Property, Plant, and Equipment (Tables)

12 Months Ended

Dec. 31, 2023

Property, Plant and Equipment [Abstract]

PP&E by Classification, Summary of Depreciation and Amortization

The following is a summary of Property, plant, and equipment by classification as of December 31:

	2023		2022
Property, plant, and equipment	(In millions)
DTE Electric
Zero carbon generation
Nuclear	$	3,812	$	3,684
Renewables	3,074		2,567
Fossil and other generation	4,157		8,789
Distribution	13,673		12,502
Other	3,220		3,049
Total DTE Electric	27,936		30,591
DTE Gas
Distribution	5,838		5,376
Storage	578		607
Transmission and other	1,613		1,534
Total DTE Gas	8,029		7,517
DTE Vantage	1,075		1,059
Other	234		179
Total DTE Energy	$	37,274	$	39,346
Accumulated depreciation and amortization
DTE Electric
Zero carbon generation
Nuclear	$	(479)	$	(428)
Renewables	(524)		(426)
Fossil and other generation	(1,393)		(3,352)
Distribution	(3,205)		(3,040)
Other	(969)		(849)
Total DTE Electric	(6,570)		(8,095)
DTE Gas
Distribution	(1,365)		(1,330)
Storage	(132)		(163)
Transmission and other	(493)		(461)
Total DTE Gas	(1,990)		(1,954)
DTE Vantage	(479)		(469)
Other	(66)		(61)
Total DTE Energy	$	(9,105)	$	(10,579)
Net DTE Energy Property, plant, and equipment	$	28,169	$	28,767
Net DTE Electric Property, plant, and equipment	$	21,366	$	22,496

The following is a summary of Depreciation and amortization expense for DTE Energy:

	2023		2022		2021
	(In millions)
Property, plant, and equipment	$	1,239	$	1,148	$	1,095
Regulatory assets and liabilities	344		297		259
Intangible assets	15		16		16
Other	8		7		7
	$	1,606	$	1,468	$	1,377

The following is a summary of Depreciation and amortization expense for DTE Electric:

	2023		2022		2021
	(In millions)
Property, plant, and equipment	$	1,029	$	951	$	890
Regulatory assets and liabilities	292		248		214
Other	5		5		5
	$	1,326	$	1,204	$	1,109

Schedule of AFUDC and Capitalized Interest Rates

The AFUDC and capitalized interest rates were as follows for the years ended December 31:

	2023		2022		2021
DTE Electric AFUDC	5.53	%	5.46	%	5.46	%
DTE Gas AFUDC	5.41	%	5.41	%	5.55	%
Non-regulated businesses capitalized interest	3.00	%	3.00	%	3.30	%

Schedule of AFUDC and Interest Capitalized

The following is a summary of AFUDC and interest capitalized for the years ended December 31:

	2023		2022		2021
DTE Energy	(In millions)
Allowance for debt funds used during construction and interest capitalized	$	20	$	13	$	12
Allowance for equity funds used during construction	42		29		27
Total	$	62	$	42	$	39

	2023		2022		2021
DTE Electric	(In millions)
Allowance for debt funds used during construction	$	15	$	11	$	11
Allowance for equity funds used during construction	40		26		25
Total	$	55	$	37	$	36

Schedule of Utility Property, Plant, and Equipment

The average estimated useful life for each major class of utility Property, plant, and equipment as of December 31, 2023 follows:

	Estimated Useful Lives in Years
Utility	Generation	Distribution	Storage
DTE Electric	34	38	N/A
DTE Gas	N/A	49	58

Schedule of Capitalized Software

The following balances for capitalized software relate to DTE Energy:

	Year Ended December 31,
	2023		2022		2021
	(In millions)
Amortization expense of capitalized software	$	189	$	159	$	145
Gross carrying value of capitalized software	$	940	$	796
Accumulated amortization of capitalized software	$	427	$	406

The following balances for capitalized software relate to DTE Electric:

	Year Ended December 31,
	2023		2022		2021
	(In millions)
Amortization expense of capitalized software	$	172	$	146	$	132
Gross carrying value of capitalized software	$	849	$	692
Accumulated amortization of capitalized software	$	369	$	343