Consolidated Statement of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash Flows From Operating Activities:
Net income	$ 392	$ 373
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	532	494
Amortization of nuclear fuel	45	33
Amortization of debt issuance costs and premium/discounts	11	9
Deferred income taxes and investment tax credits, net	68	54
Allowance for equity funds used during construction	(13)	(13)
Stock-based compensation costs	11	10
Other	5	(5)
Changes in assets and liabilities:
Receivables	(161)	(46)
Inventories	(19)	50
Accounts and wages payable	(193)	(199)
Taxes accrued	108	77
Regulatory assets and liabilities	(87)	4
Assets, other	(9)	(11)
Liabilities, other	9	63
Pension and other postretirement benefits	(5)	(14)
Net cash provided by operating activities	694	879
Cash Flows From Investing Activities:
Capital expenditures	(1,228)	(1,125)
Nuclear fuel expenditures	(56)	(25)
Purchases of securities – nuclear decommissioning trust fund	(153)	(96)
Sales and maturities of securities – nuclear decommissioning trust fund	121	95
Purchase of bonds	0	(97)
Proceeds from sale of remarketed bonds	0	97
Other	1	(3)
Net cash used in investing activities	(1,315)	(1,154)
Cash Flows From Financing Activities:
Dividends on common stock	(244)	(233)
Dividends paid to noncontrolling interest holders	(3)	(3)
Short-term debt, net	(320)	401
Maturities of long-term debt	(85)	(329)
Issuances of long-term debt	1,263	450
Issuances of common stock	27	37
Employee payroll taxes related to stock-based compensation	(20)	(29)
Debt issuance costs	(10)	(4)
Net cash provided by financing activities	608	290
Net change in cash, cash equivalents, and restricted cash	(13)	15
Cash, cash equivalents, and restricted cash at beginning of year	176	107
Cash, cash equivalents, and restricted cash at end of period	163	122
Union Electric Company
Cash Flows From Operating Activities:
Net income	144	148
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	300	277
Amortization of nuclear fuel	45	33
Amortization of debt issuance costs and premium/discounts	3	2
Deferred income taxes and investment tax credits, net	14	(10)
Allowance for equity funds used during construction	(8)	(8)
Other	6	5
Changes in assets and liabilities:
Receivables	(149)	(83)
Inventories	(32)	22
Accounts and wages payable	(175)	(158)
Taxes accrued	151	109
Regulatory assets and liabilities	(13)	7
Assets, other	15	(9)
Liabilities, other	(10)	28
Pension and other postretirement benefits	1	(2)
Net cash provided by operating activities	292	361
Cash Flows From Investing Activities:
Capital expenditures	(516)	(495)
Nuclear fuel expenditures	(56)	(25)
Purchases of securities – nuclear decommissioning trust fund	(153)	(96)
Sales and maturities of securities – nuclear decommissioning trust fund	121	95
Purchase of bonds	0	(97)
Proceeds from sale of remarketed bonds	0	97
Net cash used in investing activities	(604)	(521)
Cash Flows From Financing Activities:
Dividends on common stock	0	(100)
Dividends on preferred stock	(2)	(2)
Short-term debt, net	(155)	150
Money pool borrowings, net	65	0
Maturities of long-term debt	(85)	(329)
Issuances of long-term debt	465	450
Debt issuance costs	(4)	(4)
Net cash provided by financing activities	284	165
Net change in cash, cash equivalents, and restricted cash	(28)	5
Cash, cash equivalents, and restricted cash at beginning of year	39	8
Cash, cash equivalents, and restricted cash at end of period	11	13
Ameren Illinois Company
Cash Flows From Operating Activities:
Net income	205	184
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	214	201
Amortization of debt issuance costs and premium/discounts	6	6
Deferred income taxes and investment tax credits, net	40	43
Allowance for equity funds used during construction	(5)	(5)
Other	(5)	0
Changes in assets and liabilities:
Receivables	(13)	35
Inventories	13	28
Accounts and wages payable	(12)	(38)
Taxes accrued	(32)	(22)
Regulatory assets and liabilities	(65)	1
Assets, other	(15)	1
Liabilities, other	12	24
Pension and other postretirement benefits	(8)	(11)
Net cash provided by operating activities	340	452
Cash Flows From Investing Activities:
Capital expenditures	(661)	(556)
Other	2	(2)
Net cash used in investing activities	(659)	(558)
Cash Flows From Financing Activities:
Dividends on preferred stock	(2)	(2)
Short-term debt, net	(12)	127
Capital contribution from parent	350	0
Net cash provided by financing activities	336	125
Net change in cash, cash equivalents, and restricted cash	17	19
Cash, cash equivalents, and restricted cash at beginning of year	125	80
Cash, cash equivalents, and restricted cash at end of period	$ 142	$ 99