Consolidated Statement of Cash Flows - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015
Cash Flows From Operating Activities:
Net income		$ 255	$ 261
(Income) from discontinued operations, net of taxes		0	(52)
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for Callaway construction and operating license		0	69
Depreciation and amortization		419	387
Amortization of nuclear fuel		38	47
Amortization of debt issuance costs and premium/discounts		11	11
Deferred income taxes and investment tax credits, net		134	116
Allowance for equity funds used during construction	[1]	(13)	(11)
Share-based compensation costs		12	14
Other		(7)	(13)
Changes in assets and liabilities:
Receivables		(111)	(80)
Materials and supplies		23	25
Accounts and wages payable		(200)	(180)
Taxes accrued		80	83
Regulatory assets and liabilities		108	65
Assets, other		24	27
Liabilities, other		(12)	(15)
Pension and other postretirement benefits		4	28
Net cash provided by operating activities – continuing operations		765	782
Net cash used in operating activities – discontinued operations		(2)	(1)
Net cash provided by operating activities		763	781
Cash Flows From Investing Activities:
Capital expenditures		(1,000)	(846)
Nuclear fuel expenditures		(24)	(28)
Purchases of securities - nuclear decommissioning trust fund		(201)	(117)
Sales and maturities of securities - nuclear decommissioning trust fund		192	110
Proceeds from Notes Receivable		0	10
Contributions to Note Receivable		0	(7)
Other		(2)	3
Net cash used in investing activities – continuing operations		(1,035)	(875)
Net cash used in investing activities – discontinued operations		0	0
Net cash used in investing activities		(1,035)	(875)
Cash Flows From Financing Activities:
Dividends on common stock		(206)	(199)
Dividends paid to noncontrolling interest holders		(3)	(3)
Short-term debt, net		477	172
Maturities of Long-term Debt		(389)	(114)
Issuances of Long-term Debt		149	249
Employee payroll taxes related to share-based payments		(32)	(12)
Capital Issuance Costs		(1)	(2)
Other		(2)	0
Net cash provided by (used in) financing activities – continuing operations		(7)	91
Net change in cash and cash equivalents		(279)	(3)
Cash and cash equivalents at beginning of period		292	5
Cash and cash equivalents at end of period		13	2
Union Electric Company
Cash Flows From Operating Activities:
Net income		108	104
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for Callaway construction and operating license		0	69
Depreciation and amortization		257	238
Amortization of nuclear fuel		38	47
Amortization of debt issuance costs and premium/discounts		3	3
Deferred income taxes and investment tax credits, net		66	27
Allowance for equity funds used during construction		(10)	(9)
Changes in assets and liabilities:
Receivables		(103)	(80)
Materials and supplies		(9)	(24)
Accounts and wages payable		(174)	(180)
Taxes accrued		80	123
Regulatory assets and liabilities		55	63
Assets, other		14	16
Liabilities, other		37	35
Pension and other postretirement benefits		2	14
Net cash provided by operating activities		364	446
Cash Flows From Investing Activities:
Capital expenditures		(353)	(289)
Nuclear fuel expenditures		(24)	(28)
Purchases of securities - nuclear decommissioning trust fund		(201)	(117)
Sales and maturities of securities - nuclear decommissioning trust fund		192	110
Money pool advances, net		36	0
Other		(4)	(4)
Net cash used in investing activities		(354)	(328)
Cash Flows From Financing Activities:
Dividends on common stock		(210)	(415)
Dividends on preferred stock		(2)	(2)
Short-term debt, net		77	(59)
Maturities of Long-term Debt		(260)	(114)
Issuances of Long-term Debt		149	249
Capital contribution from parent		38	224
Capital Issuance Costs		(1)	(2)
Net cash provided by (used in) financing activities		(209)	(119)
Net change in cash and cash equivalents		(199)	(1)
Cash and cash equivalents at beginning of period		199	1
Cash and cash equivalents at end of period		0	0
Ameren Illinois Company
Cash Flows From Operating Activities:
Net income		106	86
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		156	144
Amortization of debt issuance costs and premium/discounts		7	7
Deferred income taxes and investment tax credits, net		65	45
Allowance for equity funds used during construction		(3)	(2)
Other		(6)	(5)
Changes in assets and liabilities:
Receivables		(5)	57
Materials and supplies		32	48
Accounts and wages payable		(20)	20
Taxes accrued		(14)	(6)
Regulatory assets and liabilities		48	(1)
Assets, other		11	8
Liabilities, other		(1)	(29)
Pension and other postretirement benefits		3	12
Net cash provided by operating activities		382	386
Cash Flows From Investing Activities:
Capital expenditures		(442)	(379)
Other		4	4
Net cash used in investing activities		(438)	(375)
Cash Flows From Financing Activities:
Dividends on common stock		(60)	0
Dividends on preferred stock		(2)	(2)
Short-term debt, net		177	(20)
Money pool borrowings, net		0	10
Maturities of Long-term Debt		(129)	0
Other		(1)	0
Net cash provided by (used in) financing activities		(15)	(12)
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.