Consolidated Statement of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash Flows From Operating Activities:
Net income	$ 998	$ 915
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,063	1,016
Amortization of nuclear fuel	56	46
Amortization of debt issuance costs and premium/discounts	12	17
Deferred income taxes and investment tax credits, net	128	137
Allowance for equity funds used during construction	(39)	(31)
Stock-based compensation costs	21	18
Other	12	63
Changes in assets and liabilities:
Receivables	54	(296)
Inventories	(93)	(103)
Accounts and wages payable	(287)	(128)
Taxes accrued	156	147
Regulatory assets and liabilities	15	(17)
Assets, other	(78)	(87)
Liabilities, other	51	19
Pension and other postretirement benefits	(182)	(49)
Counterparty collateral, net	144	(68)
Net cash provided by operating activities	2,031	1,599
Cash Flows From Investing Activities:
Capital expenditures	(2,571)	(2,437)
Nuclear fuel expenditures	(63)	(22)
Purchases of securities – nuclear decommissioning trust fund	(156)	(176)
Sales and maturities of securities – nuclear decommissioning trust fund	136	163
Other	(2)	14
Net cash used in investing activities	(2,656)	(2,458)
Cash Flows From Financing Activities:
Dividends on common stock	(496)	(457)
Dividends paid to noncontrolling interest holders	(4)	(4)
Short-term debt, net	272	675
Maturities of long-term debt	(100)	(450)
Issuances of long-term debt	997	1,118
Issuances of common stock	28	29
Employee payroll taxes related to stock-based compensation	(20)	(16)
Debt issuance costs	(12)	(11)
Other	(10)	0
Net cash provided by financing activities	655	884
Net change in cash, cash equivalents, and restricted cash	30	25
Cash, cash equivalents, and restricted cash at beginning of year	216	155
Cash, cash equivalents, and restricted cash at end of period	246	180
Union Electric Company
Cash Flows From Operating Activities:
Net income	544	550
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	618	603
Amortization of nuclear fuel	56	46
Amortization of debt issuance costs and premium/discounts	5	5
Deferred income taxes and investment tax credits, net	(73)	(17)
Allowance for equity funds used during construction	(20)	(17)
Other	(12)	9
Changes in assets and liabilities:
Receivables	(119)	(160)
Inventories	(78)	(19)
Accounts and wages payable	(206)	(192)
Taxes accrued	222	161
Regulatory assets and liabilities	65	(164)
Assets, other	12	(9)
Liabilities, other	(5)	14
Pension and other postretirement benefits	(67)	(12)
Counterparty collateral, net	89	(72)
Net cash provided by operating activities	1,031	726
Cash Flows From Investing Activities:
Capital expenditures	(1,255)	(1,237)
Nuclear fuel expenditures	(63)	(22)
Purchases of securities – nuclear decommissioning trust fund	(156)	(176)
Sales and maturities of securities – nuclear decommissioning trust fund	136	163
Other	0	17
Net cash used in investing activities	(1,338)	(1,255)
Cash Flows From Financing Activities:
Dividends on preferred stock	(3)	(3)
Short-term debt, net	(172)	13
Issuances of long-term debt	499	524
Debt issuance costs	(7)	(6)
Other	(10)	0
Net cash provided by financing activities	307	528
Net change in cash, cash equivalents, and restricted cash	0	(1)
Cash, cash equivalents, and restricted cash at beginning of year	13	8
Cash, cash equivalents, and restricted cash at end of period	13	7
Ameren Illinois Company
Cash Flows From Operating Activities:
Net income	453	376
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	410	381
Amortization of debt issuance costs and premium/discounts	3	9
Deferred income taxes and investment tax credits, net	123	92
Allowance for equity funds used during construction	(15)	(14)
Other	31	19
Changes in assets and liabilities:
Receivables	164	(138)
Inventories	(15)	(84)
Accounts and wages payable	(77)	62
Taxes accrued	19	54
Regulatory assets and liabilities	(45)	147
Assets, other	(80)	(70)
Liabilities, other	74	25
Pension and other postretirement benefits	(74)	(29)
Counterparty collateral, net	55	5
Net cash provided by operating activities	1,026	835
Cash Flows From Investing Activities:
Capital expenditures	(1,226)	(1,145)
Other	(3)	0
Net cash used in investing activities	(1,229)	(1,145)
Cash Flows From Financing Activities:
Dividends on preferred stock	(1)	(1)
Short-term debt, net	(205)	250
Maturities of long-term debt	(100)	(400)
Issuances of long-term debt	498	499
Capital contributions from parent	50	0
Debt issuance costs	(5)	(5)
Net cash provided by financing activities	237	343
Net change in cash, cash equivalents, and restricted cash	34	33
Cash, cash equivalents, and restricted cash at beginning of year	191	133
Cash, cash equivalents, and restricted cash at end of period	$ 225	$ 166