Consolidated Statement of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash Flows From Operating Activities:
Net income	$ 979	$ 998
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,142	1,063
Amortization of nuclear fuel	59	56
Amortization of debt issuance costs and premium/discounts	14	12
Deferred income taxes and investment tax credits, net	145	128
Allowance for equity funds used during construction	(48)	(39)
Stock-based compensation costs	22	21
Other	84	12
Changes in assets and liabilities:
Receivables	(183)	54
Inventories	(60)	(93)
Accounts and wages payable	(239)	(287)
Taxes accrued	176	156
Regulatory assets and liabilities	86	15
Assets, other	(53)	(78)
Liabilities, other	(11)	51
Pension and other postretirement benefits	(168)	(182)
Counterparty collateral, net	1	144
Net cash provided by operating activities	1,946	2,031
Cash Flows From Investing Activities:
Capital expenditures	(3,029)	(2,571)
Nuclear fuel expenditures	(57)	(63)
Purchases of securities – nuclear decommissioning trust fund	(499)	(156)
Sales and maturities of securities – nuclear decommissioning trust fund	480	136
Other	(1)	(2)
Net cash used in investing activities	(3,106)	(2,656)
Cash Flows From Financing Activities:
Dividends on common stock	(535)	(496)
Dividends paid to noncontrolling interest holders	(4)	(4)
Short-term debt, net	1,002	272
Maturities of long-term debt	(849)	(100)
Issuances of long-term debt	1,610	997
Issuances of common stock	30	28
Employee payroll taxes related to stock-based compensation	(8)	(20)
Debt issuance costs	(19)	(12)
Other	(15)	(10)
Net cash provided by financing activities	1,212	655
Net change in cash, cash equivalents, and restricted cash	52	30
Cash, cash equivalents, and restricted cash at beginning of year	272	216
Cash, cash equivalents, and restricted cash at end of period	324	246
Union Electric Company
Cash Flows From Operating Activities:
Net income	537	544
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	641	618
Amortization of nuclear fuel	59	56
Amortization of debt issuance costs and premium/discounts	5	5
Deferred income taxes and investment tax credits, net	2	(73)
Allowance for equity funds used during construction	(38)	(20)
Other	69	(12)
Changes in assets and liabilities:
Receivables	(178)	(119)
Inventories	(21)	(78)
Accounts and wages payable	(223)	(206)
Taxes accrued	218	222
Regulatory assets and liabilities	(5)	65
Assets, other	(17)	12
Liabilities, other	10	(5)
Pension and other postretirement benefits	(59)	(67)
Counterparty collateral, net	(3)	89
Net cash provided by operating activities	997	1,031
Cash Flows From Investing Activities:
Capital expenditures	(1,839)	(1,255)
Nuclear fuel expenditures	(57)	(63)
Purchases of securities – nuclear decommissioning trust fund	(499)	(156)
Sales and maturities of securities – nuclear decommissioning trust fund	480	136
Money pool advances, net	(9)	0
Other	(8)	0
Net cash used in investing activities	(1,932)	(1,338)
Cash Flows From Financing Activities:
Dividends on preferred stock	(3)	(3)
Short-term debt, net	406	(172)
Money pool borrowings, net	(289)	0
Maturities of long-term debt	(350)	0
Issuances of long-term debt	846	499
Capital contributions from parent	350	0
Debt issuance costs	(10)	(7)
Other	(15)	(10)
Net cash provided by financing activities	935	307
Net change in cash, cash equivalents, and restricted cash	0	0
Cash, cash equivalents, and restricted cash at beginning of year	10	13
Cash, cash equivalents, and restricted cash at end of period	10	13
Ameren Illinois Company
Cash Flows From Operating Activities:
Net income	454	453
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	461	410
Amortization of debt issuance costs and premium/discounts	3	3
Deferred income taxes and investment tax credits, net	72	123
Allowance for equity funds used during construction	(10)	(15)
Other	32	31
Changes in assets and liabilities:
Receivables	(23)	164
Inventories	(35)	(15)
Accounts and wages payable	(8)	(77)
Taxes accrued	118	19
Regulatory assets and liabilities	96	(45)
Assets, other	(38)	(80)
Liabilities, other	(2)	74
Pension and other postretirement benefits	(66)	(74)
Counterparty collateral, net	13	55
Net cash provided by operating activities	1,067	1,026
Cash Flows From Investing Activities:
Capital expenditures	(1,091)	(1,226)
Other	1	(3)
Net cash used in investing activities	(1,090)	(1,229)
Cash Flows From Financing Activities:
Dividends on common stock	(50)	0
Dividends on preferred stock	(1)	(1)
Short-term debt, net	(349)	(205)
Money pool borrowings, net	(135)	0
Maturities of long-term debt	0	(100)
Issuances of long-term debt	624	498
Capital contributions from parent	0	50
Debt issuance costs	(7)	(5)
Net cash provided by financing activities	82	237
Net change in cash, cash equivalents, and restricted cash	59	34
Cash, cash equivalents, and restricted cash at beginning of year	234	191
Cash, cash equivalents, and restricted cash at end of period	$ 293	$ 225