Retirement Benefits

3 Months Ended

Mar. 31, 2018

Retirement Benefits

8:Retirement Benefits

CMS Energy and Consumers provide pension, OPEB, and other retirement benefits to employees under a number of different plans.

In November 2017, CMS Energy and Consumers approved certain amendments to the OPEB Plan, resulting in higher OPEB Plan credits in 2018 compared to 2017. Presented in the following table are the costs (credits) and other changes in plan assets and benefit obligations incurred in CMS Energy’s and Consumers’ retirement benefits plans:

In Millions
	DB Pension Plans						OPEB Plan
Three Months Ended March 31	2018			2017			2018			2017
CMS Energy, including Consumers
Net periodic cost (credit)
Service cost		$	12		$	11		$	4		$	5
Interest cost			22			22			9			13
Expected return on plan assets			(37)			(38)			(24)			(22)
Amortization of:
Net loss			18			20			4			8
Prior service cost (credit)			1			1			(17)			(9)
Net periodic cost (credit)		$	16		$	16		$	(24)		$	(5)
Consumers
Net periodic cost (credit)
Service cost		$	12		$	11		$	4		$	5
Interest cost			21			21			8			13
Expected return on plan assets			(35)			(37)			(23)			(21)
Amortization of:
Net loss			18			20			4			8
Prior service cost (credit)			1			1			(16)			(9)
Net periodic cost (credit)		$	17		$	16		$	(23)		$	(4)

Consumers Energy Company [Member]

Retirement Benefits

8:Retirement Benefits

CMS Energy and Consumers provide pension, OPEB, and other retirement benefits to employees under a number of different plans.

In November 2017, CMS Energy and Consumers approved certain amendments to the OPEB Plan, resulting in higher OPEB Plan credits in 2018 compared to 2017. Presented in the following table are the costs (credits) and other changes in plan assets and benefit obligations incurred in CMS Energy’s and Consumers’ retirement benefits plans:

In Millions
	DB Pension Plans						OPEB Plan
Three Months Ended March 31	2018			2017			2018			2017
CMS Energy, including Consumers
Net periodic cost (credit)
Service cost		$	12		$	11		$	4		$	5
Interest cost			22			22			9			13
Expected return on plan assets			(37)			(38)			(24)			(22)
Amortization of:
Net loss			18			20			4			8
Prior service cost (credit)			1			1			(17)			(9)
Net periodic cost (credit)		$	16		$	16		$	(24)		$	(5)
Consumers
Net periodic cost (credit)
Service cost		$	12		$	11		$	4		$	5
Interest cost			21			21			8			13
Expected return on plan assets			(35)			(37)			(23)			(21)
Amortization of:
Net loss			18			20			4			8
Prior service cost (credit)			1			1			(16)			(9)
Net periodic cost (credit)		$	17		$	16		$	(23)		$	(4)