois Company
Current Assets:
Cash and cash equivalents	$ 2	$ 0
Accounts receivable - trade (less allowance for doubtful accounts)	256	215
Accounts receivable – affiliates	22	28
Unbilled revenue	110	139
Miscellaneous accounts receivable	21	25
Inventories	108	121
Current regulatory assets	50	57
Other current assets	35	29
Total current assets	604	614
Property, Plant, and Equipment, Net	10,559	10,083
Investments and Other Assets:
Goodwill	411	411
Regulatory assets	809	694
Other assets	419	383
Total investments and other assets	1,639	1,488
TOTAL ASSETS	12,802	12,185
Current Liabilities:
Short-term debt	41	53
Accounts and wages payable	293	299
Accounts payable – affiliates	41	82
Customer deposits	94	77
Current environmental remediation	48	42
Current regulatory liabilities	70	84
Other current liabilities	209	207
Total current liabilities	796	844
Long-term Debt, Net	3,576	3,575
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes and investment tax credits, net	1,277	1,224
Regulatory liabilities	1,906	1,849
Pension and other postretirement benefits	225	214
Environmental remediation	73	87
Other deferred credits and liabilities	264	260
Total deferred credits and other liabilities	3,745	3,634
Commitments and Contingencies
Shareholders’ Equity:
Common Stock	0	0
Other paid-in capital, principally premium on common stock	2,538	2,188
Preferred stock	62	62
Retained earnings	2,085	1,882
Total shareholders’ equity	4,685	4,132
TOTAL LIABILITIES AND EQUITY	12,802	12,185
Accounts Receivable, Allowance for Credit Loss, Current	$ 16	$ 10
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	45,000,000.0	45,000,000.0
Common Stock, Shares, Outstanding	25,500,000	25,500,000