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Property, Plant, and Equipment
 12 Months Ended
Dec. 31, 2025
Property, Plant and Equipment [Abstract]  
Property, Plant, and Equipment PROPERTY, PLANT, AND EQUIPMENT
The following is a summary of Property, plant, and equipment by classification as of December 31:
20252024
Property, plant, and equipment(In millions)
DTE Electric
Distribution$16,316 $14,995 
Dispatchable generation8,647 8,428 
Renewable generation5,102 3,933 
Other3,742 3,445 
Total DTE Electric33,807 30,801 
DTE Gas
Distribution6,826 6,334 
Transmission1,267 1,212 
Storage589 586 
Other530 500 
Total DTE Gas9,212 8,632 
DTE Vantage1,191 1,135 
Other413 272 
Total DTE Energy$44,623 $40,840 
Accumulated depreciation and amortization
DTE Electric
Distribution$(3,729)$(3,513)
Dispatchable generation(2,584)(2,146)
Renewable generation(760)(615)
Other(1,166)(1,130)
Total DTE Electric(8,239)(7,404)
DTE Gas
Distribution(1,413)(1,319)
Transmission(291)(278)
Storage(140)(138)
Other(228)(210)
Total DTE Gas(2,072)(1,945)
DTE Vantage(564)(520)
Other(95)(78)
Total DTE Energy$(10,970)$(9,947)
Net DTE Energy Property, plant, and equipment$33,653 $30,893 
Net DTE Electric Property, plant, and equipment$25,568 $23,397 
AFUDC and Capitalized Interest
AFUDC represents the cost of financing construction projects for regulated businesses, including the estimated cost of debt and authorized return on equity. The debt component is recorded as a reduction to Interest expense and the equity component is recorded as Other income on the Registrants' Consolidated Statements of Operations. Non-regulated businesses record capitalized interest as a reduction to Interest expense.
The AFUDC and capitalized interest rates were as follows for the years ended December 31:
202520242023
DTE Electric AFUDC6.01 %5.56 %5.53 %
DTE Gas AFUDC5.80 %5.45 %5.41 %
Non-regulated businesses capitalized interest4.50 %4.25 %3.00 %
The following is a summary of AFUDC and interest capitalized for the years ended December 31:
202520242023
DTE Energy(In millions)
Allowance for debt funds used during construction and interest capitalized$47 $36 $20 
Allowance for equity funds used during construction105 86 42 
Total$152 $122 $62 
202520242023
DTE Electric(In millions)
Allowance for debt funds used during construction$45 $34 $15 
Allowance for equity funds used during construction103 84 40 
Total$148 $118 $55 
Depreciation and Amortization
The composite depreciation rate for DTE Electric was approximately 3.6% in 2025, 4.2% in 2024, and 4.4% in 2023. The composite depreciation rate for DTE Gas was 2.8% in 2025 and 2.9% in 2024 and 2023. The average estimated useful life for each major class of utility Property, plant, and equipment as of December 31, 2025 follows:
Estimated Useful Lives in Years
UtilityDistributionGenerationTransmissionStorage
DTE Electric3832N/AN/A
DTE Gas55N/A6760
The estimated useful lives for DTE Electric's Other utility assets range from 3 to 45 years, while the estimated useful lives for DTE Gas' Other utility assets range from 3 to 39 years. The estimated useful lives for major classes of DTE Energy's non-utility assets and facilities range from 3 to 50 years.
The following is a summary of Depreciation and amortization expense for DTE Energy:
Year Ended December 31,
202520242023
(In millions)
Property, plant, and equipment$1,265 $1,316 $1,239 
Regulatory assets and liabilities550 394 344 
Intangible assets18 16 15 
Other8 6 8 
$1,841 $1,732 $1,606 
The following is a summary of Depreciation and amortization expense for DTE Electric:
Year Ended December 31,
202520242023
(In millions)
Property, plant, and equipment$1,039 $1,089 $1,029 
Regulatory assets and liabilities486 338 292 
Other5 5 5 
$1,530 $1,432 $1,326 
Capitalized Software
Capitalized software costs are classified as Property, plant, and equipment and the related amortization is included in Accumulated depreciation and amortization on the Registrants' Consolidated Statements of Financial Position. The Registrants capitalize the costs associated with computer software developed or obtained for use in their businesses. The Registrants amortize capitalized software costs on a straight-line basis over the expected period of benefit, ranging from 3 to 15 years for both DTE Energy and DTE Electric.
The following balances for capitalized software relate to DTE Energy:
Year Ended December 31,
202520242023
(In millions)
Amortization expense of capitalized software$164 $192 $189 
Gross carrying value of capitalized software$1,211 $1,005 
Accumulated amortization of capitalized software$474 $476 
The following balances for capitalized software relate to DTE Electric:
Year Ended December 31,
202520242023
(In millions)
Amortization expense of capitalized software$146 $175 $172 
Gross carrying value of capitalized software$1,084 $910 
Accumulated amortization of capitalized software$399 $414