Retirement Benefits (Tables)

9 Months Ended

Sep. 30, 2022

Defined Benefit Plan Disclosure [Line Items]

Schedule Of Net Benefit Costs

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 benefit plans:

In Millions
	DB Pension Plans												OPEB Plan
	Three Months Ended						Nine Months Ended						Three Months Ended						Nine Months Ended
September 30	2022			2021			2022			2021			2022			2021			2022			2021
CMS Energy, including Consumers
Net periodic cost (credit)
Service cost		$	9		$	14		$	32		$	41		$	4		$	5		$	13		$	14
Interest cost		21			14			59			44			7			6			21			17
Expected return on plan assets		(51)			(51)			(155)			(155)			(29)			(28)			(87)			(82)
Amortization of:
Net loss		5			25			32			76			—			2			1			6
Prior service cost (credit)		1			1			3			3			(12)			(14)			(38)			(40)
Settlement loss		2			1			6			4			—			—			—			—
Net periodic cost (credit)		$	(13)		$	4		$	(23)		$	13		$	(30)		$	(29)		$	(90)		$	(85)
Consumers
Net periodic cost (credit)
Service cost		$	9		$	14		$	32		$	40		$	4		$	4		$	13		$	13
Interest cost		20			14			56			42			6			6			20			17
Expected return on plan assets		(48)			(49)			(147)			(147)			(26)			(26)			(80)			(77)
Amortization of:
Net loss		5			24			30			73			—			2			—			6
Prior service cost (credit)		1			1			3			3			(13)			(12)			(38)			(38)
Settlement loss		2			1			6			4			—			—			—			—
Net periodic cost (credit)		$	(11)		$	5		$	(20)		$	15		$	(29)		$	(26)		$	(85)		$	(79)

Consumers Energy Company

Defined Benefit Plan Disclosure [Line Items]

Schedule Of Net Benefit Costs

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 benefit plans:

In Millions
	DB Pension Plans												OPEB Plan
	Three Months Ended						Nine Months Ended						Three Months Ended						Nine Months Ended
September 30	2022			2021			2022			2021			2022			2021			2022			2021
CMS Energy, including Consumers
Net periodic cost (credit)
Service cost		$	9		$	14		$	32		$	41		$	4		$	5		$	13		$	14
Interest cost		21			14			59			44			7			6			21			17
Expected return on plan assets		(51)			(51)			(155)			(155)			(29)			(28)			(87)			(82)
Amortization of:
Net loss		5			25			32			76			—			2			1			6
Prior service cost (credit)		1			1			3			3			(12)			(14)			(38)			(40)
Settlement loss		2			1			6			4			—			—			—			—
Net periodic cost (credit)		$	(13)		$	4		$	(23)		$	13		$	(30)		$	(29)		$	(90)		$	(85)
Consumers
Net periodic cost (credit)
Service cost		$	9		$	14		$	32		$	40		$	4		$	4		$	13		$	13
Interest cost		20			14			56			42			6			6			20			17
Expected return on plan assets		(48)			(49)			(147)			(147)			(26)			(26)			(80)			(77)
Amortization of:
Net loss		5			24			30			73			—			2			—			6
Prior service cost (credit)		1			1			3			3			(13)			(12)			(38)			(38)
Settlement loss		2			1			6			4			—			—			—			—
Net periodic cost (credit)		$	(11)		$	5		$	(20)		$	15		$	(29)		$	(26)		$	(85)		$	(79)