Consolidated Statement of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013
Cash Flows From Operating Activities:
Net income (loss)	$ 248		$ (47)
Loss from discontinued operations, net of taxes	2		209
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	349		334
Amortization of nuclear fuel	47		29
Amortization of debt issuance costs and premium/discounts	11		12
Deferred income taxes and investment tax credits, net	178		70
Allowance for equity funds used during construction	(16)	[1]	(16)	[1]
Stock-based compensation costs	15		14
Other	(8)		18
Changes in assets and liabilities:
Receivables	(62)		(92)
Materials and supplies	35		77
Accounts and wages payable	(180)		(75)
Taxes accrued	68		67
Assets, other	(68)		49
Liabilities, other	3		9
Pension and other postretirement benefits	21		36
Counterparty collateral, net	15		35
Net cash provided by operating activities – continuing operations	658		729
Net cash provided by (used in) operating activities – discontinued operations	(4)		39
Net cash provided by operating activities	654		768
Cash Flows From Investing Activities:
Capital expenditures	(883)		(575)
Nuclear fuel expenditures	(26)		(25)
Purchases of securities - nuclear decommissioning trust fund	(290)		(97)
Sales and maturities of securities - nuclear decommissioning trust fund	283		89
Proceeds from Notes Receivable	70
Contributions to Note Receivable	(78)
Other	2		2
Net cash used in investing activities – continuing operations	(922)		(606)
Net cash provided by (used in) investing activities – discontinued operations	152		(31)
Net cash used in investing activities	(770)		(637)
Cash Flows From Financing Activities:
Dividends on common stock	(194)		(194)
Dividends paid to noncontrolling interest holders	(3)		(3)
Short-term debt, net	425		25
Repayments of Other Long-term Debt	(692)
Proceeds from Issuance of Long-term Debt	598
Capital Issuance Costs	(4)
Advances received for construction	2		7
Net cash provided by (used in) financing activities – continuing operations	132		(165)
Net cash used in financing activities – discontinued operations
Net cash provided by (used in) financing activities	132		(165)
Net change in cash and cash equivalents	16		(34)
Cash and cash equivalents at beginning of period	30		209
Cash and cash equivalents at end of period	46		175
Less cash and cash equivalents at end of period, discontinued operations			25
Cash and cash equivalents at beginning of period	30
Cash and cash equivalents at end of period	46		150
Union Electric Company
Cash Flows From Operating Activities:
Net income (loss)	175		126
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	220		208
Amortization of nuclear fuel	47		29
FAC prudence review charge			23
Amortization of debt issuance costs and premium/discounts	4		4
Deferred income taxes and investment tax credits, net	61		13
Allowance for equity funds used during construction	(15)		(14)
Changes in assets and liabilities:
Receivables	(97)		(155)
Materials and supplies			28
Accounts and wages payable	(163)		(119)
Taxes accrued	(65)		79
Assets, other	(5)		61
Liabilities, other	39		37
Pension and other postretirement benefits	11		18
Net cash provided by operating activities	212		338
Cash Flows From Investing Activities:
Capital expenditures	(375)		(273)
Nuclear fuel expenditures	(26)		(25)
Money pool advances, net			24
Purchases of securities - nuclear decommissioning trust fund	(290)		(97)
Sales and maturities of securities - nuclear decommissioning trust fund	283		89
Other	(5)		(3)
Net cash used in investing activities	(413)		(285)
Cash Flows From Financing Activities:
Dividends on common stock	(155)		(180)
Dividends on preferred stock	(2)		(2)
Money pool borrowings, net	(44)
Redemptions of Long-term Debt	(104)
Short-term debt, net	185
Proceeds from Issuance of Long-term Debt	350
Capital Issuance Costs	(2)
Net cash provided by (used in) financing activities	228		(182)
Net change in cash and cash equivalents	27		(129)
Cash and cash equivalents at beginning of period	1		148
Cash and cash equivalents at end of period	28		19
Ameren Illinois Company
Cash Flows From Operating Activities:
Net income (loss)	83		64
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	125		121
Amortization of debt issuance costs and premium/discounts	6		7
Deferred income taxes and investment tax credits, net	58		61
Other	(4)		(4)
Changes in assets and liabilities:
Receivables	36		62
Materials and supplies	36		50
Accounts and wages payable	2		46
Taxes accrued	(5)		(6)
Assets, other	(61)		(4)
Liabilities, other	3		(18)
Pension and other postretirement benefits	7		15
Counterparty collateral, net	15		32
Net cash provided by operating activities	301		426
Cash Flows From Investing Activities:
Capital expenditures	(436)		(283)
Other	4		4
Net cash used in investing activities	(432)		(279)
Cash Flows From Financing Activities:
Dividends on common stock			(30)
Dividends on preferred stock	(2)		(2)
Money pool borrowings, net	(56)		(24)
Redemptions of Long-term Debt	(163)
Short-term debt, net	105
Proceeds from Issuance of Long-term Debt	248
Capital Issuance Costs	(2)
Advances received for construction	2		7
Net cash provided by (used in) financing activities	132		(49)
Net change in cash and cash equivalents	1		98
Cash and cash equivalents at beginning of period	1
Cash and cash equivalents at end of period	$ 2		$ 98

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