Property, Plant, and Equipment (Tables)

12 Months Ended

Dec. 31, 2022

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:

	2022		2021
Property, plant, and equipment	(In millions)
DTE Electric
Zero carbon generation
Nuclear	$	3,684	$	3,394
Renewables	2,567		2,522
Fossil and other generation	8,789		8,640
Distribution	12,502		11,414
Other	3,049		2,879
Total DTE Electric	30,591		28,849
DTE Gas
Distribution	5,376		4,900
Storage	607		593
Transmission and other	1,534		1,415
Total DTE Gas	7,517		6,908
DTE Vantage	1,059		1,118
Other	179		208
Total DTE Energy	$	39,346	$	37,083
Accumulated depreciation and amortization
DTE Electric
Zero carbon generation
Nuclear	$	(428)	$	(413)
Renewables	(426)		(357)
Fossil and other generation	(3,352)		(3,214)
Distribution	(3,040)		(2,842)
Other	(849)		(850)
Total DTE Electric	(8,095)		(7,676)
DTE Gas
Distribution	(1,330)		(1,265)
Storage	(163)		(154)
Transmission and other	(461)		(426)
Total DTE Gas	(1,954)		(1,845)
DTE Vantage	(469)		(545)
Other	(61)		(73)
Total DTE Energy	$	(10,579)	$	(10,139)
Net DTE Energy Property, plant, and equipment	$	28,767	$	26,944
Net DTE Electric Property, plant, and equipment	$	22,496	$	21,173

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

	2022		2021		2020
	(In millions)
Property, plant, and equipment	$	1,148	$	1,095	$	1,025
Regulatory assets and liabilities	297		259		244
Intangible assets	16		16		16
Other	7		7		7
	$	1,468	$	1,377	$	1,292

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

	2022		2021		2020
	(In millions)
Property, plant, and equipment	$	951	$	890	$	831
Regulatory assets and liabilities	248		214		207
Other	5		5		5
	$	1,204	$	1,109	$	1,043

Schedule of AFUDC and Capitalized Interest Rates

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

	2022		2021		2020
DTE Electric AFUDC	5.46	%	5.46	%	5.47	%
DTE Gas AFUDC	5.41	%	5.55	%	5.56	%
Non-regulated businesses capitalized interest	3.00	%	3.30	%	3.90	%

Schedule of AFUDC and Interest Capitalized

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

	2022		2021		2020
DTE Energy	(In millions)
Allowance for debt funds used during construction and interest capitalized	$	13	$	12	$	11
Allowance for equity funds used during construction	29		27		25
Total	$	42	$	39	$	36

	2022		2021		2020
DTE Electric	(In millions)
Allowance for debt funds used during construction	$	11	$	11	$	10
Allowance for equity funds used during construction	26		25		23
Total	$	37	$	36	$	33

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, 2022 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,
	2022		2021		2020
	(In millions)
Amortization expense of capitalized software	$	159	$	145	$	128
Gross carrying value of capitalized software	$	796	$	920
Accumulated amortization of capitalized software	$	406	$	493

The following balances for capitalized software relate to DTE Electric:

	Year Ended December 31,
	2022		2021		2020
	(In millions)
Amortization expense of capitalized software	$	146	$	132	$	118
Gross carrying value of capitalized software	$	692	$	826
Accumulated amortization of capitalized software	$	343	$	439