Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2024

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	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

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(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

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(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.

Schedule of Debt Issued

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

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(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.

Schedule of Debt Redeemed

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

Schedule of Maturities of Long-term Debt

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

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(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:

	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

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(a)Amounts include DTE Electric's scheduled interest payments.

(b)Amounts include DTE Securitization I and DTE Securitization II scheduled interest payments.