Other Income and Expenses

3 Months Ended

Mar. 31, 2013

Other Nonoperating Income (Expense) [Abstract]

OTHER INCOME AND EXPENSES

OTHER INCOME AND EXPENSES

The following table presents the components of “Other Income and Expenses” in the Ameren Companies’ statements of income (loss) for the three months ended March 31, 2013, and 2012:

	Three Months
	2013		2012
Ameren:(a)
Miscellaneous income:
Allowance for equity funds used during construction	$	8	$	9
Interest income on industrial development revenue bonds	7		7
Other	—		1
Total miscellaneous income	$	15	$	17
Miscellaneous expense:
Donations	$	4	$	12	(b)
Other	4		3
Total miscellaneous expense	$	8	$	15
Ameren Missouri:
Miscellaneous income:
Allowance for equity funds used during construction	$	7	$	8
Interest income on industrial development revenue bonds	7		7
Total miscellaneous income	$	14	$	15
Miscellaneous expense:
Donations	$	2	$	2
Other	3		1
Total miscellaneous expense	$	5	$	3
Ameren Illinois:
Miscellaneous income:
Allowance for equity funds used during construction	$	1	$	1
Total miscellaneous income	$	1	$	1
Miscellaneous expense:
Donations	$	3	$	10	(b)
Other	—		1
Total miscellaneous expense	$	3	$	11

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

(b) Includes Ameren Illinois’ one-time $7.5 million donation to the Illinois Science and Energy Innovation Trust pursuant to the IEIMA as a result of Ameren Illinois’ 2012 participation in the formula ratemaking process.