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Property, Plant, and Equipment (Tables)
 12 Months Ended
Dec. 31, 2025
Property, Plant and Equipment [Abstract]  
Schedule of Property, Plant and Equipment by Classification and Depreciation and Amortization Expense
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 
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 
Schedule of AFUDC and Capitalized Interest Rates
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 %
Schedule of AFUDC and Interest Capitalized
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 
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, 2025 follows:
Estimated Useful Lives in Years
UtilityDistributionGenerationTransmissionStorage
DTE Electric3832N/AN/A
DTE Gas55N/A6760
Schedule of Capitalized Software
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