Retirement Benefits (Tables)

3 Months Ended

Mar. 31, 2020

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 benefits plans:

In Millions
	DB Pension Plans								OPEB Plan
Three Months Ended March 31	2020				2019				2020				2019
CMS Energy, including Consumers
Net periodic cost (credit)
Service cost		$	12			$	10			$	4			$	4
Interest cost		21				25				8				10
Expected return on plan assets		(48		)		(40		)		(25		)		(22		)
Amortization of:
Net loss		22				12				4				7
Prior service credit		—				—				(14		)		(16		)
Net periodic cost (credit)		$	7			$	7			$	(23	)		$	(17	)
Consumers
Net periodic cost (credit)
Service cost		$	12			$	10			$	4			$	3
Interest cost		20				23				8				10
Expected return on plan assets		(45		)		(38		)		(23		)		(21		)
Amortization of:
Net loss		21				12				4				7
Prior service credit		—				—				(14		)		(15		)
Net periodic cost (credit)		$	8			$	7			$	(21	)		$	(16	)

Contributions: In January 2020, CMS Energy, including Consumers, contributed $531 million and Consumers contributed $518 million to the DB Pension Plans.

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 benefits plans:

In Millions
	DB Pension Plans								OPEB Plan
Three Months Ended March 31	2020				2019				2020				2019
CMS Energy, including Consumers
Net periodic cost (credit)
Service cost		$	12			$	10			$	4			$	4
Interest cost		21				25				8				10
Expected return on plan assets		(48		)		(40		)		(25		)		(22		)
Amortization of:
Net loss		22				12				4				7
Prior service credit		—				—				(14		)		(16		)
Net periodic cost (credit)		$	7			$	7			$	(23	)		$	(17	)
Consumers
Net periodic cost (credit)
Service cost		$	12			$	10			$	4			$	3
Interest cost		20				23				8				10
Expected return on plan assets		(45		)		(38		)		(23		)		(21		)
Amortization of:
Net loss		21				12				4				7
Prior service credit		—				—				(14		)		(15		)
Net periodic cost (credit)		$	8			$	7			$	(21	)		$	(16	)

Contributions: In January 2020, CMS Energy, including Consumers, contributed $531 million and Consumers contributed $518 million to the DB Pension Plans.