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Retirement Benefits and Trusteed Assets (Tables)
 12 Months Ended
Dec. 31, 2022
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, 2022:
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 prepaid pension cost or pension liability in DTE Energy's Consolidated Statements of Financial Position at December 31:
DTE Energy
20222021
(In millions)
Accumulated benefit obligation, end of year$4,078 $5,448 
Change in projected benefit obligation
Projected benefit obligation, beginning of year$5,857 $6,304 
Service cost95 108 
Interest cost166 158 
Plan amendments— 4 
Actuarial gain(1,252)(255)
Benefits paid(278)(414)
Settlements(279)(48)
Projected benefit obligation, end of year$4,309 $5,857 
Change in plan assets
Plan assets at fair value, beginning of year$5,507 $5,497 
Actual return on plan assets(1,062)460 
Company contributions9 12 
Benefits paid(278)(414)
Settlements(279)(48)
Plan assets at fair value, end of year$3,897 $5,507 
Funded status$(412)$(350)
Amount recorded as:
Current liabilities$(34)$(11)
Noncurrent liabilities(378)(339)
$(412)$(350)
Amounts recognized in Accumulated other comprehensive income (loss), pre-tax
Net actuarial loss$85 $126 
Prior service cost— 1 
$85 $127 
Amounts recognized in Regulatory assets(a)
Net actuarial loss$1,369 $1,381 
Prior service credit(7)(9)
$1,362 $1,372 
______________________________________
(a)See Note 9 to the Consolidated Financial Statements, "Regulatory Matters."
Schedule of Net Benefit Costs
Net pension cost for DTE Energy includes the following components:
202220212020
(In millions)
Service cost$95 $108 $99 
Interest cost166 158 186 
Expected return on plan assets(346)(339)(334)
Amortization of:
Net actuarial loss115 196 171 
Prior service cost (credit)(1)— 1 
Settlements94 16 25 
Net pension cost$123 $139 $148 
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)
20222021
(In millions)
Other changes in plan assets and benefit obligations recognized in Regulatory assets and Other comprehensive income (loss)
Net actuarial (gain) loss$156 $(376)
Amortization of net actuarial loss and settlements(209)(209)
Prior service cost— 4 
Amortization of prior service (cost) credit1 (3)
Total recognized in Regulatory assets and Other comprehensive income (loss)$(52)$(584)
Total recognized in net periodic pension cost, Regulatory assets, and Other comprehensive income (loss)$71 $(445)
Schedule of Expected Benefit Payments
At December 31, 2022, 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)
2023$344 
2024319 
2025328 
2026323 
2027323 
2028-20321,616 
Total$3,253 
Schedule of Assumptions Used
Assumptions used in determining the projected benefit obligation and net pension costs of DTE Energy are:
202220212020
Projected benefit obligation
Discount rate5.19%2.91%2.57%
Rate of compensation increase3.80%3.80%3.80%
Cash balance interest crediting rate3.40%2.40%2.00%
Net pension costs
Discount rate2.91%2.57%3.28%
Rate of compensation increase3.80%3.80%3.85%
Expected long-term rate of return on plan assets6.80%7.00%7.10%
Cash balance interest crediting rate2.40%2.00%3.30%
Schedule of Allocation of Plan Assets
Target allocations for DTE Energy's pension plan assets as of December 31, 2022 are listed below:
U.S. Large Capitalization (Cap) Equity Securities15 %
U.S. Small Cap and Mid Cap Equity Securities3 
Non-U.S. Equity Securities12 
Fixed Income Securities48 
Hedge Funds and Similar Investments9 
Private Equity and Other13 
100 %
The following table provides the fair value measurement amounts for DTE Energy's pension plan assets at December 31, 2022 and 2021(a):
December 31, 2022December 31, 2021
Level 1Level 2
Other(b)
TotalLevel 1Level 2
Other(b)
Total
DTE Energy asset category:(In millions)
Short-term Investments(c)
$77 $— $— $77 $112 $— $— $112 
Equity Securities
Domestic(d)
— — 483 483 155 — 758 913 
International(e)
65 — 416 481 88 — 588 676 
Fixed Income Securities
Governmental(f)
506 77 — 583 943 83 — 1,026 
Corporate(g)
— 1,203 — 1,203 — 1,466 — 1,466 
Hedge Funds and Similar Investments(h)
86 50 185 321 139 63 365 567 
Private Equity and Other(i)
— — 749 749 — — 747 747 
DTE Energy Total$734 $1,330 $1,833 $3,897 $1,437 $1,612 $2,458 $5,507 
_______________________________________
(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 for which unadjusted quoted prices can be obtained and 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 Accrued postretirement liability in the Registrants' Consolidated Statements of Financial Position at December 31:
DTE EnergyDTE Electric
2022202120222021
(In millions)
Change in accumulated postretirement benefit obligation
Accumulated postretirement benefit obligation, beginning of year$1,702 $1,807 $1,293 $1,369 
Service cost27 30 20 23 
Interest cost48 46 37 35 
Plan amendments— 1 — — 
Actuarial gain(395)(100)(301)(73)
Benefits paid(89)(82)(67)(61)
Accumulated postretirement benefit obligation, end of year$1,293 $1,702 $982 $1,293 
Change in plan assets
Plan assets at fair value, beginning of year$2,021 $1,960 $1,355 $1,320 
Actual return on plan assets(359)142 (239)96 
Benefits paid(85)(81)(64)(61)
Plan assets at fair value, end of year$1,577 $2,021 $1,052 $1,355 
Funded status$284 $319 $70 $62 
Amount recorded as:
Noncurrent assets$571 $678 $345 $402 
Current liabilities— (1)— — 
Noncurrent liabilities(287)(358)(275)(340)
$284 $319 $70 $62 
Amounts recognized in Accumulated other comprehensive income (loss), pre-tax
Net actuarial gain$(14)$(1)$— $— 
Amounts recognized in Regulatory assets(a)
Net actuarial loss$201 $102 $80 $61 
Prior service credit(29)(49)(20)(34)
$172 $53 $60 $27 
______________________________________
(a)See Note 9 to the Consolidated Financial Statements, "Regulatory Matters."
Schedule of Net Benefit Costs
Net other postretirement credit for DTE Energy includes the following components:
202220212020
(In millions)
Service cost$27 $30 $26 
Interest cost48 46 56 
Expected return on plan assets(126)(129)(128)
Amortization of:
Net actuarial loss4 13 16 
Prior service credit(19)(19)(19)
Net other postretirement credit$(66)$(59)$(49)
Net other postretirement credit for DTE Electric includes the following components:
202220212020
(In millions)
Service cost$20 $23 $20 
Interest cost37 35 43 
Expected return on plan assets(85)(86)(87)
Amortization of:
Net actuarial loss5 11 11 
Prior service credit(14)(14)(14)
Net other postretirement credit$(37)$(31)$(27)
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)
20222021
(In millions)
Other changes in plan assets and accumulated postretirement benefit obligation recognized in Regulatory assets and Other comprehensive income (loss)
Net actuarial (gain) loss$90 $(113)
Amortization of net actuarial loss(4)(13)
Prior service cost1 1 
Amortization of prior service credit19 19 
Total recognized in Regulatory assets and Other comprehensive income (loss)$106 $(106)
Total recognized in net periodic benefit cost, Regulatory assets, and Other comprehensive income (loss)$40 $(165)
20222021
(In millions)
Other changes in plan assets and accumulated postretirement benefit obligation recognized in Regulatory assets
Net actuarial (gain) loss$24 $(84)
Amortization of net actuarial loss(5)(11)
Amortization of prior service credit14 14 
Total recognized in Regulatory assets$33 $(81)
Total recognized in net periodic benefit cost and Regulatory assets$(4)$(112)
Schedule of Expected Benefit Payments
At December 31, 2022, 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)
2023$84 $64 
202489 67 
202590 68 
202691 69 
202794 71 
2028-2032488 371 
Total$936 $710 
Schedule of Assumptions Used
Assumptions used in determining the accumulated postretirement benefit obligation and net other postretirement benefit costs of the Registrants are:
202220212020
Accumulated postretirement benefit obligation
Discount rate5.19%2.91%2.58%
Health care trend rate pre- and post- 65
6.75 / 7.25%
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- 65203520342033
Other postretirement benefit costs
Discount rate2.91%2.58%3.29%
Expected long-term rate of return on plan assets6.40%6.70%7.20%
Health care trend rate pre- and post- 65
6.75 / 7.25%
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- 65203420332032
Schedule of Allocation of Plan Assets
Target allocations for the Registrants' other postretirement benefit plan assets as of December 31, 2022 are listed below:
U.S. Large Cap Equity Securities5 %
U.S. Small Cap and Mid Cap Equity Securities1 
Non-U.S. Equity Securities4 
Fixed Income Securities61 
Hedge Funds and Similar Investments9 
Private Equity and Other20 
100 %
The following tables provide the fair value measurement amounts for the Registrants' other postretirement benefit plan assets at December 31, 2022 and 2021(a):
December 31, 2022December 31, 2021
Level 1Level 2
Other(b)
TotalLevel 1Level 2
Other(b)
Total
(In millions)
DTE Energy asset category:
Short-term Investments(c)
$35 $— $— $35 $39 $— $— $39 
Equity Securities
Domestic(d)
— — 78 78 27 — 199 226 
International(e)
9 — 61 70 27 — 141 168 
Fixed Income Securities
Governmental(f)
264 32 — 296 343 32 — 375 
Corporate(g)
— 396 194 590 — 355 271 626 
Hedge Funds and Similar Investments(h)
31 22 94 147 58 26 120 204 
Private Equity and Other(i)
— — 361 361 — — 383 383 
DTE Energy Total$339 $450 $788 $1,577 $494 $413 $1,114 $2,021 
DTE Electric asset category:
Short-term Investments(c)
$23 $— $— $23 $26 $— $— $26 
Equity Securities
Domestic(d)
— — 50 50 18 — 132 150 
International(e)
5 — 39 44 18 — 93 111 
Fixed Income Securities
Governmental(f)
178 21 — 199 230 21 — 251 
Corporate(g)
— 262 134 396 — 235 187 422 
Hedge Funds and Similar Investments(h)
20 15 63 98 39 17 81 137 
Private Equity and Other(i)
— — 242 242 — — 258 258 
DTE Electric Total$226 $298 $528 $1,052 $331 $273 $751 $1,355 
_______________________________________
(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 for which unadjusted quoted prices can be obtained and 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
2022202120222021
(In millions)
Accumulated postretirement benefit obligation$625 $822 $591 $775 
Fair value of plan assets338 463 316 435 
Accumulated postretirement benefit obligation in excess of plan assets$287 $359 $275 $340 
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:
202220212020
(In millions)
DTE Energy$16 $18 $15 
DTE Electric$7 $8 $7