Other Income and Expenses (Tables)

3 Months Ended

Mar. 31, 2018

Other Nonoperating Income (Expense) [Abstract]

Other Income And Expenses

The following table presents the components of “Other Income, Net” in the Ameren Companies’ statements of income for the three months ended March 31, 2018 and 2017:

	Three Months
	2018				2017
Ameren:(a)
Other Income, Net
Allowance for equity funds used during construction	$	5			$	6
Interest income on industrial development revenue bonds	6				7
Interest income	2				2
Non-service cost components of net periodic benefit income	16			(b)	12
Other income	1				—
Donations	(5		)		(5		)
Other expense	(2		)		(4		)
Total Other Income, Net	$	23			$	18
Ameren Missouri:
Other Income, Net
Allowance for equity funds used during construction	$	4			$	5
Interest income on industrial development revenue bonds	6				7
Non-service cost components of net periodic benefit income	5			(b)	6
Other income	1				—
Donations	(1		)		—
Other expense	(2		)		(2		)
Total Other Income, Net	$	13			$	16
Ameren Illinois:
Other Income, Net
Allowance for equity funds used during construction	$	1			$	1
Interest income	2				2
Non-service cost components of net periodic benefit income	7				3
Donations	(4		)		(4		)
Other expense	—				(2		)
Total Other Income, Net	$	6			$	—

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

(b) For the three months ended March 31, 2018, the non-service cost components of net periodic benefit income were partially offset by a $4 million deferral due to a regulatory tracking mechanism for the difference between the level of such costs incurred by Ameren Missouri under GAAP and the level of such costs included in rates.