Consolidated Statement of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash Flows From Operating Activities:
Net income	$ 148	$ 193
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	263	245
Amortization of nuclear fuel	23	23
Amortization of debt issuance costs and premium/discounts	5	5
Deferred income taxes and investment tax credits, net	23	32
Allowance for equity funds used during construction	(4)	(6)
Stock-based compensation costs	6	6
Other	17	(8)
Changes in assets and liabilities:
Receivables	(5)	4
Inventories	23	81
Accounts and wages payable	(221)	(213)
Taxes accrued	47	28
Regulatory assets and liabilities	(14)	26
Assets, other	(3)	(14)
Liabilities, other	(18)	(11)
Pension and other postretirement benefits	0	(4)
Net cash provided by operating activities	290	387
Cash Flows From Investing Activities:
Capital expenditures	(636)	(544)
Nuclear fuel expenditures	(35)	(21)
Purchases of securities – nuclear decommissioning trust fund	(96)	(39)
Sales and maturities of securities – nuclear decommissioning trust fund	81	36
Other	2	1
Net cash used in investing activities	(684)	(567)
Cash Flows From Financing Activities:
Dividends on common stock	(122)	(116)
Dividends paid to noncontrolling interest holders	(2)	(2)
Short-term debt, net	175	202
Maturities of long-term debt	(85)	(329)
Issuances of long-term debt	465	450
Issuances of common stock	13	19
Employee payroll taxes related to stock-based compensation	(20)	(29)
Debt issuance costs	(3)	(4)
Net cash provided by financing activities	421	191
Net change in cash, cash equivalents, and restricted cash	27	11
Cash, cash equivalents, and restricted cash at beginning of year	176	107
Cash, cash equivalents, and restricted cash at end of period	203	118
Union Electric Company
Cash Flows From Operating Activities:
Net income	(9)	40
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	148	138
Amortization of nuclear fuel	23	23
Amortization of debt issuance costs and premium/discounts	2	2
Deferred income taxes and investment tax credits, net	(5)	(1)
Allowance for equity funds used during construction	(2)	(4)
Other	2	2
Changes in assets and liabilities:
Receivables	(3)	56
Inventories	(18)	29
Accounts and wages payable	(172)	(167)
Taxes accrued	55	44
Regulatory assets and liabilities	16	11
Assets, other	2	(16)
Liabilities, other	0	(4)
Pension and other postretirement benefits	2	(1)
Net cash provided by operating activities	41	152
Cash Flows From Investing Activities:
Capital expenditures	(278)	(240)
Nuclear fuel expenditures	(35)	(21)
Purchases of securities – nuclear decommissioning trust fund	(96)	(39)
Sales and maturities of securities – nuclear decommissioning trust fund	81	36
Net cash used in investing activities	(328)	(264)
Cash Flows From Financing Activities:
Dividends on preferred stock	(1)	(1)
Short-term debt, net	(104)	0
Maturities of long-term debt	(85)	(329)
Issuances of long-term debt	465	450
Debt issuance costs	(3)	(4)
Net cash provided by financing activities	272	116
Net change in cash, cash equivalents, and restricted cash	(15)	4
Cash, cash equivalents, and restricted cash at beginning of year	39	8
Cash, cash equivalents, and restricted cash at end of period	24	12
Ameren Illinois Company
Cash Flows From Operating Activities:
Net income	121	121
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	106	100
Amortization of debt issuance costs and premium/discounts	2	3
Deferred income taxes and investment tax credits, net	22	24
Allowance for equity funds used during construction	(2)	(2)
Other	(2)	(1)
Changes in assets and liabilities:
Receivables	(6)	(56)
Inventories	41	52
Accounts and wages payable	(20)	(34)
Taxes accrued	16	12
Regulatory assets and liabilities	(28)	18
Assets, other	(4)	3
Liabilities, other	(14)	(12)
Pension and other postretirement benefits	(2)	(3)
Net cash provided by operating activities	232	227
Cash Flows From Investing Activities:
Capital expenditures	(324)	(267)
Other	1	0
Net cash used in investing activities	(323)	(267)
Cash Flows From Financing Activities:
Dividends on preferred stock	(1)	(1)
Short-term debt, net	7	54
Capital contribution from parent	100	0
Net cash provided by financing activities	106	53
Net change in cash, cash equivalents, and restricted cash	15	13
Cash, cash equivalents, and restricted cash at beginning of year	125	80
Cash, cash equivalents, and restricted cash at end of period	$ 140	$ 93