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Retirement Benefits and Trusteed Assets (Tables)
 12 Months Ended
Dec. 31, 2024
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Schedule of Defined Benefit Plans Disclosures
The table below represents the pension and other postretirement benefit plans of each Registrant at December 31, 2024:
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 Defined Benefit Plans Disclosures
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
20242023
(In millions)
Accumulated benefit obligation, end of year$3,803 $4,089 
Change in projected benefit obligation
Projected benefit obligation, beginning of year$4,318 $4,309 
Service cost58 57 
Interest cost208 214 
Actuarial (gain) loss(254)74 
Benefits paid(348)(329)
Settlements— (7)
Projected benefit obligation, end of year$3,982 $4,318 
Change in plan assets
Plan assets at fair value, beginning of year$3,960 $3,897 
Actual return on plan assets137 363 
Company contributions9 36 
Benefits paid(348)(329)
Settlements— (7)
Plan assets at fair value, end of year$3,758 $3,960 
Funded status$(224)$(358)
Amount recorded as:
Current liabilities$(10)$(8)
Noncurrent liabilities(214)(350)
$(224)$(358)
Amounts recognized in Accumulated other comprehensive income, pre-tax
Net actuarial loss$76 $76 
$76 $76 
Amounts recognized in Regulatory assets(a)
Net actuarial loss$1,318 $1,426 
Prior service credit(3)(5)
$1,315 $1,421 
______________________________________
(a)See Note 8 to the Consolidated Financial Statements, "Regulatory Matters."
Schedule of Net Benefit Costs
Net pension cost (credit) for DTE Energy includes the following components:
202420232022
(In millions)
Service cost$58 $57 $95 
Interest cost208 214 166 
Expected return on plan assets(341)(352)(346)
Amortization of:
Net actuarial loss59 7 115 
Prior service credit(2)(2)(1)
Settlements— 7 94 
Net pension cost (credit)$(18)$(69)$123 
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)
20242023
(In millions)
Other changes in plan assets and benefit obligations recognized in Regulatory assets and Other comprehensive income (loss)
Net actuarial (gain) loss$(49)$62 
Amortization of net actuarial loss and settlements(59)(14)
Amortization of prior service credit2 2 
Total recognized in Regulatory assets and Other comprehensive income (loss)$(106)$50 
Total recognized in net periodic pension credit, Regulatory assets, and Other comprehensive income (loss)$(124)$(19)
Schedule of Expected Benefit Payments
At December 31, 2024, 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)
2025$321 
2026321 
2027323 
2028325 
2029321 
2030-20341,585 
Total$3,196 
Schedule of Assumptions Used
Assumptions used in determining the projected benefit obligation and net pension costs of DTE Energy are:
202420232022
Projected benefit obligation
Discount rate5.65%5.00%5.19%
Rate of compensation increase3.55%3.80%3.80%
Cash balance interest crediting rate4.50%3.60%3.40%
Net pension costs
Discount rate5.00%5.19%2.91%
Rate of compensation increase3.80%3.80%3.80%
Expected long-term rate of return on plan assets8.00%7.60%6.80%
Cash balance interest crediting rate3.60%3.40%2.40%
Schedule of Allocation of Plan Assets
Target allocations for DTE Energy's pension plan assets as of December 31, 2024 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 Securities58 
Hedge Funds and Similar Investments8 
Private Equity and Other19 
100 %
The following table provides the fair value measurement amounts for DTE Energy's pension plan assets at December 31, 2024 and 2023(a):
December 31, 2024December 31, 2023
Level 1Level 2
Other(b)
TotalLevel 1Level 2
Other(b)
Total
DTE Energy asset category:(In millions)
Short-term Investments(c)
$97 $— $— $97 $100 $— $— $100 
Equity Securities
Domestic(d)
— — 349 349 — — 550 550 
International(e)
35 — 188 223 55 — 309 364 
Fixed Income Securities
Governmental(f)
627 76 — 703 531 78 — 609 
Corporate(g)
— 1,350 — 1,350 — 1,323 — 1,323 
Hedge Funds and Similar Investments(h)
137 14 167 318 104 68 110 282 
Private Equity and Other(i)
— — 718 718 — — 732 732 
DTE Energy Total$896 $1,440 $1,422 $3,758 $790 $1,469 $1,701 $3,960 
_______________________________________
(a)For a description of levels within the fair value hierarchy, see Note 11 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 Defined Benefit Plans Disclosures
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
2024202320242023
(In millions)
Change in accumulated postretirement benefit obligation
Accumulated postretirement benefit obligation, beginning of year$1,283 $1,293 $982 $982 
Service cost18 17 14 13 
Interest cost62 65 47 49 
Actuarial (gain) loss(165)(5)(139)2 
Benefits paid(75)(87)(55)(64)
Accumulated postretirement benefit obligation, end of year$1,123 $1,283 $849 $982 
Change in plan assets
Plan assets at fair value, beginning of year$1,614 $1,577 $1,070 $1,052 
Actual return on plan assets58 124 40 81 
Benefits paid(78)(87)(58)(63)
Plan assets at fair value, end of year$1,594 $1,614 $1,052 $1,070 
Funded status$471 $331 $203 $88 
Amount recorded as:
Noncurrent assets$705 $633 $428 $378 
Current liabilities(1)(1)— — 
Noncurrent liabilities(233)(301)(225)(290)
$471 $331 $203 $88 
Amounts recognized in Accumulated other comprehensive income (loss), pre-tax
Net actuarial gain$(14)$(13)$— $— 
Amounts recognized in Regulatory assets and liabilities(a)
Net actuarial (gain) loss$65 $173 $(26)$73 
Prior service credit— (10)— (6)
$65 $163 $(26)$67 
______________________________________
(a)See Note 8 to the Consolidated Financial Statements, "Regulatory Matters."
Schedule of Net Benefit Costs
Net other postretirement credit for DTE Energy includes the following components:
202420232022
(In millions)
Service cost$18 $17 $27 
Interest cost62 65 48 
Expected return on plan assets(120)(111)(126)
Amortization of:
Net actuarial loss6 10 4 
Prior service credit(10)(19)(19)
Net other postretirement credit$(44)$(38)$(66)
Net other postretirement credit for DTE Electric includes the following components:
202420232022
(In millions)
Service cost$14 $13 $20 
Interest cost47 49 37 
Expected return on plan assets(79)(73)(85)
Amortization of:
Net actuarial loss1 1 5 
Prior service credit(6)(14)(14)
Net other postretirement credit$(23)$(24)$(37)
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)
20242023
(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$(103)$(17)
Amortization of net actuarial loss(6)(10)
Amortization of prior service credit10 19 
Total recognized in Regulatory assets and liabilities and Other comprehensive income (loss)$(99)$(8)
Total recognized in net periodic benefit cost, Regulatory assets and liabilities, and Other comprehensive income (loss)$(143)$(46)
20242023
(In millions)
Other changes in plan assets and accumulated postretirement benefit obligation recognized in Regulatory assets and liabilities
Net actuarial gain$(98)$(6)
Amortization of net actuarial loss(1)(1)
Amortization of prior service credit6 14 
Total recognized in Regulatory assets and liabilities$(93)$7 
Total recognized in net periodic benefit cost and Regulatory assets and liabilities$(116)$(17)
Schedule of Expected Benefit Payments
At December 31, 2024, 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)
2025$78 $59 
202682 62 
202783 63 
202885 64 
202987 66 
2030-2034456 347 
Total$871 $661 
Schedule of Assumptions Used
Assumptions used in determining the accumulated postretirement benefit obligation and net other postretirement benefit costs of the Registrants are:
202420232022
Accumulated postretirement benefit obligation
Discount rate5.66%5.00%5.19%
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
Other postretirement benefit costs
Discount rate5.00%5.19%2.91%
Expected long-term rate of return on plan assets7.60%7.20%6.40%
Health care trend rate pre- and post- 65
7.75 / 8.25%
6.75 / 7.25%
6.75 / 7.25%
Ultimate health care trend rate4.50%4.50%4.50%
Year in which ultimate reached pre- and post- 65203520352034
Schedule of Allocation of Plan Assets
Target allocations for the Registrants' other postretirement benefit plan assets as of December 31, 2024 are listed below:
U.S. Large Cap Equity Securities4 %
Non-U.S. Equity Securities3 
Fixed Income Securities63 
Hedge Funds and Similar Investments9 
Private Equity and Other21 
100 %
The following tables provide the fair value measurement amounts for the Registrants' other postretirement benefit plan assets at December 31, 2024 and 2023(a):
December 31, 2024December 31, 2023
Level 1Level 2
Other(b)
TotalLevel 1Level 2
Other(b)
Total
(In millions)
DTE Energy asset category:
Short-term Investments(c)
$33 $— $— $33 $41 $— $— $41 
Equity Securities
Domestic(d)
— — 67 67 — — 76 76 
International(e)
6 — 34 40 7 — 43 50 
Fixed Income Securities
Governmental(f)
210 34 — 244 242 31 — 273 
Corporate(g)
— 492 208 700 — 459 212 671 
Hedge Funds and Similar Investments(h)
27 3 103 133 18 21 86 125 
Private Equity and Other(i)
— — 377 377 — — 378 378 
DTE Energy Total$276 $529 $789 $1,594 $308 $511 $795 $1,614 
DTE Electric asset category:
Short-term Investments(c)
$21 $— $— $21 $27 $— $— $27 
Equity Securities
Domestic(d)
— — 42 42 — — 48 48 
International(e)
4 — 22 26 4 — 27 31 
Fixed Income Securities
Governmental(f)
138 22 — 160 161 21 — 182 
Corporate(g)
— 324 141 465 — 302 145 447 
Hedge Funds and Similar Investments(h)
17 2 69 88 11 14 58 83 
Private Equity and Other(i)
— — 250 250 — — 252 252 
DTE Electric Total$180 $348 $524 $1,052 $203 $337 $530 $1,070 
_______________________________________
(a)For a description of levels within the fair value hierarchy see Note 11 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
2024202320242023
(In millions)
Accumulated postretirement benefit obligation$530 $628 $501 $592 
Fair value of plan assets296 326 276 302 
Accumulated postretirement benefit obligation in excess of plan assets$234 $302 $225 $290 
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:
202420232022
(In millions)
DTE Energy$15 $16 $16 
DTE Electric$6 $7 $7