Other Income And Expenses (Tables)

9 Months Ended

Sep. 30, 2011

Other Income And Expenses [Abstract]

Other Income And Expenses

	Three Months				Nine Months
	2011		2010		2011		2010
Ameren:(a)
Miscellaneous income:
Allowance for equity funds used during construction	$	10	$	14	$	25	$	40
Interest income on industrial development revenue bonds		7		7		21		21
Interest and dividend income		1		2		3		4
Other		-		1		2		5
Total miscellaneous income	$	18	$	24	$	51	$	70
Miscellaneous expense:
Donations	$	1	$	7	$	4	$	10
Other		4		3		11		9
Total miscellaneous expense	$	5	$	10	$	15	$	19
Ameren Missouri:
Miscellaneous income:
Allowance for equity funds used during construction	$	8	$	13	$	22	$	38
Interest income on industrial development revenue bonds		7		7		21		21
Interest and dividend income		-		2		1		3
Other		1		1		1		2
Total miscellaneous income	$	16	$	23	$	45	$	64
Miscellaneous expense:
Donations	$	1	$	7	$	3	$	8
Other		1		1		5		3
Total miscellaneous expense	$	2	$	8	$	8	$	11
Ameren Illinois:
Miscellaneous income:
Allowance for equity funds used during construction	$	2	$	-	$	3	$	1
Interest and dividend income		-		1		-		2
Other		-		1		2		3
Total miscellaneous income	$	2	$	2	$	5	$	6
Miscellaneous expense:
Donations	$	1	$	1	$	1	$	2
Other		1		1		3		4
Total miscellaneous expense	$	2	$	2	$	4	$	6
Genco:
Miscellaneous income:
Other	$	1	$	-	$	1	$	1
Total miscellaneous income	$	1	$	-	$	1	$	1
Miscellaneous expense:
Other	$	-	$	-	$	-	$	1
Total miscellaneous expense	$	-	$	-	$	-	$	1

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.