Property, Plant, and Equipment (Depreciation and Amortization) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant, and Equipment [Line Items]
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
Depreciation and amortization	1,468	1,377	1,292
DTE Electric
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	951	890	831
Regulatory assets and liabilities	248	214	207
Other	5	5	5
Depreciation and amortization	$ 1,204	$ 1,109	$ 1,043