Retirement Benefits (Tables)

3 Months Ended

Mar. 31, 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 March 31	2022			2021			2022			2021
CMS Energy, including Consumers
Net periodic cost (credit)
Service cost		$	12		$	14		$	4		$	4
Interest cost		18			15			7			6
Expected return on plan assets		(52)			(52)			(29)			(27)
Amortization of:
Net loss		17			25			—			2
Prior service cost (credit)		1			1			(12)			(13)
Settlement loss		2			1			—			—
Net periodic cost (credit)		$	(2)		$	4		$	(30)		$	(28)
Consumers
Net periodic cost (credit)
Service cost		$	12		$	13		$	4		$	4
Interest cost		16			14			7			6
Expected return on plan assets		(49)			(49)			(27)			(25)
Amortization of:
Net loss		16			25			—			2
Prior service cost (credit)		1			1			(12)			(13)
Settlement loss		2			1			—			—
Net periodic cost (credit)		$	(2)		$	5		$	(28)		$	(26)

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 March 31	2022			2021			2022			2021
CMS Energy, including Consumers
Net periodic cost (credit)
Service cost		$	12		$	14		$	4		$	4
Interest cost		18			15			7			6
Expected return on plan assets		(52)			(52)			(29)			(27)
Amortization of:
Net loss		17			25			—			2
Prior service cost (credit)		1			1			(12)			(13)
Settlement loss		2			1			—			—
Net periodic cost (credit)		$	(2)		$	4		$	(30)		$	(28)
Consumers
Net periodic cost (credit)
Service cost		$	12		$	13		$	4		$	4
Interest cost		16			14			7			6
Expected return on plan assets		(49)			(49)			(27)			(25)
Amortization of:
Net loss		16			25			—			2
Prior service cost (credit)		1			1			(12)			(13)
Settlement loss		2			1			—			—
Net periodic cost (credit)		$	(2)		$	5		$	(28)		$	(26)