Consolidated Statement of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash Flows From Operating Activities:
Net income	$ 739	$ 752
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	745	699
Amortization of nuclear fuel	56	71
Amortization of debt issuance costs and premium/discounts	14	16
Deferred income taxes and investment tax credits, net	144	212
Allowance for equity funds used during construction	(20)	(25)
Stock-based compensation costs	15	15
Other	(11)	21
Changes in assets and liabilities:
Receivables	10	(129)
Inventories	(4)	(4)
Accounts and wages payable	(205)	(198)
Taxes accrued	118	92
Regulatory assets and liabilities	147	213
Assets, other	(56)	(2)
Liabilities, other	11	(45)
Pension and other postretirement benefits	(35)	(2)
Net cash provided by operating activities	1,668	1,686
Cash Flows From Investing Activities:
Capital expenditures	(1,761)	(1,689)
Nuclear fuel expenditures	(26)	(30)
Purchases of securities – nuclear decommissioning trust fund	(192)	(172)
Sales and maturities of securities – nuclear decommissioning trust fund	184	159
Purchase of bonds	(207)	0
Proceeds from sale of remarketed bonds	207	0
Other	(3)	13
Net cash used in investing activities	(1,798)	(1,719)
Cash Flows From Financing Activities:
Dividends on common stock	(350)	(334)
Dividends paid to noncontrolling interest holders	(5)	(5)
Short-term debt, net	(53)	36
Maturities of long-term debt	(329)	(522)
Issuances of long-term debt	900	853
Issuances of common stock	54	56
Employee payroll taxes related to stock-based compensation	(29)	(19)
Debt issuance costs	(10)	(9)
Other	0	1
Net cash provided by financing activities	178	57
Net change in cash, cash equivalents, and restricted cash	48	24
Cash, cash equivalents, and restricted cash at beginning of year	107	68
Cash, cash equivalents, and restricted cash at end of period	155	92
Union Electric Company
Cash Flows From Operating Activities:
Net income	449	503
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	419	398
Amortization of nuclear fuel	56	71
Amortization of debt issuance costs and premium/discounts	4	4
Deferred income taxes and investment tax credits, net	(9)	4
Allowance for equity funds used during construction	(14)	(19)
Other	10	14
Changes in assets and liabilities:
Receivables	(32)	(156)
Inventories	3	3
Accounts and wages payable	(153)	(168)
Taxes accrued	148	148
Regulatory assets and liabilities	5	149
Assets, other	(37)	0
Liabilities, other	(4)	7
Pension and other postretirement benefits	(5)	3
Net cash provided by operating activities	840	961
Cash Flows From Investing Activities:
Capital expenditures	(751)	(664)
Nuclear fuel expenditures	(26)	(30)
Purchases of securities – nuclear decommissioning trust fund	(192)	(172)
Sales and maturities of securities – nuclear decommissioning trust fund	184	159
Purchase of bonds	(207)	0
Proceeds from sale of remarketed bonds	207	0
Money pool advances, net	0	(28)
Net cash used in investing activities	(785)	(735)
Cash Flows From Financing Activities:
Dividends on common stock	(250)	(225)
Dividends on preferred stock	(3)	(3)
Short-term debt, net	89	(39)
Maturities of long-term debt	(329)	(378)
Issuances of long-term debt	450	423
Debt issuance costs	(6)	(4)
Net cash provided by financing activities	(49)	(226)
Net change in cash, cash equivalents, and restricted cash	6	0
Cash, cash equivalents, and restricted cash at beginning of year	8	7
Cash, cash equivalents, and restricted cash at end of period	14	7
Ameren Illinois Company
Cash Flows From Operating Activities:
Net income	249	222
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	303	278
Amortization of debt issuance costs and premium/discounts	9	10
Deferred income taxes and investment tax credits, net	42	56
Allowance for equity funds used during construction	(6)	(6)
Other	8	5
Changes in assets and liabilities:
Receivables	18	21
Inventories	(7)	(7)
Accounts and wages payable	(48)	(44)
Taxes accrued	14	(40)
Regulatory assets and liabilities	147	63
Assets, other	(15)	0
Liabilities, other	13	(40)
Pension and other postretirement benefits	(27)	(8)
Net cash provided by operating activities	706	516
Cash Flows From Investing Activities:
Capital expenditures	(900)	(947)
Other	(3)	10
Net cash used in investing activities	(903)	(937)
Cash Flows From Financing Activities:
Dividends on preferred stock	(2)	(2)
Short-term debt, net	237	46
Money pool borrowings, net	0	45
Maturities of long-term debt	0	(144)
Issuances of long-term debt	0	430
Debt issuance costs	0	(5)
Capital contribution from parent	0	80
Other	(1)	1
Net cash provided by financing activities	234	451
Net change in cash, cash equivalents, and restricted cash	37	30
Cash, cash equivalents, and restricted cash at beginning of year	80	41
Cash, cash equivalents, and restricted cash at end of period	$ 117	$ 71