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Retirement Benefits and Trusteed Assets (Tables)
 12 Months Ended
Dec. 31, 2025
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Schedule of Pension and Other Postretirement Benefit Plans and Accumulated Benefit Obligation
The table below represents the pension and other postretirement benefit plans of each Registrant at December 31, 2025:
Registrants
DTE EnergyDTE Electric
Qualified Pension Plans
DTE Energy Company Retirement PlanXX
DTE Gas Company Retirement Plan for Employees Covered by Collective Bargaining AgreementsX
Shenango Inc. Pension Plan(a)
X
Non-qualified Pension Plans
DTE Energy Company Supplemental Retirement Plan(b)
XX
DTE Energy Company Executive Supplemental Retirement Plan(b)
XX
DTE Energy Company Supplemental Severance Benefit PlanX
Other Postretirement Benefit Plans
The DTE Energy Company Comprehensive Non-Health Welfare PlanXX
The DTE Energy Company Comprehensive Retiree Group Health Care PlanXX
DTE Supplemental Retiree Benefit PlanXX
DTE Energy Company Retiree Reimbursement Arrangement PlanXX
_____________________________________
(a)Sponsored by Shenango, LLC
(b)Sponsored by DTE Energy Company
Pension Plan  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Schedule of Pension and Other Postretirement Benefit Plans and Accumulated Benefit Obligation
The following table reconciles the obligations, assets, and funded status of the plans as well as the amounts recognized as a pension liability in DTE Energy's Consolidated Statements of Financial Position at December 31:
DTE Energy
20252024
(In millions)
Accumulated benefit obligation, end of year$3,851 $3,803 
Change in projected benefit obligation
Projected benefit obligation, beginning of year$3,982 $4,318 
Service cost49 58 
Interest cost216 208 
Actuarial (gain) loss111 (254)
Benefits paid(315)(348)
Projected benefit obligation, end of year$4,043 $3,982 
Change in plan assets
Plan assets at fair value, beginning of year$3,758 $3,960 
Actual return on plan assets343 137 
Company contributions9 9 
Benefits paid(315)(348)
Plan assets at fair value, end of year$3,795 $3,758 
Funded status$(248)$(224)
Amount recorded as:
Current liabilities$(13)$(10)
Noncurrent liabilities(235)(214)
$(248)$(224)
Amounts recognized in Accumulated other comprehensive income, pre-tax
Net actuarial loss$82 $76 
$82 $76 
Amounts recognized in Regulatory assets(a)
Net actuarial loss$1,283 $1,318 
Prior service credit(2)(3)
$1,281 $1,315 
______________________________________
(a)See Note 9 to the Consolidated Financial Statements, "Regulatory Matters."
Schedule of Net Pension Cost (Credit)
Net pension cost (credit) for DTE Energy includes the following components:
Year Ended December 31,
202520242023
(In millions)
Service cost$49 $58 $57 
Interest cost216 208 214 
Expected return on plan assets(291)(341)(352)
Amortization of:
Net actuarial loss87 59 7 
Prior service credit(1)(2)(2)
Settlements— — 7 
Net pension cost (credit)$60 $(18)$(69)
Schedule of Changes in Plan Assets and Benefit Obligations
December 31,
20252024
(In millions)
Other changes in plan assets and benefit obligations recognized in Regulatory assets and Other comprehensive income (loss)
Net actuarial (gain) loss$58 $(49)
Amortization of net actuarial loss and settlements(87)(59)
Amortization of prior service credit1 2 
Total recognized in Regulatory assets and Other comprehensive income (loss)$(28)$(106)
Total recognized in net periodic pension credit, Regulatory assets, and Other comprehensive income (loss)$32 $(124)
Schedule of Expected Benefit Payments
At December 31, 2025, the benefits related to DTE Energy's qualified and non-qualified pension plans expected to be paid in each of the next five years and in the aggregate for the five fiscal years thereafter are as follows:
(In millions)
2026$326 
2027326 
2028330 
2029326 
2030321 
2031-20351,599 
Total$3,228 
Schedule of Assumptions Used
Assumptions used in determining the projected benefit obligation and net pension costs of DTE Energy for the years ended December 31, 2025, 2024, and 2023 are:
202520242023
Projected benefit obligation
Discount rate5.43%5.65%5.00%
Rate of compensation increase3.55%3.55%3.80%
Cash balance interest crediting rate3.60%4.50%3.60%
Net pension costs
Discount rate5.65%5.00%5.19%
Rate of compensation increase3.55%3.80%3.80%
Expected long-term rate of return on plan assets7.80%8.00%7.60%
Cash balance interest crediting rate4.50%3.60%3.40%
Schedule of Target Allocations and Fair Value Measurement Amounts for Pension Plan Assets
Target allocations for DTE Energy's pension plan assets as of December 31, 2025 are listed below:
U.S. Large Capitalization (Cap) Equity Securities8 %
U.S. Small Cap and Mid Cap Equity Securities1 
Non-U.S. Equity Securities6 
Fixed Income Securities57 
Hedge Funds and Similar Investments8 
Private Equity and Other20 
100 %
The following table provides the fair value measurement amounts for DTE Energy's pension plan assets at December 31, 2025 and 2024(a):
December 31, 2025December 31, 2024
Level 1Level 2
Other(b)
TotalLevel 1Level 2
Other(b)
Total
DTE Energy asset category:(In millions)
Short-term Investments(c)
$83 $— $— $83 $97 $— $— $97 
Equity Securities
Domestic(d)
— — 343 343 — — 349 349 
International(e)
34 — 209 243 35 — 188 223 
Fixed Income Securities
Governmental(f)
537 81 — 618 627 76 — 703 
Corporate(g)
— 1,504 — 1,504 — 1,350 — 1,350 
Hedge Funds and Similar Investments(h)
138 14 172 324 137 14 167 318 
Private Equity and Other(i)
— — 680 680 — — 718 718 
DTE Energy Total$792 $1,599 $1,404 $3,795 $896 $1,440 $1,422 $3,758 
_______________________________________
(a)For a description of levels within the fair value hierarchy, see Note 12 to the Consolidated Financial Statements, "Fair Value."
(b)Amounts represent assets valued at NAV as a practical expedient for fair value.
(c)This category predominantly represents certain short-term fixed income securities and money market investments that are managed in separate accounts or commingled funds. Pricing for investments in this category is obtained from quoted prices in actively traded markets.
(d)This category represents portfolios of large, medium and small capitalization domestic equities. Investments in this category include exchange-traded securities held in a commingled fund classified as NAV assets.
(e)This category primarily consists of portfolios of non-U.S. developed and emerging market equities. Investments in this category include exchange-traded securities for which unadjusted quoted prices can be obtained and exchange-traded securities held in a commingled fund classified as NAV assets.
(f)This category includes U.S. Treasuries, bonds, and other governmental debt. Pricing for investments in this category is obtained from quoted prices in actively traded markets and quotations from broker or pricing services.
(g)This category primarily consists of corporate bonds from diversified industries, bank loans, and mortgage-backed securities. Pricing for investments in this category is obtained from quotations from broker or pricing services.
(h)This category utilizes a diversified group of strategies that attempt to capture uncorrelated sources of return and includes publicly traded mutual funds, insurance-linked and asset-backed securities, commingled funds and limited partnership funds. Pricing for mutual funds in this category is obtained from quoted prices in actively traded markets. Pricing for insurance-linked and asset-backed securities is obtained from quotations from broker or pricing services. Commingled funds and limited partnership funds are classified as NAV assets.
(i)This category includes a diversified group of funds and strategies that primarily invests in private equity partnerships. This category also includes investments in private real estate and private debt. All investments in this category are classified as NAV assets.
Other postretirement benefit plan  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Schedule of Pension and Other Postretirement Benefit Plans and Accumulated Benefit Obligation
The following table reconciles the obligations, assets, and funded status of the plans including amounts recorded as Prepaid postretirement costs or Accrued postretirement liability in the Registrants' Consolidated Statements of Financial Position at December 31:
DTE EnergyDTE Electric
2025202420252024
(In millions)
Change in accumulated postretirement benefit obligation
Accumulated postretirement benefit obligation, beginning of year$1,123 $1,283 $849 $982 
Service cost15 18 11 14 
Interest cost61 62 46 47 
Actuarial (gain) loss24 (165)15 (139)
Benefits paid(82)(75)(60)(55)
Accumulated postretirement benefit obligation, end of year$1,141 $1,123 $861 $849 
Change in plan assets
Plan assets at fair value, beginning of year$1,594 $1,614 $1,052 $1,070 
Actual return on plan assets139 58 92 40 
Benefits paid(79)(78)(57)(58)
Plan assets at fair value, end of year$1,654 $1,594 $1,087 $1,052 
Funded status$513 $471 $226 $203 
Amount recorded as:
Noncurrent assets$761 $705 $463 $428 
Current liabilities(1)(1)— — 
Noncurrent liabilities(247)(233)(237)(225)
$513 $471 $226 $203 
Amounts recognized in Accumulated other comprehensive income (loss), pre-tax
Net actuarial gain$(13)$(14)$— $— 
Amounts recognized in Regulatory assets and liabilities(a)
Net actuarial (gain) loss$64 $65 $(25)$(26)
______________________________________
(a)See Note 9 to the Consolidated Financial Statements, "Regulatory Matters."
Schedule of Net Pension Cost (Credit)
Net other postretirement credit for DTE Energy includes the following components:
Year Ended December 31,
202520242023
(In millions)
Service cost$15 $18 $17 
Interest cost61 62 65 
Expected return on plan assets(117)(120)(111)
Amortization of:
Net actuarial loss2 6 10 
Prior service credit— (10)(19)
Net other postretirement credit$(39)$(44)$(38)
Net other postretirement credit for DTE Electric includes the following components:
Year Ended December 31,
202520242023
(In millions)
Service cost$11 $14 $13 
Interest cost46 47 49 
Expected return on plan assets(77)(79)(73)
Amortization of:
Net actuarial (gain) loss(2)1 1 
Prior service credit— (6)(14)
Net other postretirement credit$(22)$(23)$(24)
Schedule of Changes in Plan Assets and Benefit Obligations
December 31,
20252024
(In millions)
Other changes in plan assets and accumulated postretirement benefit obligation recognized in Regulatory assets and liabilities and Other comprehensive income (loss)
Net actuarial (gain) loss$2 $(103)
Amortization of net actuarial loss(2)(6)
Amortization of prior service credit— 10 
Total recognized in Regulatory assets and liabilities and Other comprehensive income (loss)$— $(99)
Total recognized in net periodic benefit cost, Regulatory assets and liabilities, and Other comprehensive income (loss)$(39)$(143)
December 31,
20252024
(In millions)
Other changes in plan assets and accumulated postretirement benefit obligation recognized in Regulatory assets and liabilities
Net actuarial gain$(1)$(98)
Amortization of net actuarial gain/(loss)2 (1)
Amortization of prior service credit— 6 
Total recognized in Regulatory assets and liabilities$1 $(93)
Total recognized in net periodic benefit cost and Regulatory assets and liabilities$(21)$(116)
Schedule of Expected Benefit Payments
At December 31, 2025, the benefits expected to be paid, including prescription drug benefits, in each of the next five years and in the aggregate for the five fiscal years thereafter for the Registrants are as follows:
DTE EnergyDTE Electric
(In millions)
2026$80 $60 
202783 62 
202885 64 
202987 65 
203089 67 
2031-2035456 347 
Total$880 $665 
Schedule of Assumptions Used
Assumptions used in determining the accumulated postretirement benefit obligation and net other postretirement benefit costs of the Registrants for the years ended December 31, 2025, 2024, and 2023 are:
202520242023
Accumulated postretirement benefit obligation
Discount rate5.43%5.66%5.00%
Health care trend rate pre- and post- 65
8.25 / 8.75%
8.50 / 9.00%
7.75 / 8.25%
Ultimate health care trend rate4.50%4.50%4.50%
Year in which ultimate reached pre- and post- 65203620352035
Other postretirement benefit costs
Discount rate5.66%5.00%5.19%
Expected long-term rate of return on plan assets7.50%7.60%7.20%
Health care trend rate pre- and post- 65
8.50 / 9.00%
7.75 / 8.25%
6.75 / 7.25%
Ultimate health care trend rate4.50%4.50%4.50%
Year in which ultimate reached pre- and post- 65203520352035
Schedule of Target Allocations and Fair Value Measurement Amounts for Pension Plan Assets
Target allocations for the Registrants' other postretirement benefit plan assets as of December 31, 2025 are listed below:
U.S. Large Cap Equity Securities4 %
Non-U.S. Equity Securities3 
Fixed Income Securities62 
Hedge Funds and Similar Investments9 
Private Equity and Other22 
100 %
The following tables provide the fair value measurement amounts for the Registrants' other postretirement benefit plan assets at December 31, 2025 and 2024(a):
December 31, 2025December 31, 2024
Level 1Level 2
Other(b)
TotalLevel 1Level 2
Other(b)
Total
(In millions)
DTE Energy asset category:
Short-term Investments(c)
$37 $— $— $37 $33 $— $— $33 
Equity Securities
Domestic(d)
— — 61 61 — — 67 67 
International(e)
7 — 42 49 6 — 34 40 
Fixed Income Securities
Governmental(f)
169 37 — 206 210 34 — 244 
Corporate(g)
— 549 222 771 — 492 208 700 
Hedge Funds and Similar Investments(h)
34 3 105 142 27 3 103 133 
Private Equity and Other(i)
— — 388 388 — — 377 377 
DTE Energy Total$247 $589 $818 $1,654 $276 $529 $789 $1,594 
DTE Electric asset category:
Short-term Investments(c)
$24 $— $— $24 $21 $— $— $21 
Equity Securities
Domestic(d)
— — 38 38 — — 42 42 
International(e)
4 — 27 31 4 — 22 26 
Fixed Income Securities
Governmental(f)
110 24 — 134 138 22 — 160 
Corporate(g)
— 359 151 510 — 324 141 465 
Hedge Funds and Similar Investments(h)
21 2 70 93 17 2 69 88 
Private Equity and Other(i)
— — 257 257 — — 250 250 
DTE Electric Total$159 $385 $543 $1,087 $180 $348 $524 $1,052 
_______________________________________
(a)For a description of levels within the fair value hierarchy see Note 12 to the Consolidated Financial Statements, "Fair Value."
(b)Amounts represent assets valued at NAV as a practical expedient for fair value.
(c)This category predominantly represents certain short-term fixed income securities and money market investments that are managed in separate accounts or commingled funds. Pricing for investments in this category is obtained from quoted prices in actively traded markets.
(d)This category represents portfolios of large, medium and small capitalization domestic equities. Investments in this category include exchange-traded securities held in a commingled fund classified as NAV assets.
(e)This category primarily consists of portfolios of non-U.S. developed and emerging market equities. Investments in this category include exchange-traded securities for which unadjusted quoted prices can be obtained and exchange-traded securities held in a commingled fund classified as NAV assets.
(f)This category includes U.S. Treasuries, bonds and other governmental debt. Pricing for investments in this category is obtained from quoted prices in actively traded markets and quotations from broker or pricing services.
(g)This category primarily consists of corporate bonds from diversified industries, bank loans, and mortgage backed securities. Pricing for investments in this category is obtained from quotations from broker or pricing services. Non-exchange traded securities and exchange-traded securities held in commingled funds are classified as NAV assets.
(h)This category utilizes a diversified group of strategies that attempt to capture uncorrelated sources of return and includes publicly traded mutual funds, insurance-linked and asset-backed securities, commingled funds and limited partnership funds. Pricing for mutual funds in this category is obtained from quoted prices in actively traded markets. Pricing for insurance-linked and asset-backed securities is obtained from quotations from broker or pricing services. Commingled funds and limited partnership funds are classified as NAV assets.
(i)This category includes a diversified group of funds and strategies that primarily invests in private equity partnerships. This category also includes investments in private real estate and private debt. All investments in this category are classified as NAV assets.
Schedule of Accumulated Benefit Obligations in Excess of Plan Assets
The following table reflects other postretirement benefit plans with accumulated postretirement benefit obligations in excess of plan assets as of December 31:
DTE EnergyDTE Electric
2025202420252024
(In millions)
Accumulated postretirement benefit obligation$541 $530 $510 $501 
Fair value of plan assets293 296 273 276 
Accumulated postretirement benefit obligation in excess of plan assets$248 $234 $237 $225 
Retiree healthcare plan (VEBA)  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Schedule of VEBA Contributions The following table provides contributions to the VEBA in:
Year Ended December 31,
202520242023
(In millions)
DTE Energy$15 $15 $16 
DTE Electric$7 $6 $7