Property, Plant, and Equipment (Depreciation and Amortization) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	$ 1,316	$ 1,239	$ 1,148
Regulatory assets and liabilities	394	344	297
Intangible assets	16	15	16
Other	6	8	7
Depreciation and amortization	1,732	1,606	1,468
DTE Electric
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment	1,089	1,029	951
Regulatory assets and liabilities	338	292	248
Other	5	5	5
Depreciation and amortization	$ 1,432	$ 1,326	$ 1,204