Consolidated Statement of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash Flows From Operating Activities:
Net income	$ 504	$ 462
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	703	665
Amortization of nuclear fuel	36	28
Amortization of debt issuance costs and premium/discounts	8	12
Deferred income taxes and investment tax credits, net	66	66
Allowance for equity funds used during construction	(23)	(19)
Stock-based compensation costs	14	12
Other	(19)	33
Changes in assets and liabilities:
Receivables	173	(187)
Inventories	(44)	(8)
Accounts and wages payable	(335)	(87)
Taxes accrued	93	94
Regulatory assets and liabilities	(81)	(74)
Assets, other	(38)	(35)
Liabilities, other	34	45
Pension and other postretirement benefits	(114)	(32)
Counterparty collateral, net	134	(103)
Net cash provided by operating activities	1,111	872
Cash Flows From Investing Activities:
Capital expenditures	(1,822)	(1,538)
Nuclear fuel expenditures	(50)	(22)
Purchases of securities – nuclear decommissioning trust fund	(81)	(122)
Sales and maturities of securities – nuclear decommissioning trust fund	65	114
Other	(1)	16
Net cash used in investing activities	(1,889)	(1,552)
Cash Flows From Financing Activities:
Dividends on common stock	(330)	(305)
Dividends paid to noncontrolling interest holders	(3)	(3)
Short-term debt, net	260	475
Maturities of long-term debt	(100)	0
Issuances of long-term debt	997	524
Issuances of common stock	16	17
Employee payroll taxes related to stock-based compensation	(20)	(16)
Debt issuance costs	(9)	(6)
Other	(3)	0
Net cash provided by financing activities	808	686
Net change in cash, cash equivalents, and restricted cash	30	6
Cash, cash equivalents, and restricted cash at beginning of year	216	155
Cash, cash equivalents, and restricted cash at end of period	246	161
Union Electric Company
Cash Flows From Operating Activities:
Net income	132	152
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	410	393
Amortization of nuclear fuel	36	28
Amortization of debt issuance costs and premium/discounts	3	3
Deferred income taxes and investment tax credits, net	10	19
Allowance for equity funds used during construction	(12)	(10)
Other	(20)	4
Changes in assets and liabilities:
Receivables	(9)	(105)
Inventories	(81)	(7)
Accounts and wages payable	(231)	(159)
Taxes accrued	103	81
Regulatory assets and liabilities	28	(128)
Assets, other	13	12
Liabilities, other	21	24
Pension and other postretirement benefits	(41)	(8)
Counterparty collateral, net	81	(118)
Net cash provided by operating activities	443	181
Cash Flows From Investing Activities:
Capital expenditures	(914)	(806)
Nuclear fuel expenditures	(50)	(22)
Purchases of securities – nuclear decommissioning trust fund	(81)	(122)
Sales and maturities of securities – nuclear decommissioning trust fund	65	114
Other	0	18
Net cash used in investing activities	(980)	(818)
Cash Flows From Financing Activities:
Dividends on preferred stock	(2)	(2)
Short-term debt, net	44	120
Issuances of long-term debt	499	524
Debt issuance costs	(6)	(6)
Other	(3)	0
Net cash provided by financing activities	532	636
Net change in cash, cash equivalents, and restricted cash	(5)	(1)
Cash, cash equivalents, and restricted cash at beginning of year	13	8
Cash, cash equivalents, and restricted cash at end of period	8	7
Ameren Illinois Company
Cash Flows From Operating Activities:
Net income	328	273
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	271	251
Amortization of debt issuance costs and premium/discounts	2	6
Deferred income taxes and investment tax credits, net	70	55
Allowance for equity funds used during construction	(10)	(9)
Other	12	6
Changes in assets and liabilities:
Receivables	182	(76)
Inventories	37	(1)
Accounts and wages payable	(92)	76
Taxes accrued	(36)	62
Regulatory assets and liabilities	(105)	55
Assets, other	(42)	(43)
Liabilities, other	13	23
Pension and other postretirement benefits	(46)	(18)
Counterparty collateral, net	53	15
Net cash provided by operating activities	637	675
Cash Flows From Investing Activities:
Capital expenditures	(844)	(699)
Other	(2)	0
Net cash used in investing activities	(846)	(699)
Cash Flows From Financing Activities:
Dividends on preferred stock	(1)	(1)
Short-term debt, net	(147)	38
Maturities of long-term debt	(100)	0
Issuances of long-term debt	498	0
Debt issuance costs	(3)	0
Net cash provided by financing activities	247	37
Net change in cash, cash equivalents, and restricted cash	38	13
Cash, cash equivalents, and restricted cash at beginning of year	191	133
Cash, cash equivalents, and restricted cash at end of period	$ 229	$ 146