Property, Plant, and Equipment (Property, Plant and Equipment by Classification) (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	$ 44,623	$ 40,840
Accumulated depreciation and amortization	(10,970)	(9,947)
Total Property	33,653	30,893
DTE Vantage
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	1,191	1,135
Accumulated depreciation and amortization	(564)	(520)
Other
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	413	272
Accumulated depreciation and amortization	(95)	(78)
DTE Electric
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	33,807	30,801
Accumulated depreciation and amortization	(8,239)	(7,404)
Total Property	25,568	23,397
DTE Electric | Distribution
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	16,316	14,995
Accumulated depreciation and amortization	(3,729)	(3,513)
DTE Electric | Dispatchable generation
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	8,647	8,428
Accumulated depreciation and amortization	(2,584)	(2,146)
DTE Electric | Renewable generation
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	5,102	3,933
Accumulated depreciation and amortization	(760)	(615)
DTE Electric | Other
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	3,742	3,445
Accumulated depreciation and amortization	(1,166)	(1,130)
DTE Gas
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	9,212	8,632
Accumulated depreciation and amortization	(2,072)	(1,945)
DTE Gas | Distribution
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	6,826	6,334
Accumulated depreciation and amortization	(1,413)	(1,319)
DTE Gas | Other
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	530	500
Accumulated depreciation and amortization	(228)	(210)
DTE Gas | Transmission
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	1,267	1,212
Accumulated depreciation and amortization	(291)	(278)
DTE Gas | Storage
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	589	586
Accumulated depreciation and amortization	$ (140)	$ (138)