Schedule I - Condensed Financial Information Of Parent

12 Months Ended

Dec. 31, 2016

Condensed Financial Information of Parent Company Only Disclosure [Abstract]

Condensed Financial Information Of Parent

SCHEDULE I – CONDENSED FINANCIAL INFORMATION OF PARENT AMEREN CORPORATION CONDENSED STATEMENT OF INCOME AND COMPREHENSIVE INCOME For the Years Ended December 31, 2016, 2015, and 2014
(In millions)	2016			2015			2014
Operating revenues	$	—		$	—		$	—
Operating expenses	14			14			11
Operating loss	(14		)	(14		)	(11		)
Equity in earnings of subsidiaries	663			600			607
Interest income from affiliates	10			6			3
Total other income (expense), net	(5		)	(5		)	2
Interest charges	28			3			16
Income tax (benefit)	(27		)	5			(2		)
Net Income Attributable to Ameren Common Shareholders – Continuing Operations	653			579			587
Net Income (Loss) Attributable to Ameren Common Shareholders  – Discontinued Operations	—			51			(1		)
Net Income Attributable to Ameren Common Shareholders	$	653		$	630		$	586
Net Income Attributable to Ameren Common Shareholders – Continuing Operations	$	653		$	579		$	587
Other Comprehensive Income, Net of Taxes:
Pension and other postretirement benefit plan activity, net of income taxes (benefit) of $(7), $3, and $(7), respectively	(20		)	6			(12		)
Comprehensive Income from Continuing Operations Attributable to Ameren Common Shareholders	633			585			575
Comprehensive Income (Loss) from Discontinued Operations Attributable to Ameren Common Shareholders	—			51			(1		)
Comprehensive Income Attributable to Ameren Common Shareholders	$	633		$	636		$	574

SCHEDULE I – CONDENSED FINANCIAL INFORMATION OF PARENT AMEREN CORPORATION CONDENSED BALANCE SHEET
(In millions)	December 31, 2016			December 31, 2015
Assets:
Cash and cash equivalents	$	1		$	—
Advances to money pool	27			—
Accounts receivable – affiliates	31			53
Miscellaneous accounts and notes receivable	26			3
Other current assets	8			9
Total current assets	93			65
Investments in subsidiaries	7,498			7,227
Note receivable – ATXI	350			290
Accumulated deferred income taxes, net	419			426
Other assets	135			158
Total assets	$	8,495		$	8,166
Liabilities and Shareholders’ Equity:
Short-term debt	507			301
Borrowings from money pool	33			14
Accounts payable – affiliates	13			75
Other current liabilities	17			22
Total current liabilities	570			412
Long-term debt	694			694
Pension and other postretirement benefits	45			33
Other deferred credits and liabilities	83			81
Total liabilities	1,392			1,220
Commitments and Contingencies (Notes 4 and 5)
Shareholders’ Equity:
Common stock, $.01 par value, 400.0 shares authorized – shares outstanding of 242.6	2			2
Other paid-in capital, principally premium on common stock	5,556			5,616
Retained earnings	1,568			1,331
Accumulated other comprehensive loss	(23		)	(3		)
Total shareholders’ equity	7,103			6,946
Total liabilities and shareholders’ equity	$	8,495		$	8,166

SCHEDULE I – CONDENSED FINANCIAL INFORMATION OF PARENT AMEREN CORPORATION CONDENSED STATEMENT OF CASH FLOWS For the Years Ended December 31, 2016, 2015, and 2014
(In millions)	2016			2015			2014
Net cash flows provided by operating activities	$	483		$	551		$	528
Cash flows from investing activities:
Money pool advances, net	(27		)	55			279
Notes receivable – affiliates, net	(60		)	(96		)	(134		)
Investments in subsidiaries	(123		)	(509		)	(280		)
Distributions from subsidiaries	—			—			215
Proceeds from note receivable – Marketing Company	—			20			95
Contributions to note receivable – Marketing Company	—			(8		)	(89		)
Other	2			(24		)	(12		)
Net cash flows provided by (used in) investing activities	(208		)	(562		)	74
Cash flows from financing activities:
Dividends on common stock	(416		)	(402		)	(390		)
Short-term debt, net	206			(284		)	217
Money pool borrowings, net	19			14			—
Maturities of long-term debt	—			—			(425		)
Issuances of long-term debt	—			700			—
Capital issuance costs	—			(6		)	—
Share-based payments	(83		)	(12		)	(14		)
Net cash flows provided by (used in) financing activities	(274		)	10			(612		)
Net change in cash and cash equivalents	$	1		$	(1	)	$	(10	)
Cash and cash equivalents at beginning of year	—			1			11
Cash and cash equivalents at end of year	$	1		$	—		$	1
Cash dividends received from consolidated subsidiaries	$	465		$	575		$	340
Noncash investing activity – investments in subsidiaries	—			(38		)	(19		)

AMEREN CORPORATION (parent company only)

NOTES TO CONDENSED FINANCIAL STATEMENTS

December 31, 2016

NOTE 1 – BASIS OF PRESENTATION

Ameren Corporation (parent company only) is a public utility holding company that conducts substantially all of its business operations through its subsidiaries. Ameren Corporation (parent company only) has accounted for its subsidiaries using the equity method. These financial statements are presented on a condensed basis.

See Note 1 – Summary of Significant Accounting Policies under Part II, Item 8, of this report for additional information. See Note 14 – Related Party Transactions under Part II, Item 8, of this report for information on the tax allocation agreement between Ameren Corporation (parent company only) and its subsidiaries.

NOTE 2 – SHORT-TERM DEBT AND LIQUIDITY

Ameren, Ameren Services, and other non-state-regulated Ameren subsidiaries have the ability, subject to Ameren parent company and applicable regulatory short-term borrowing authorizations, to access funding from the Credit Agreements and the commercial paper programs through a non-state-regulated subsidiary money pool agreement. All participants may borrow from or lend to the non-state-regulated money pool. The total amount available to pool participants from the non-state-regulated subsidiary money pool at any given time is reduced by the amount of borrowings made by participants, but is increased to the extent that the pool participants advance surplus funds to the non-state-regulated subsidiary money pool or remit funds from other external sources. The non-state-regulated subsidiary money pool was established to coordinate and to provide short-term cash and working capital for the participants. Participants receiving a loan under the non-state-regulated subsidiary money pool agreement must repay the principal amount of such loan, together with accrued interest. The rate of interest depends on the composition of internal and external funds in the non-state-regulated subsidiary money pool. Interest revenues and interest charges related to non-state-regulated money pool advances and borrowings were immaterial in 2014, 2015 and 2016.

Ameren Corporation (parent company only) had a total of $51 million in guarantees outstanding, primarily for ATXI, that were not recorded on its December 31, 2016 balance sheet. The ATXI guarantees were issued to local governments as assurance for potential remediation of damage caused by ATXI construction.

See Note 4 – Short-term Debt and Liquidity under Part II, Item 8, of this report for a description and details of short-term debt and liquidity needs of Ameren Corporation (parent company only).

NOTE 3 – LONG-TERM OBLIGATIONS

See Note 5 – Long-term Debt and Equity Financings under Part II, Item 8, of this report for additional information on Ameren Corporation's (parent company only) long-term debt, indenture provisions, and restricted cash balance.

NOTE 4 – COMMITMENTS AND CONTINGENCIES

See Note 15 – Commitments and Contingencies under Part II, Item 8, of this report for a description of all material contingencies of Ameren Corporation (parent company only).

NOTE 5 – DIVESTITURE TRANSACTIONS AND DISCONTINUED OPERATIONS

See Note 1 – Summary of Significant Accounting Policies under Part II, Item 8, of this report for information regarding the divestiture transactions and discontinued operations.