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Long-Term Debt | 12 Months Ended
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Dec. 31, 2024
Debt Disclosure [Abstract] |
Long-Term Debt | LONG-TERM DEBT Long-Term Debt DTE Energy's long-term debt outstanding and interest rates of debt outstanding at December 31 were:
| Interest Rate(a) |  | Maturity Date |  | 2024 |  | 2023
|  |  |  |  | (In millions)
Mortgage bonds, notes, and other |  |  |  |  |  |  |
DTE Energy debt, unsecured | 4.2% |  | 2025 — 2034 |  | $ | 6,380 |  |  | $ | 5,105 |
DTE Electric debt, principally secured | 3.9% |  | 2025 — 2053 |  | 11,270 |  |  | 10,370 |
DTE Gas debt, principally secured | 4.3% |  | 2025 — 2054 |  | 2,865 |  |  | 2,545 |
|  |  |  |  | 20,515 |  |  | 18,020 |
Unamortized debt discount |  |  |  |  | (28) |  |  | (26) |
Unamortized debt issuance costs |  |  |  |  | (114) |  |  | (100) |
Long-term debt due within one year |  |  |  |  | (1,220) |  |  | (2,075) |
|  |  |  |  | $ | 19,153 |  |  | $ | 15,819 |
Securitization bonds(b) |  |  |  |  |  |  |
DTE Electric securitization bonds | 5.4% |  | 2027 — 2038 |  | $ | 713 |  |  | $ | 777 |
Unamortized debt issuance costs |  |  |  |  | (7) |  |  | (8) |
Long-term debt due within one year |  |  |  |  | (71) |  |  | (64) |
|  |  |  |  | $ | 635 |  |  | $ | 705 |
Junior Subordinated Debentures |  |  |  |  |  |  |
Subordinated debentures | 4.8% |  | 2077 — 2081 |  | $ | 910 |  |  | $ | 910 |
Unamortized debt issuance costs |  |  |  |  | (26) |  |  | (27) |
|  |  |  |  | $ | 884 |  |  | $ | 883 |
_______________________________________ (a)Weighted average interest rate as of December 31, 2024. (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 |  | 2024 |  | 2023
|  |  |  |  | (In millions)
Mortgage bonds, notes, and other |  |  |  |  |  |  |
Long-term debt, principally secured | 3.9% |  | 2025 — 2053 |  | $ | 11,270 |  |  | $ | 10,370 |
Unamortized debt discount |  |  |  |  | (22) |  |  | (23) |
Unamortized debt issuance costs |  |  |  |  | (73) |  |  | (73) |
Long-term debt due within one year |  |  |  |  | (350) |  |  | (100) |
|  |  |  |  | $ | 10,825 |  |  | $ | 10,174 |
Securitization bonds(b) |  |  |  |  |  |  |
DTE Electric securitization bonds | 5.4% |  | 2027 — 2038 |  | $ | 713 |  |  | $ | 777 |
Unamortized debt issuance costs |  |  |  |  | (7) |  |  | (8) |
Long-term debt due within one year |  |  |  |  | (71) |  |  | (64) |
|  |  |  |  | $ | 635 |  |  | $ | 705 |
_______________________________________ (a)Weighted average interest rate as of December 31, 2024. (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. Debt Issuances Refer to the table below for debt issued in 2024:
Company |  | Month |  | Type |  | Interest Rate |  | Maturity Date |  | Amount
|  |  |  |  |  |  |  |  |  | (In millions)
DTE Energy |  | February |  | Senior notes(a) |  | 5.10% |  | 2029 |  | $ | 1,200 |
DTE Electric |  | February |  | Mortgage bonds(b) |  | 4.85% |  | 2026 |  | 500 |
DTE Electric |  | February |  | Mortgage bonds(b) |  | 5.20% |  | 2034 |  | 500 |
DTE Energy |  | May |  | Senior notes(c) |  | 5.85% |  | 2034 |  | 850 |
DTE Energy |  | August |  | Senior notes(d) |  | 4.95% |  | 2027 |  | 1,200 |
DTE Gas |  | October |  | Mortgage bonds(b) |  | 4.87% |  | 2034 |  | 160 |
DTE Gas |  | October |  | Mortgage bonds(b) |  | 5.43% |  | 2054 |  | 160 |
|  |  |  |  |  |  |  |  |  | $ | 4,570 |
_______________________________ (a)Proceeds used for the repayment of short-term borrowings and for general corporate purposes. (b)Proceeds used for the repayment of short-term borrowings, for capital expenditures, and for other general corporate purposes. (c)Proceeds used for the repayment of a portion of the $675 million 2016 Series C 2.53% Senior Notes due October 1, 2024, for repayment of a portion of the $1.3 billion 2019 Series F 4.22% Senior Notes due November 1, 2024, and for general corporate purposes. (d)Proceeds used for the repayment of a portion of the $1.3 billion 2019 Series F 4.22% Senior Notes due November 1, 2024 and for general corporate purposes. Debt Redemptions Refer to the table below for debt redeemed in 2024:
Company |  | Month |  | Type |  | Interest Rate |  | Maturity Date |  | Amount
|  |  |  |  |  |  |  |  |  | (In millions)
DTE Electric |  | March |  | Mortgage Bonds |  | 3.65% |  | 2024 |  | $ | 100 |
DTE Electric |  | June |  | Securitization bonds |  | 2.64% |  | 2024 |  | 19
DTE Electric |  | September |  | Securitization bonds |  | 5.97% |  | 2024 |  | 24
DTE Energy |  | October |  | Senior notes |  | 2.53% |  | 2024 |  | 675
DTE Energy |  | November |  | Senior notes |  | 4.22% |  | 2024 |  | 1,300
DTE Electric |  | December |  | Securitization bonds |  | 2.64% |  | 2024 |  | 21
|  |  |  |  |  |  |  |  |  | $ | 2,139 |
Debt Maturities The following table shows the Registrants' scheduled debt maturities, excluding any unamortized discount on debt:
| 2025 |  | 2026 |  | 2027 |  | 2028 |  | 2029 |  | 2030 and Thereafter |  | Total
| (In millions)
DTE Energy(a)(b) | $ | 1,291 |  |  | $ | 1,351 |  |  | $ | 1,430 |  |  | $ | 1,737 |  |  | $ | 1,962 |  |  | $ | 14,367 |  |  | $ | 22,138 |
DTE Electric(b) | $ | 421 |  |  | $ | 751 |  |  | $ | 39 |  |  | $ | 617 |  |  | $ | 103 |  |  | $ | 10,052 |  |  | $ | 11,983 |
_______________________________________ (a)Amounts include DTE Electric's scheduled debt maturities. (b)Amounts include DTE Securitization I and DTE Securitization II scheduled debt maturities. The following table shows scheduled interest payments related to the Registrants' long-term debt:
| 2025 |  | 2026 |  | 2027 |  | 2028 |  | 2029 |  | 2030 and Thereafter |  | Total
| (In millions)
DTE Energy(a)(b) | $ | 905 |  |  | $ | 888 |  |  | $ | 806 |  |  | $ | 742 |  |  | $ | 664 |  |  | $ | 8,467 |  |  | $ | 12,472 |
DTE Electric(b) | $ | 477 |  |  | $ | 466 |  |  | $ | 434 |  |  | $ | 426 |  |  | $ | 418 |  |  | $ | 4,874 |  |  | $ | 7,095 |
_______________________________________ (a)Amounts include DTE Electric's scheduled interest payments. (b)Amounts include DTE Securitization I and DTE Securitization II scheduled interest payments. Junior Subordinated Debentures DTE Energy has the right to defer interest payments on the Junior Subordinated Debentures. Should DTE Energy exercise this right, it cannot declare or pay dividends on, or redeem, purchase or acquire, any of its capital stock during the deferral period. Any deferred interest payments will bear additional interest at the rate associated with the related debt issue. As of December 31, 2024, no interest payments have been deferred on the Junior Subordinated Debentures. Cross Default Provisions Substantially all of the net utility properties of DTE Electric and DTE Gas are subject to the lien of mortgages. Should DTE Electric or DTE Gas fail to timely pay their indebtedness under these mortgages, such failure may create cross defaults in the indebtedness of DTE Energy.

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