Consolidated Statement of Cash Flows - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Cash Flows From Operating Activities:
Net income (loss)		$ 107	$ 110
(Income) from discontinued operations, net of taxes		0	0
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		210	195
Amortization of nuclear fuel		24	23
Amortization of debt issuance costs and premium/discounts		6	5
Deferred income taxes and investment tax credits, net		42	59
Allowance for equity funds used during construction	[1]	(8)	(5)
Share-based compensation costs		6	8
Other		(3)	(11)
Changes in assets and liabilities:
Receivables		55	(48)
Materials and supplies		55	75
Accounts and wages payable		(246)	(215)
Taxes accrued		30	35
Regulatory assets and liabilities		81	62
Assets, other		4	14
Liabilities, other		(25)	(21)
Pension and other postretirement benefits		9	27
Counterparty collateral, net		3	(2)
Net cash provided by operating activities – continuing operations		350	311
Net cash provided by (used in) operating activities – discontinued operations		(1)	1
Net cash provided by operating activities		349	312
Cash Flows From Investing Activities:
Capital expenditures		(496)	(417)
Nuclear fuel expenditures		(21)	(17)
Purchases of securities - nuclear decommissioning trust fund		(130)	(84)
Sales and maturities of securities - nuclear decommissioning trust fund		125	79
Proceeds from Notes Receivable		0	5
Contributions to Note Receivable		0	(5)
Other		(2)	0
Net cash used in investing activities – continuing operations		(524)	(439)
Net cash provided by investing activities – discontinued operations		14	0
Net cash used in investing activities		(510)	(439)
Cash Flows From Financing Activities:
Dividends on common stock		(103)	(99)
Dividends paid to noncontrolling interest holders		(2)	(2)
Short-term debt, net		280	241
Maturity of Long-term Debt		(260)	0
Employee payroll taxes related to share-based payments		(32)	(12)
Other		(1)	0
Net cash provided by (used in) financing activities – continuing operations		(118)	128
Net change in cash and cash equivalents		(279)	1
Cash and cash equivalents at beginning of period		292	5
Cash and cash equivalents at end of period		13	6
Union Electric Company
Cash Flows From Operating Activities:
Net income (loss)		15	42
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		130	121
Amortization of nuclear fuel		24	23
Amortization of debt issuance costs and premium/discounts		2	2
Deferred income taxes and investment tax credits, net		9	21
Allowance for equity funds used during construction		(7)	(4)
Changes in assets and liabilities:
Receivables		81	60
Materials and supplies		(2)	(14)
Accounts and wages payable		(172)	(171)
Taxes accrued		31	40
Regulatory assets and liabilities		45	27
Assets, other		5	3
Liabilities, other		3	(5)
Pension and other postretirement benefits		5	12
Net cash provided by operating activities		169	157
Cash Flows From Investing Activities:
Capital expenditures		(178)	(145)
Nuclear fuel expenditures		(21)	(17)
Purchases of securities - nuclear decommissioning trust fund		(130)	(84)
Sales and maturities of securities - nuclear decommissioning trust fund		125	79
Money pool advances, net		36	0
Other		(2)	(2)
Net cash used in investing activities		(170)	(169)
Cash Flows From Financing Activities:
Dividends on common stock		(140)	(315)
Dividends on preferred stock		(1)	(1)
Short-term debt, net		165	43
Money pool borrowings, net		0	61
Maturity of Long-term Debt		(260)	0
Capital contribution from parent		38	224
Net cash provided by (used in) financing activities		(198)	12
Net change in cash and cash equivalents		(199)	0
Cash and cash equivalents at beginning of period		199	1
Cash and cash equivalents at end of period		0	1
Ameren Illinois Company
Cash Flows From Operating Activities:
Net income (loss)		60	54
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		77	72
Amortization of debt issuance costs and premium/discounts		4	4
Deferred income taxes and investment tax credits, net		37	13
Allowance for equity funds used during construction		(1)	(1)
Other		(3)	(3)
Changes in assets and liabilities:
Receivables		(22)	(41)
Materials and supplies		57	89
Accounts and wages payable		(33)	(11)
Taxes accrued		(3)	24
Regulatory assets and liabilities		32	33
Assets, other		7	5
Liabilities, other		12	4
Pension and other postretirement benefits		4	11
Net cash provided by operating activities		229	254
Cash Flows From Investing Activities:
Capital expenditures		(211)	(174)
Money pool advances, net		(58)	(33)
Net cash used in investing activities		(269)	(207)
Cash Flows From Financing Activities:
Dividends on common stock		(30)	0
Dividends on preferred stock		(1)	(1)
Short-term debt, net		0	(32)
Money pool borrowings, net		0	(15)
Net cash provided by (used in) financing activities		(31)	(48)
Net change in cash and cash equivalents		(71)	(1)
Cash and cash equivalents at beginning of period		71	1
Cash and cash equivalents at end of period		$ 0	$ 0

[1] Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.