XML 77 R55.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Long-Term Debt (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2023
Debt Disclosure [Abstract] |
Schedule of Long-term Debt Instruments | DTE Energy's long-term debt outstanding and interest rates of debt outstanding at December 31 were:
| Interest Rate(a) |  | Maturity Date |  | 2023 |  | 2022
|  |  |  |  | (In millions)
Mortgage bonds, notes, and other |  |  |  |  |  |  |
DTE Energy debt, unsecured | 3.3% |  | 2024 — 2030 |  | $ | 5,105 |  |  | $ | 5,105 |
DTE Electric debt, principally secured | 3.8% |  | 2024 — 2053 |  | 10,370 |  |  | 9,572 |
DTE Gas debt, principally secured | 4.2% |  | 2025 — 2052 |  | 2,545 |  |  | 2,325 |
|  |  |  |  | 18,020 |  |  | 17,002 |
Unamortized debt discount |  |  |  |  | (26) |  |  | (26) |
Unamortized debt issuance costs |  |  |  |  | (100) |  |  | (92) |
Long-term debt due within one year |  |  |  |  | (2,075) |  |  | (1,077) |
|  |  |  |  | $ | 15,819 |  |  | $ | 15,807 |
Securitization bonds(b) |  |  |  |  |  |  |
DTE Electric securitization bonds | 5.3% |  | 2027 — 2038 |  | $ | 777 |  |  | $ | 215 |
Unamortized debt issuance costs |  |  |  |  | (8) |  |  | (4) |
Long-term debt due within one year |  |  |  |  | (64) |  |  | (39) |
|  |  |  |  | $ | 705 |  |  | $ | 172 |
Junior Subordinated Debentures |  |  |  |  |  |  |
Subordinated debentures | 4.8% |  | 2077 — 2081 |  | $ | 910 |  |  | $ | 910 |
Unamortized debt issuance costs |  |  |  |  | (27) |  |  | (27) |
|  |  |  |  | $ | 883 |  |  | $ | 883 |
_______________________________________ (a)Weighted average interest rate as of December 31, 2023. (b)Bonds are held by DTE Securitization I and DTE Securitization II, special purpose entities consolidated by DTE Electric. Refer to Note 1 to the Consolidated Financial Statements, “Organization and Basis of Presentation,” for additional information regarding these entities and restrictions related to the bonds. DTE Electric's long-term debt outstanding and interest rates of debt outstanding at December 31 were:
| Interest Rate(a) |  | Maturity Date |  | 2023 |  | 2022
|  |  |  |  | (In millions)
Mortgage bonds, notes, and other |  |  |  |  |  |  |
Long-term debt, principally secured | 3.8% |  | 2024 — 2053 |  | $ | 10,370 |  |  | $ | 9,572 |
Unamortized debt discount |  |  |  |  | (23) |  |  | (22) |
Unamortized debt issuance costs |  |  |  |  | (73) |  |  | (65) |
Long-term debt due within one year |  |  |  |  | (100) |  |  | (203) |
|  |  |  |  | $ | 10,174 |  |  | $ | 9,282 |
Securitization bonds(b) |  |  |  |  |  |  |
DTE Electric securitization bonds | 5.3% |  | 2027 — 2038 |  | $ | 777 |  |  | $ | 215 |
Unamortized debt issuance costs |  |  |  |  | (8) |  |  | (4) |
Long-term debt due within one year |  |  |  |  | (64) |  |  | (39) |
|  |  |  |  | $ | 705 |  |  | $ | 172 |
_______________________________________ (a)Weighted average interest rate as of December 31, 2023. (b)Bonds are held by DTE Securitization I and DTE Securitization II, special purpose entities consolidated by DTE Electric. Refer to Note 1 to the Consolidated Financial Statements, “Organization and Basis of Presentation,” for additional information regarding these entities and restrictions related to the bonds.
Schedule of Debt Issued | Refer to the table below for debt issued in 2023:
Company |  | Month |  | Type |  | Interest Rate |  | Maturity Date |  | Amount
|  |  |  |  |  |  |  |  |  | (In millions)
DTE Electric |  | March |  | Mortgage bonds(a) |  | 5.20% |  | 2033 |  | $ | 600 |
DTE Electric |  | March |  | Mortgage bonds(a) |  | 5.40% |  | 2053 |  | 600 |
DTE Energy |  | March |  | Term loan facility draw(b) |  | Variable |  | 2023 |  | 200 |
DTE Energy |  | May |  | Senior notes(c) |  | 4.875% |  | 2028 |  | 800 |
DTE Electric |  | June |  | Tax-exempt revenue bonds(d) |  | 3.875% |  | 2053 |  | 100 |
DTE Gas |  | October |  | Mortgage bonds(a) |  | 5.57% |  | 2030 |  | 150 |
DTE Gas |  | October |  | Mortgage bonds(a) |  | 5.73% |  | 2035 |  | 145 |
DTE Electric |  | November |  | Securitization bonds(e) |  | 5.97% |  | 2033(f) |  | 301 |
DTE Electric |  | November |  | Securitization bonds(e) |  | 6.09% |  | 2038(g) |  | 301 |
|  |  |  |  |  |  |  |  |  | $ | 3,197 |
_______________________________________ (a)Proceeds used for the repayment of short-term borrowings, for capital expenditures, and for other general corporate purposes. (b)Proceeds used for general corporate purposes. (c)Proceeds used for the repayment of amounts outstanding under the term loan facility. (d)Tax-exempt revenue bonds are issued by a public body that loans the proceeds to DTE Electric with terms substantially mirroring the revenue bonds. Proceeds were used to finance costs relating to solid waste disposal facilities at the Monroe and St. Clair power plants. The bonds will be subject to mandatory tender in June 2030. (e)Bonds were issued in alignment with Green Bond principles to support the closure and recovery of St. Clair and Trenton Channel generation plants and DTE Electric's transition to cleaner energy. Proceeds were used to reimburse DTE Electric for qualified costs incurred or the net book value of the St. Clair and Trenton Channel plants and other qualified costs. The securitization financing order from the MPSC required that the net proceeds be subsequently applied by DTE Electric to retire existing debt or equity. Accordingly, DTE Electric used net proceeds of $297 million towards the partial retirement of the 2013 Series B Mortgage bonds noted in the Debt Redemptions table below and issued a special dividend of $297 million to DTE Energy. Refer to Note 9 to the Consolidated Financial Statements, "Regulatory Matters," for additional information. (f)Principal payments on the bonds will be made semi-annually beginning September 2024, with the final payment scheduled for March 2032. (g)Principal payments on the bonds will be made semi-annually beginning March 2032, with the final payment scheduled for September 2037.
Schedule of Debt Redeemed | Refer to the table below for debt redeemed in 2023:
Company |  | Month |  | Type |  | Interest Rate |  | Maturity Date |  | Amount
|  |  |  |  |  |  |  |  |  | (In millions)
DTE Gas |  | April |  | Senior notes |  | 6.44% |  | 2023 |  | $ | 25 |
DTE Energy |  | May |  | Term loan facility |  | Variable |  | 2023 |  | 800
DTE Electric |  | June |  | Securitization bonds |  | 2.64% |  | 2023 |  | 19
DTE Energy |  | June |  | Term loan facility |  | Variable |  | 2023 |  | 200
DTE Electric |  | September |  | Mortgage bonds |  | 4.31% |  | 2023 |  | 102
DTE Electric |  | October |  | Senior notes |  | 5.19% |  | 2023 |  | 100
DTE Electric |  | December |  | Securitization bonds |  | 2.64% |  | 2023 |  | 20
DTE Gas |  | December |  | Mortgage bonds |  | 3.64% |  | 2023 |  | 50
DTE Electric |  | December |  | Mortgage bonds(a) |  | 3.65% |  | 2024 |  | 300
|  |  |  |  |  |  |  |  |  | $ | 1,616 |
_______________________________________ (a)Represents a partial redemption with $100 million remaining principal to be redeemed in 2024.
Schedule of Maturities of Long-term Debt | The following table shows the Registrants' scheduled debt maturities, excluding any unamortized discount on debt:
| 2024 |  | 2025 |  | 2026 |  | 2027 |  | 2028 |  | 2029 and Thereafter |  | Total
| (In millions)
DTE Energy(a)(b) | $ | 2,139 |  |  | $ | 1,292 |  |  | $ | 851 |  |  | $ | 230 |  |  | $ | 1,737 |  |  | $ | 13,458 |  |  | $ | 19,707 |
DTE Electric(b) | $ | 164 |  |  | $ | 422 |  |  | $ | 251 |  |  | $ | 39 |  |  | $ | 617 |  |  | $ | 9,654 |  |  | $ | 11,147 |
_______________________________________ (a)Amounts include DTE Electric's scheduled debt maturities. (b)Amounts include DTE Securitization I and DTE Securitization II scheduled debt maturities.
Scheduled Interest Payments Related to Long-term Debt | The following table shows scheduled interest payments related to the Registrants' long-term debt:
| 2024 |  | 2025 |  | 2026 |  | 2027 |  | 2028 |  | 2029 and Thereafter |  | Total
| (In millions)
DTE Energy(a)(b) | $ | 749 |  |  | $ | 668 |  |  | $ | 651 |  |  | $ | 623 |  |  | $ | 589 |  |  | $ | 8,412 |  |  | $ | 11,692 |
DTE Electric(b) | $ | 432 |  |  | $ | 427 |  |  | $ | 416 |  |  | $ | 408 |  |  | $ | 400 |  |  | $ | 5,150 |  |  | $ | 7,233 |
_______________________________________ (a)Amounts include DTE Electric's scheduled interest payments. (b)Amounts include DTE Securitization I and DTE Securitization II scheduled interest payments.

X
- Definition Schedule Of Issued Debt [Table Text Block] + References No definition available. + Details
Name: | dte_ScheduleOfIssuedDebtTableTextBlock
Namespace Prefix: | dte_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of contractual obligation by timing of payment due. Includes, but is not limited to, long-term debt obligation, lease obligation, and purchase obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (S-X 210.12-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3 + Details
Name: | srt_ContractualObligationFiscalYearMaturityScheduleTableTextBlock
Namespace Prefix: | srt_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of debt instruments or arrangements with redemption features. Includes, but is not limited to, description of debt redemption features, percentage price at which debt can be redeemed by the issuer, and period start and end for debt maturity or redemption. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentRedemptionTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69E -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69E Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-2 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-1A Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-3 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482949/835-30-55-8 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480848/942-470-50-3 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-8 Reference 11: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-6 Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-7 + Details
Name: | us-gaap_ScheduleOfDebtInstrumentsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of maturity and sinking fund requirement for long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 470 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481544/470-10-50-1 + Details
Name: | us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration