Schedule II - Valuation And Qualifying Accounts

12 Months Ended

Dec. 31, 2014

Valuation and Qualifying Accounts [Abstract]

Valuation And Qualifying Accounts

SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS FOR THE YEARS ENDED DECEMBER 31, 2014, 2013, AND 2012
(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:
2014	$	18	$	36	$	4	$	37	$	21
2013	17		35		4		38		18
2012	20		30		2		35		17
Deferred tax valuation allowance:
2014	$	7	$	3	$	—	$	—	$	10
2013	2		5		—		—		7
2012	1		1		—		—		2
Ameren Missouri:
Deducted from assets – allowance for doubtful accounts:
2014	$	5	$	16	$	—	$	13	$	8
2013	5		16		—		16		5
2012	7		11		—		13		5
Deferred tax valuation allowance:
2014	$	1	$	—	$	—	$	—	$	1
2013	1		—		—		—		1
2012	1		—		—		—		1
Ameren Illinois:
Deducted from assets – allowance for doubtful accounts:
2014	$	13	$	20	$	4	$	24	$	13
2013	12		19		4		22		13
2012	13		19		2		22		12
Deferred tax valuation allowance:
2014	$	1	$	—	$	—	$	—	$	1
2013	1		—		—		—		1
2012	—		1		—		—		1

(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.