Retirement Benefits

3 Months Ended

Mar. 31, 2017

Retirement Benefits

8:Retirement Benefits

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

CMS Energy and Consumers elected to adopt ASU2017‑07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, as of January1,2017.  For further details on the implementation of this standard, see Note1, New Accounting Standards.

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 Plan						OPEB Plan
Three Months Ended March 31	2017			2016			2017			2016
CMS Energy, including Consumers
Net periodic cost (credit)
Service cost		$	11		$	11		$	5		$	5
Interest cost			22			21			13			12
Expected return on plan assets			(38)			(37)			(22)			(22)
Amortization of:
Net loss			20			17			8			5
Prior service cost (credit)			1			1			(9)			(10)
Net periodic cost (credit)		$	16		$	13		$	(5)		$	(10)
Consumers
Net periodic cost (credit)
Service cost		$	11		$	10		$	5		$	4
Interest cost			21			21			13			11
Expected return on plan assets			(37)			(36)			(21)			(20)
Amortization of:
Net loss			20			17			8			6
Prior service cost (credit)			1			1			(9)			(10)
Net periodic cost (credit)		$	16		$	13		$	(4)		$	(9)

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.

CMS Energy and Consumers elected to adopt ASU2017‑07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, as of January1,2017.  For further details on the implementation of this standard, see Note1, New Accounting Standards.

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 Plan						OPEB Plan
Three Months Ended March 31	2017			2016			2017			2016
CMS Energy, including Consumers
Net periodic cost (credit)
Service cost		$	11		$	11		$	5		$	5
Interest cost			22			21			13			12
Expected return on plan assets			(38)			(37)			(22)			(22)
Amortization of:
Net loss			20			17			8			5
Prior service cost (credit)			1			1			(9)			(10)
Net periodic cost (credit)		$	16		$	13		$	(5)		$	(10)
Consumers
Net periodic cost (credit)
Service cost		$	11		$	10		$	5		$	4
Interest cost			21			21			13			11
Expected return on plan assets			(37)			(36)			(21)			(20)
Amortization of:
Net loss			20			17			8			6
Prior service cost (credit)			1			1			(9)			(10)
Net periodic cost (credit)		$	16		$	13		$	(4)		$	(9)