Retirement Benefits

6 Months Ended

Jun. 30, 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						Six Months Ended						Three Months Ended						Six Months Ended
June 30	2017			2016			2017			2016			2017			2016			2017			2016
CMS Energy, including Consumers
Net periodic cost (credit)
Service cost		$	11		$	10		$	22		$	21		$	5		$	4		$	10		$	9
Interest cost			22			22			44			43			13			11			26			23
Expected return on plan assets			(38)			(37)			(76)			(74)			(23)			(21)			(45)			(43)
Amortization of:
Net loss			20			18			40			35			8			6			16			11
Prior service cost (credit)			1			1			2			2			(9)			(11)			(18)			(21)
Net periodic cost (credit)		$	16		$	14		$	32		$	27		$	(6)		$	(11)		$	(11)		$	(21)
Consumers
Net periodic cost (credit)
Service cost		$	11		$	10		$	22		$	20		$	4		$	5		$	9		$	9
Interest cost			22			21			43			42			13			11			26			22
Expected return on plan assets			(37)			(36)			(74)			(72)			(21)			(20)			(42)			(40)
Amortization of:
Net loss			19			17			39			34			8			5			16			11
Prior service cost (credit)			1			1			2			2			(8)			(10)			(17)			(20)
Net periodic cost (credit)		$	16		$	13		$	32		$	26		$	(4)		$	(9)		$	(8)		$	(18)

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						Six Months Ended						Three Months Ended						Six Months Ended
June 30	2017			2016			2017			2016			2017			2016			2017			2016
CMS Energy, including Consumers
Net periodic cost (credit)
Service cost		$	11		$	10		$	22		$	21		$	5		$	4		$	10		$	9
Interest cost			22			22			44			43			13			11			26			23
Expected return on plan assets			(38)			(37)			(76)			(74)			(23)			(21)			(45)			(43)
Amortization of:
Net loss			20			18			40			35			8			6			16			11
Prior service cost (credit)			1			1			2			2			(9)			(11)			(18)			(21)
Net periodic cost (credit)		$	16		$	14		$	32		$	27		$	(6)		$	(11)		$	(11)		$	(21)
Consumers
Net periodic cost (credit)
Service cost		$	11		$	10		$	22		$	20		$	4		$	5		$	9		$	9
Interest cost			22			21			43			42			13			11			26			22
Expected return on plan assets			(37)			(36)			(74)			(72)			(21)			(20)			(42)			(40)
Amortization of:
Net loss			19			17			39			34			8			5			16			11
Prior service cost (credit)			1			1			2			2			(8)			(10)			(17)			(20)
Net periodic cost (credit)		$	16		$	13		$	32		$	26		$	(4)		$	(9)		$	(8)		$	(18)