Schedule II - Valuation And Qualifying Accounts

12 Months Ended

Dec. 31, 2013

Valuation and Qualifying Accounts [Abstract]

Valuation And Qualifying Accounts

SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS FOR THE YEARS ENDED DECEMBER 31, 2013, 2012 AND 2011
(in millions)
Column A	Column B		Column C				Column D		Column E
Description	Balance at Beginning of Period		(1) Charged to Costs and Expenses		(2) Charged to Other Accounts(a)		Deductions(b)		Balance at End of Period
Ameren:
Deducted from assets – allowance for doubtful accounts:
2013	$	17	$	35	$	4	$	38	$	18
2012	20		30		2		35		17
2011	23		41		—		44		20
Deferred tax valuation allowance:
2013	$	2	$	5	$	—	$	—	$	7
2012	1		1		—		—		2
2011	1		—		—		—		1
Ameren Missouri:
Deducted from assets – allowance for doubtful accounts:
2013	$	5	$	16	$	—	$	16	$	5
2012	7		11		—		13		5
2011	8		17		—		18		7
Deferred tax valuation allowance:
2013	$	1	$	—	$	—	$	—	$	1
2012	1		—		—		—		1
2011	1		—		—		—		1
Ameren Illinois:
Deducted from assets – allowance for doubtful accounts:
2013	$	12	$	19	$	4	$	22	$	13
2012	13		19		2		22		12
2011	13		24		—		24		13
Deferred tax valuation allowance:
2013	$	1	$	—	$	—	$	—	$	1
2012	—		1		—		—		1
2011	—		—		—		—		—

(a) Uncollectible account reserve associated with receivables purchased by Ameren Illinois from alternative retail electric suppliers, as required by the Illinois Public Utilities Act.

(b) Uncollectible accounts charged off, less recoveries.