XML 59 R42.htm IDEA: XBRL DOCUMENT v3.26.3
Retirement Benefits and Trusteed Assets (Tables)
 9 Months Ended
Sep. 30, 2026
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 BenefitsOther Postretirement Benefits
2026202520262025
(In millions)
Three Months Ended September 30,
Service cost$13 $12 $4 $4 
Interest cost53 54 15 15 
Expected return on plan assets(72)(73)(29)(29)
Amortization of:
Net actuarial loss24 22 — — 
Prior service credit— (1)— — 
Net periodic benefit cost (credit)$18 $14 $(10)$(10)
Pension BenefitsOther Postretirement Benefits
2026202520262025
Nine Months Ended September 30,
Service cost$38 $36 $11 $11 
Interest cost158 162 45 46 
Expected return on plan assets(215)(218)(89)(88)
Amortization of:
Net actuarial loss73 66 1 1 
Prior service credit(1)(1)— — 
Net periodic benefit cost (credit)$53 $45 $(32)$(30)
The following table details the components of net periodic benefit costs (credits) for other postretirement benefits for DTE Electric:
Three Months Ended September 30,Nine Months Ended September 30,
2026202520262025
(In millions)
Service cost$3 $2 $8 $8 
Interest cost11 11 34 34 
Expected return on plan assets(19)(20)(58)(58)
Amortization of:
Net actuarial gain(1)(1)(3)(2)
Net periodic benefit credit$(6)$(8)$(19)$(18)