Consolidated Statement of Cash Flows - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014
Cash Flows From Operating Activities:
Net income (loss)		$ 606	$ 543
(Income) loss from discontinued operations, net of taxes		(52)	3
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Provision for Callaway construction and operating license		69	0
Depreciation and amortization		582	526
Amortization of nuclear fuel		71	70
Amortization of debt issuance costs and premium/discounts		16	16
Deferred income taxes and investment tax credits, net		318	370
Allowance for equity funds used during construction	[1]	(19)	(26)
Stock-based compensation costs		20	20
Other		(8)	(9)
Changes in assets and liabilities:
Receivables		(71)	16
Materials and supplies		(23)	(34)
Accounts and wages payable		(172)	(187)
Taxes accrued		114	100
Regulatory assets and liabilities		74	(216)
Assets, other		20	44
Liabilities, other		(41)	(21)
Pension and other postretirement benefits		29	(27)
Counterparty collateral, net		0	20
Net cash provided by operating activities – continuing operations		1,533	1,208
Net cash used in operating activities – discontinued operations		(5)	(5)
Net cash provided by operating activities		1,528	1,203
Cash Flows From Investing Activities:
Capital expenditures		(1,332)	(1,310)
Nuclear fuel expenditures		(30)	(28)
Purchases of securities - nuclear decommissioning trust fund		(301)	(365)
Sales and maturities of securities - nuclear decommissioning trust fund		290	354
Proceeds from Notes Receivable		12	79
Contributions to Note Receivable		(8)	(84)
Other		7	3
Net cash used in investing activities – continuing operations		(1,362)	(1,351)
Net cash provided by investing activities – discontinued operations		0	139
Net cash used in investing activities		(1,362)	(1,212)
Cash Flows From Financing Activities:
Dividends on common stock		(298)	(291)
Dividends paid to noncontrolling interest holders		(5)	(5)
Short-term debt, net		69	385
Redemptions of Long-term Debt		(114)	(692)
Issuances of Long-term Debt		249	598
Capital issuance costs		(2)	(4)
Other		2	1
Net cash provided by (used in) financing activities – continuing operations		(99)	(8)
Net cash used in financing activities - discontinued operations		0	0
Net cash used in financing activities		(99)	(8)
Net change in cash and cash equivalents		67	(17)
Cash and cash equivalents at beginning of period		5	30
Cash and cash equivalents at end of period		72	13
Union Electric Company
Cash Flows From Operating Activities:
Net income (loss)		344	398
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Provision for Callaway construction and operating license		69	0
Depreciation and amortization		356	329
Amortization of nuclear fuel		71	70
Amortization of debt issuance costs and premium/discounts		5	5
Deferred income taxes and investment tax credits, net		88	139
Allowance for equity funds used during construction		(16)	(24)
Other		1	1
Changes in assets and liabilities:
Receivables		(51)	(76)
Materials and supplies		(26)	3
Accounts and wages payable		(177)	(151)
Taxes accrued		243	(22)
Regulatory assets and liabilities		101	(78)
Assets, other		6	44
Liabilities, other		11	30
Pension and other postretirement benefits		15	(8)
Net cash provided by operating activities		1,040	660
Cash Flows From Investing Activities:
Capital expenditures		(444)	(548)
Nuclear fuel expenditures		(30)	(28)
Purchases of securities - nuclear decommissioning trust fund		(301)	(365)
Sales and maturities of securities - nuclear decommissioning trust fund		290	354
Money pool advances, net		(250)	0
Other		(4)	(6)
Net cash used in investing activities		(739)	(593)
Cash Flows From Financing Activities:
Dividends on common stock		(490)	(268)
Dividends on preferred stock		(3)	(3)
Short-term debt, net		(97)	65
Money pool borrowings, net		0	(105)
Redemptions of Long-term Debt		(114)	(104)
Issuances of Long-term Debt		249	350
Capital contribution from parent		224	0
Capital issuance costs		(2)	(2)
Net cash used in financing activities		(233)	(67)
Net change in cash and cash equivalents		68	0
Cash and cash equivalents at beginning of period		1	1
Cash and cash equivalents at end of period		69	1
Ameren Illinois Company
Cash Flows From Operating Activities:
Net income (loss)		184	158
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		218	190
Amortization of debt issuance costs and premium/discounts		11	10
Deferred income taxes and investment tax credits, net		108	136
Allowance for equity funds used during construction		(3)	(2)
Other		(7)	(6)
Changes in assets and liabilities:
Receivables		45	80
Materials and supplies		3	(37)
Accounts and wages payable		11	1
Taxes accrued		(10)	(5)
Regulatory assets and liabilities		(31)	(135)
Assets, other		7	6
Liabilities, other		(13)	(4)
Pension and other postretirement benefits		13	(12)
Counterparty collateral, net		2	14
Net cash provided by operating activities		541	396
Cash Flows From Investing Activities:
Capital expenditures		(620)	(633)
Other		5	6
Net cash used in investing activities		(615)	(627)
Cash Flows From Financing Activities:
Dividends on preferred stock		(2)	(2)
Short-term debt, net		(32)	189
Money pool borrowings, net		107	(40)
Redemptions of Long-term Debt		0	(163)
Issuances of Long-term Debt		0	248
Capital issuance costs		0	(2)
Proceeds from Advances for Construction		0	1
Net cash used in financing activities		73	231
Net change in cash and cash equivalents		(1)	0
Cash and cash equivalents at beginning of period		1	1
Cash and cash equivalents at end of period		$ 0	$ 1

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