Retirement Benefits and Trusteed Assets (Tables)

3 Months Ended

Mar. 31, 2022

Retirement Benefits [Abstract]

Schedule of Net Periodic Benefit Costs (Credits)

The following tables detail the components of net periodic benefit costs (credits) for pension benefits and other postretirement benefits for DTE Energy:

	Pension Benefits				Other Postretirement Benefits
	Three Months Ended March 31,
	2022		2021		2022		2021
	(In millions)
Service cost	$	24	$	27	$	7	$	8
Interest cost	41		39		12		11
Expected return on plan assets	(87)		(84)		(32)		(32)
Amortization of:
Net actuarial loss	29		49		1		3
Prior service credit	—		—		(5)		(5)
Net periodic benefit cost (credit)	$	7	$	31	$	(17)	$	(15)

The following tables detail the components of net periodic benefit costs (credits) for other postretirement benefits for DTE Electric:

	Three Months Ended March 31,
	2022		2021
	(In millions)
Service cost	$	5	$	6
Interest cost	9		8
Expected return on plan assets	(21)		(22)
Amortization of:
Net actuarial loss	1		3
Prior service credit	(3)		(3)
Net periodic benefit credit	$	(9)	$	(8)