Schedule I - Condensed Financial Information Of Parent

12 Months Ended

Dec. 31, 2015

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, 2015, 2014, and 2013
(In millions)	2015			2014			2013
Operating revenues	$	—		$	—		$	—
Operating expenses	14			11			26
Operating loss	(14		)	(11		)	(26		)
Equity in earnings of subsidiaries	600			607			546
Interest income from affiliates	6			3			3
Total other income (expense), net	(5		)	2			(5		)
Interest charges	3			16			42
Income tax (benefit)	5			(2		)	(36		)
Net Income Attributable to Ameren Common Shareholders – Continuing Operations	579			587			512
Net Income (Loss) Attributable to Ameren Common Shareholders  – Discontinued Operations	51			(1		)	(223		)
Net Income Attributable to Ameren Common Shareholders	$	630		$	586		$	289
Net Income Attributable to Ameren Common Shareholders – Continuing Operations	$	579		$	587		$	512
Other Comprehensive Income, Net of Taxes:
Pension and other postretirement benefit plan activity, net of income taxes (benefit) of $3, $(7), and $16, respectively	6			(12		)	30
Comprehensive Income from Continuing Operations Attributable to Ameren Common Shareholders	585			575			542
Net Income (Loss) Attributable to Ameren Common Shareholders – Discontinued Operations	51			(1		)	(223		)
Other Comprehensive Loss from Discontinued Operations, Net of Income taxes	—			—			(19		)
Comprehensive Income (Loss) from Discontinued Operations Attributable to Ameren Common Shareholders	51			(1		)	(242		)
Comprehensive Income Attributable to Ameren Common Shareholders	$	636		$	574		$	300

SCHEDULE I – CONDENSED FINANCIAL INFORMATION OF PARENT AMEREN CORPORATION CONDENSED BALANCE SHEET
(In millions)	December 31, 2015			December 31, 2014
Assets:
Cash and cash equivalents	$	—		$	1
Advances to money pool	—			55
Accounts receivable – affiliates	53			28
Notes receivable – affiliates	—			94
Miscellaneous accounts and notes receivable	3			39
Other current assets	9			14
Total current assets	65			231
Investments in subsidiaries – continuing operations	7,231			6,680
Investment in subsidiary – discontinued operations	(4		)	(4		)
Note receivable – ATXI	290			100
Accumulated deferred income taxes, net	426			407
Other assets	158			152
Total assets	$	8,166		$	7,566
Liabilities and Shareholders’ Equity:
Short-term debt	301			585
Borrowings from money pool	14			—
Accounts payable – affiliates	75			88
Other current liabilities	22			52
Total current liabilities	412			725
Long-term debt	694			—
Pension and other postretirement benefits	33			47
Other deferred credits and liabilities	81			81
Total liabilities	1,220			853
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	5,616			5,617
Retained earnings	1,331			1,103
Accumulated other comprehensive loss	(3		)	(9		)
Total shareholders’ equity	6,946			6,713
Total liabilities and shareholders’ equity	$	8,166		$	7,566

SCHEDULE I – CONDENSED FINANCIAL INFORMATION OF PARENT AMEREN CORPORATION CONDENSED STATEMENT OF CASH FLOWS For the Years Ended December 31, 2015, 2014, and 2013
(In millions)	2015			2014			2013
Net cash flows provided by operating activities	$	537		$	514		$	453
Cash flows from investing activities:
Money pool advances, net	55			279			(371		)
Notes receivable – affiliates, net	(96		)	(134		)	(23		)
Investments in subsidiaries	(509		)	(280		)	(50		)
Distributions from subsidiaries	—			215			1
Proceeds from note receivable – Marketing Company	20			95			6
Contributions to note receivable – Marketing Company	(8		)	(89		)	(5		)
Other	(24		)	(12		)	(3		)
Net cash flows provided by (used in) investing activities	(562		)	74			(445		)
Cash flows from financing activities:
Dividends on common stock	(402		)	(390		)	(388		)
Short-term debt, net	(284		)	217			368
Money pool borrowings, net	14			—			—
Maturities of long-term debt	—			(425		)	—
Issuances of long-term debt	700			—			—
Capital issuance costs	(6		)	—			—
Other	2			—			—
Net cash flows provided by (used in) financing activities	24			(598		)	(20		)
Net change in cash and cash equivalents	$	(1	)	$	(10	)	$	(12	)
Cash and cash equivalents at beginning of year	1			11			23
Cash and cash equivalents at end of year	$	—		$	1		$	11
Cash dividends received from consolidated subsidiaries	$	575		$	340		$	570
Noncash investing activity – divestiture	$	—		$	—		$	494
Noncash investing activity – investments in subsidiaries	(38		)	(19		)	—

AMEREN CORPORATION (parent company only)

NOTES TO CONDENSED FINANCIAL STATEMENTS

December 31, 2015

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. In accordance with authoritative accounting guidance, Ameren Corporation (parent company only) has accounted for wholly owned 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.

Accounting Changes and Other Matters

Presentation of Debt Issuance Costs

During 2015, the FASB issued authoritative accounting guidance requiring debt issuance costs to be presented as a reduction to the associated debt liability. Previously, debt issuance costs were presented in "Other assets" on Ameren Corporation's (parent company only) balance sheet. Ameren Corporation (parent company only) early adopted this standard in 2015. Retrospective application of the new guidance had no impact on Ameren Corporation's (parent company only) balance sheet at December 31, 2014. See Note 5 – Long-term Debt and Equity Financings under Part II, Item 8, of this report for additional information.

Balance Sheet Classification of Deferred Income Taxes

During 2015, the FASB issued authoritative accounting guidance requiring all deferred tax assets and liabilities, along with any related valuation allowances, to be classified as noncurrent on the balance sheet. Previously, the current portion of deferred taxes was presented as "Current accumulated deferred income taxes, net" and the noncurrent portion of deferred taxes was presented as "Accumulated deferred income taxes, net" on Ameren Corporation's (parent company only) balance sheet. Ameren Corporation (parent company only) early adopted this standard in 2015 and applied the guidance retrospectively. At December 31, 2014, the current portion of deferred income taxes of $143 million previously presented as "Current accumulated deferred income taxes, net" on Ameren Corporation's (parent company only) balance sheet was reclassified and presented in "Accumulated deferred income taxes, net" for comparative purposes.

Additional disclosures relating to the parent company financial statements are included within the combined notes under Part II, Item 8, of this report. See Note 1 – Summary of Significant Accounting Policies and 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 and 2015.

Ameren Corporation (parent company only) had a total of $36 million in guarantees outstanding primarily for ATXI that were not recorded on its December 31, 2015 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

In November 2015, Ameren Corporation (parent company only) issued $350 million of 2.70% senior unsecured notes due November 15, 2020, with interest payable semiannually on May 15 and November 15 of each year, beginning May 15, 2016. Ameren (parent) received proceeds of $348 million, which were used to repay a portion of short-term debt.

In November 2015, Ameren Corporation (parent company only) issued $350 million of 3.65% senior unsecured notes due February 15, 2026, with interest payable semiannually on February 15 and August 15 of each year, beginning February 15, 2016. Ameren (parent) received proceeds of $347 million, which were used to repay a portion of short-term debt.

In May 2014, Ameren Corporation (parent company only) repaid at maturity $425 million of its 8.875% senior unsecured notes, plus accrued interest. The notes were repaid with proceeds from commercial paper issuances.

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.

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

On December 2, 2013, Ameren completed the divestiture of New AER to IPH in accordance with the transaction agreement between Ameren and IPH dated March 14, 2013, as amended by a letter agreement dated December 2, 2013. As a result of the divestiture in 2013, Ameren Corporation (parent company only) recorded a pretax loss on disposal of $201 million. This charge was included within "Net Loss Attributable to Ameren Common Shareholders – Discontinued Operations" in the Ameren Corporation (parent company only) Condensed Statement of Income (Loss) and Comprehensive Income (Loss) for the year ended December 31, 2013.

During 2015, based on the completion of the IRS audit, Ameren Corporation (parent company only) removed a $53 million reserve for unrecognized tax benefits recorded in 2013 and recognized a tax benefit from discontinued operations. See Note 13 – Income Taxes under Part II, Item 8, of this reportfor additional information regarding Ameren Corporation's (parent company only) uncertain tax positions.

In 2015, Ameren paid $25 million related to a previously-recorded liability pursuant to the transaction agreement between Ameren and IPH with no resulting additional impact to its results of operations.

See Note 16 – Divestiture Transactions and Discontinued Operations under Part II, Item 8, of this report for additional information regarding the divestiture transactions and discontinued operations.