Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2023

Regulatory Assets and Liabilities Disclosure [Abstract]

Schedule of Regulatory Assets

The following are balances and a brief description of the Registrants' Regulatory assets and liabilities at December 31:

	DTE Energy				DTE Electric
	2023		2022		2023		2022
Assets	(In millions)
Recoverable undepreciated costs on retiring plants	$	2,736	$	594	$	2,736	$	594
Recoverable pension and other postretirement costs
Pension	1,421		1,362		1,045		997
Other postretirement costs	163		172		67		60
Fermi 2 asset retirement obligation	952		972		952		972
Removal costs asset	223		19		223		19
Enhanced tree trimming program deferred costs	157		90		157		90
Recoverable Michigan income taxes	133		148		110		121
Energy Waste Reduction incentive	90		88		72		71
Recoverable income taxes related to AFUDC equity	89		76		80		68
Accrued PSCR/GCR revenue	55		450		55		421
Deferred environmental costs	46		46		—		—
Unamortized loss on reacquired debt	41		45		31		34
Customer360 deferred costs	38		42		38		42
Advanced distribution management system costs	18		14		18		14
Deferred pension costs	16		63		10		41
Nuclear performance evaluation and review committee tracker	6		26		6		26
Other	133		129		95		70
	6,317		4,336		5,695		3,640
Less amount included in Current Assets	(108)		(450)		(99)		(421)
	$	6,209	$	3,886	$	5,596	$	3,219
Securitized regulatory assets	$	758	$	206	$	758	$	206

Schedule of Regulatory Liabilities

	DTE Energy				DTE Electric
	2023		2022		2023		2022
Liabilities	(In millions)
Refundable federal income taxes	$	1,823	$	1,908	$	1,463	$	1,534
Removal costs liability	342		371		—		—
Negative other postretirement offset	210		191		142		128
Non-service pension and other postretirement costs	199		154		84		73
Accrued GCR refund	21		—		—		—
Renewable energy	7		21		7		21
Other	72		62		63		55
	2,674		2,707		1,759		1,811
Less amount included in Current Liabilities	(71)		(34)		(49)		(33)
	$	2,603	$	2,673	$	1,710	$	1,778