Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2025

Accounting Policies [Abstract]

Schedule of Other Income

The following is a summary of DTE Energy's Other income:

	Three Months Ended March 31,
	2025		2024
	(In millions)
Allowance for equity funds used during construction	$	24	$	18
Contract services	9		7
Equity earnings (losses) of equity method investees	7		(8)
Investment income(a)	1		6
Other	3		4
	$	44	$	27

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(a)Investment losses are recorded separately to Other expenses on the Consolidated Statements of Operations.

The following is a summary of DTE Electric's Other income:

	Three Months Ended March 31,
	2025		2024
	(In millions)
Allowance for equity funds used during construction	$	24	$	18
Contract services	9		6
Investment income(a)	1		5
Other	2		3
	$	36	$	32

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(a)Investment losses are recorded separately to Other expenses on the Consolidated Statements of Operations.

Schedule of Effective Income Tax Rate Reconciliation

The tables below summarize how the Registrants' effective income tax rates have varied from the statutory federal income tax rate:

	Three Months Ended March 31,
	2025		2024
DTE Energy
Statutory federal income tax rate	21.0	%	21.0	%
Increase (decrease) due to:
State and local income taxes, net of federal benefit	4.2		4.1
Investment tax credits	(13.1)		(3.1)
Production tax credits	(10.5)		(8.3)
TCJA regulatory liability amortization	(4.5)		(4.9)
AFUDC equity	(1.5)		(1.2)
Other	0.2		(1.4)
Effective income tax rate	(4.2)	%	6.2	%

	Three Months Ended March 31,
	2025		2024
DTE Electric
Statutory federal income tax rate	21.0	%	21.0	%
Increase (decrease) due to:
State and local income taxes, net of federal benefit	5.7		5.3
Investment tax credits	(16.6)		(0.2)
Production tax credits	(7.0)		(9.7)
TCJA regulatory liability amortization	(4.6)		(5.1)
AFUDC equity	(1.8)		(1.5)
Other	0.4		(0.2)
Effective income tax rate	(2.9)	%	9.6	%

Schedule of Financing Receivables Classified by Internal Grade of Credit Risk

The following represents the Registrants' financing receivables by year of origination, classified by internal grade of credit risk, including current year-to-date gross write-offs, if any. The related credit quality indicators and risk ratings utilized to develop the internal grades have been updated through March 31, 2025.

	DTE Energy								DTE Electric
	Year of Origination
	2025		2024		2023 and Prior		Total		2025 and Prior
	(In millions)
Notes receivable
Internal grade 1	$	7	$	4	$	27	$	38	$	34
Internal grade 2	2		669		256		927		1
Total notes receivable(a)	$	9	$	673	$	283	$	965	$	35
Net investment in leases
Internal grade 1	$	—	$	—	$	35	$	35	$	—
Internal grade 2	—		2		—		2		—
Total net investment in leases(a)	$	—	$	2	$	35	$	37	$	—

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(a)For DTE Energy, the current portion is included in Current Assets — Other on the Consolidated Statements of Financial Position. For DTE Electric, the amounts are included in Other Assets — Other on the Consolidated Statements of Financial Position.

Schedule of Roll-Forward of Activity for Financing Receivables Credit Loss Reserves

The following tables present a roll-forward of the activity for the Registrants' financing receivables credit loss reserves:

	DTE Energy						DTE Electric
	Trade accounts receivable		Other receivables		Total		Trade and other accounts receivable
	(In millions)
Beginning reserve balance, January 1, 2025	$	69	$	3	$	72	$	46
Current period provision	25		—		25		10
Write-offs charged against allowance	(29)		—		(29)		(19)
Recoveries of amounts previously written off	9		—		9		6
Ending reserve balance, March 31, 2025	$	74	$	3	$	77	$	43

	DTE Energy						DTE Electric
	Trade accounts receivable		Other receivables		Total		Trade and other accounts receivable
	(In millions)
Beginning reserve balance, January 1, 2024	$	62	$	1	$	63	$	41
Current period provision	74		2		76		49
Write-offs charged against allowance	(108)		—		(108)		(70)
Recoveries of amounts previously written off	41		—		41		26
Ending reserve balance, December 31, 2024	$	69	$	3	$	72	$	46

Schedule of Uncollectible Expense

Uncollectible expense for the Registrants is primarily comprised of the current period provision for allowance for doubtful accounts and is summarized as follows:

	Three Months Ended March 31,
	2025		2024
	(In millions)
DTE Energy	$	26	$	21
DTE Electric	$	10	$	10