Divestiture Transactions and Discontinued Operations (Tables)

6 Months Ended

Jun. 30, 2014

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures

The following table presents the carrying amounts of the components of assets and liabilities segregated on Ameren's consolidated balance sheets as discontinued operations at June 30, 2014, and December 31, 2013:

	June 30, 2014		December 31, 2013
Assets of discontinued operations
Cash and cash equivalents	$	—	$	—
Accounts receivable and unbilled revenue	—		5
Materials and supplies	—		5
Property and plant, net	—		142
Accumulated deferred income taxes, net(a)	15		13
Total assets of discontinued operations	$	15	$	165
Liabilities of discontinued operations
Accounts payable and other current obligations	$	1	$	5
Asset retirement obligations(b)	32		40
Total liabilities of discontinued operations	$	33	$	45

(a) Includes income tax assets related to the abandoned Meredosia and Hutsonville energy centers.

(b) Includes AROs associated with the abandoned Meredosia and Hutsonville energy centers of $32 million and $31 million, respectively, at June 30, 2014, and December 31, 2013.

The following table presents the components of discontinued operations in Ameren's consolidated statement of income (loss) for the three and six months ended June 30, 2014, and 2013:

	Three Months						Six Months
	2014			2013			2014			2013
Operating revenues	$	—		$	303		$	1		$	567
Operating expenses	(1		)	(310		)	(3		)	(725		)	(a)
Operating loss	(1		)	(7		)	(2		)	(158		)
Other income (loss)	—			1			—			(1		)
Interest charges	—			(11		)	—			(22		)
Loss before income taxes	(1		)	(17		)	(2		)	(181		)
Income tax (expense) benefit	—			7			—			(28		)
Loss from discontinued operations, net of taxes	$	(1	)	$	(10	)	$	(2	)	$	(209	)

(a) Included a noncash pretax asset impairment charge of $168 million for the six months ended June 30, 2013, to reduce the carrying value of the New AER disposal group to its estimated fair value less cost to sell.