Consolidated Statement of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Cash Flows From Operating Activities:
Net income (loss)	$ 110		$ 98
Loss from discontinued operations, net of taxes	0		1
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	195		176
Amortization of nuclear fuel	23		24
Amortization of debt issuance costs and premium/discounts	5		5
Deferred income taxes and investment tax credits, net	59		84
Allowance for equity funds used during construction	(5)	[1]	(7)	[1]
Stock-based compensation costs	8		9
Other	(11)		(1)
Changes in assets and liabilities:
Receivables	(48)		(86)
Materials and supplies	75		102
Accounts and wages payable	(215)		(183)
Taxes accrued	33		18
Regulatory assets and liabilities	62		(40)
Assets, other	14		10
Liabilities, other	(33)		(11)
Pension and other postretirement benefits	27		30
Counterparty collateral, net	(2)		10
Net cash provided by operating activities – continuing operations	297		239
Net cash provided by operating activities – discontinued operations	1		0
Net cash provided by operating activities	298		239
Cash Flows From Investing Activities:
Capital expenditures	(417)		(442)
Nuclear fuel expenditures	(17)		(10)
Purchases of securities - nuclear decommissioning trust fund	(84)		(186)
Sales and maturities of securities - nuclear decommissioning trust fund	79		182
Proceeds from Notes Receivable	5		56
Contributions to Note Receivable	(5)		(65)
Net cash used in investing activities – continuing operations	(439)		(465)
Net cash provided by investing activities – discontinued operations	0		152
Net cash used in investing activities	(439)		(313)
Cash Flows From Financing Activities:
Dividends on common stock	(99)		(97)
Dividends paid to noncontrolling interest holders	(2)		(2)
Short-term debt, net	241		332
Redemptions of Long-term Debt	0		(163)
Other	2
Net cash provided by (used in) financing activities – continuing operations	142		70
Net cash used in financing activities - discontinued operations	0		0
Net cash provided by financing activities	142		70
Net change in cash and cash equivalents	1		(4)
Cash and cash equivalents at beginning of period	5		30
Cash and cash equivalents at beginning of period	5
Cash and cash equivalents at end of period	6		26
Union Electric Company
Cash Flows From Operating Activities:
Net income (loss)	42		48
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	121		112
Amortization of nuclear fuel	23		24
Amortization of debt issuance costs and premium/discounts	2		2
Deferred income taxes and investment tax credits, net	21		30
Allowance for equity funds used during construction	(4)		(7)
Changes in assets and liabilities:
Receivables	60		2
Materials and supplies	(14)		14
Accounts and wages payable	(171)		(153)
Taxes accrued	40		30
Regulatory assets and liabilities	27		(28)
Assets, other	3		5
Liabilities, other	(5)		2
Pension and other postretirement benefits	12		15
Net cash provided by operating activities	157		96
Cash Flows From Investing Activities:
Capital expenditures	(145)		(188)
Nuclear fuel expenditures	(17)		(10)
Purchases of securities - nuclear decommissioning trust fund	(84)		(186)
Sales and maturities of securities - nuclear decommissioning trust fund	79		182
Other	(2)		(2)
Net cash used in investing activities	(169)		(204)
Cash Flows From Financing Activities:
Dividends on common stock	(315)		(77)
Dividends on preferred stock	(1)		(1)
Short-term debt, net	43		290
Money pool borrowings, net	61		(105)
Capital contribution from parent	224
Net cash provided by financing activities	12		107
Net change in cash and cash equivalents			(1)
Cash and cash equivalents at beginning of period	1		1
Cash and cash equivalents at end of period	1		0
Ameren Illinois Company
Cash Flows From Operating Activities:
Net income (loss)	54		54
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	72		62
Amortization of debt issuance costs and premium/discounts	4		3
Deferred income taxes and investment tax credits, net	13		36
Allowance for equity funds used during construction	(1)
Other	(3)		(2)
Changes in assets and liabilities:
Receivables	(41)		(94)
Materials and supplies	89		88
Accounts and wages payable	(11)		14
Taxes accrued	24		(1)
Regulatory assets and liabilities	33		(11)
Assets, other	6		5
Liabilities, other	4		16
Pension and other postretirement benefits	11		10
Counterparty collateral, net	(1)		12
Net cash provided by operating activities	254		192
Cash Flows From Investing Activities:
Capital expenditures	(174)		(215)
Money pool advances, net	(33)		0
Other	0		1
Net cash used in investing activities	(207)		(214)
Cash Flows From Financing Activities:
Dividends on preferred stock	(1)		(1)
Short-term debt, net	(32)
Money pool borrowings, net	(15)		186
Redemptions of Long-term Debt	0		(163)
Net cash provided by financing activities	(48)		22
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.