Consolidated Statement of Cash Flows - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014
Cash Flows From Operating Activities:
Net income (loss)		$ 261	$ 248
(Income) loss from discontinued operations, net of taxes		(52)	2
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		387	349
Amortization of nuclear fuel		47	47
Amortization of debt issuance costs and premium/discounts		11	11
Deferred income taxes and investment tax credits, net		116	178
Allowance for equity funds used during construction	[1]	(11)	(16)
Stock-based compensation costs		14	15
Other		(13)	(8)
Changes in assets and liabilities:
Receivables		(80)	(62)
Materials and supplies		25	35
Accounts and wages payable		(180)	(180)
Taxes accrued		81	68
Regulatory assets and liabilities		65	(98)
Assets, other		25	54
Liabilities, other		(27)	(21)
Pension and other postretirement benefits		28	21
Counterparty collateral, net		2	15
Net cash provided by operating activities – continuing operations		768	658
Net cash used in operating activities – discontinued operations		(1)	(4)
Net cash provided by operating activities		767	654
Cash Flows From Investing Activities:
Capital expenditures		(846)	(883)
Nuclear fuel expenditures		(28)	(26)
Purchases of securities - nuclear decommissioning trust fund		(117)	(290)
Sales and maturities of securities - nuclear decommissioning trust fund		110	283
Proceeds from Notes Receivable		10	70
Contributions to Note Receivable		(7)	(78)
Other		3	2
Net cash used in investing activities – continuing operations		(875)	(922)
Net cash provided by investing activities – discontinued operations		0	152
Net cash used in investing activities		(875)	(770)
Cash Flows From Financing Activities:
Dividends on common stock		(199)	(194)
Dividends paid to noncontrolling interest holders		(3)	(3)
Short-term debt, net		172	425
Redemptions of Long-term Debt		(114)	(692)
Issuances of Long-term Debt		249	598
Capital issuance costs		(2)	(4)
Other		2	2
Net cash provided by (used in) financing activities – continuing operations		105	132
Net cash used in financing activities - discontinued operations		0	0
Net cash provided by financing activities		105	132
Net change in cash and cash equivalents		(3)	16
Cash and cash equivalents at beginning of period		5	30
Cash and cash equivalents at end of period		2	46
Union Electric Company
Cash Flows From Operating Activities:
Net income (loss)		104	175
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		238	220
Amortization of nuclear fuel		47	47
Amortization of debt issuance costs and premium/discounts		3	4
Deferred income taxes and investment tax credits, net		27	61
Allowance for equity funds used during construction		(9)	(15)
Changes in assets and liabilities:
Receivables		(80)	(97)
Materials and supplies		(24)	0
Accounts and wages payable		(180)	(163)
Taxes accrued		123	(65)
Regulatory assets and liabilities		63	(49)
Assets, other		16	43
Liabilities, other		35	40
Pension and other postretirement benefits		14	11
Net cash provided by operating activities		446	212
Cash Flows From Investing Activities:
Capital expenditures		(289)	(375)
Nuclear fuel expenditures		(28)	(26)
Purchases of securities - nuclear decommissioning trust fund		(117)	(290)
Sales and maturities of securities - nuclear decommissioning trust fund		110	283
Other		(4)	(5)
Net cash used in investing activities		(328)	(413)
Cash Flows From Financing Activities:
Dividends on common stock		(415)	(155)
Dividends on preferred stock		(2)	(2)
Short-term debt, net		(59)	185
Money pool borrowings, net		0	(44)
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 provided by financing activities		(119)	228
Net change in cash and cash equivalents		(1)	27
Cash and cash equivalents at beginning of period		1	1
Cash and cash equivalents at end of period		0	28
Ameren Illinois Company
Cash Flows From Operating Activities:
Net income (loss)		86	83
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		144	125
Amortization of debt issuance costs and premium/discounts		7	6
Deferred income taxes and investment tax credits, net		45	58
Allowance for equity funds used during construction		(2)	(1)
Other		(5)	(4)
Changes in assets and liabilities:
Receivables		57	36
Materials and supplies		48	36
Accounts and wages payable		20	2
Taxes accrued		(6)	(5)
Regulatory assets and liabilities		(1)	(46)
Assets, other		8	10
Liabilities, other		(29)	(22)
Pension and other postretirement benefits		12	7
Counterparty collateral, net		0	15
Net cash provided by operating activities		386	301
Cash Flows From Investing Activities:
Capital expenditures		(379)	(436)
Other		4	4
Net cash used in investing activities		(375)	(432)
Cash Flows From Financing Activities:
Dividends on preferred stock		(2)	(2)
Short-term debt, net		(20)	105
Money pool borrowings, net		10	(56)
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	2
Net cash provided by financing activities		(12)	132
Net change in cash and cash equivalents		(1)	1
Cash and cash equivalents at beginning of period		1	1
Cash and cash equivalents at end of period		$ 0	$ 2

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