Income Taxes (Components of Income Tax Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current income tax benefit
Federal	$ (226)	$ (10)	$ (13)
State and other income tax	(2)	(2)	(2)
Total current income taxes	(228)	(12)	(15)
Deferred income tax expense (benefit)
Federal	117	103	(13)
State and other income tax	77	78	57
Total deferred income taxes	194	181	44
Income Tax Expense (Benefit)	(34)	169	29
DTE Electric
Current income tax benefit
Federal	(228)	1	1
State and other income tax	0	(5)	0
Total current income taxes	(228)	(4)	1
Deferred income tax expense (benefit)
Federal	124	19	(46)
State and other income tax	72	63	71
Total deferred income taxes	196	82	25
Income Tax Expense (Benefit)	$ (32)	$ 78	$ 26