Income Taxes (Components of Income Tax Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current income tax expense (benefit)
Federal	$ (13)	$ (33)	$ (249)
State and other income tax	(2)	(12)	4
Total current income taxes	(15)	(45)	(245)
Deferred income tax expense (benefit)
Federal	(13)	(42)	227
State and other income tax	57	(43)	55
Total deferred income taxes	44	(85)	282
Income Tax Expense (Benefit)	29	(130)	37
DTE Electric
Current income tax expense (benefit)
Federal	1	(11)	15
State and other income tax	0	(7)	5
Total current income taxes	1	(18)	20
Deferred income tax expense (benefit)
Federal	(46)	47	30
State and other income tax	71	75	59
Total deferred income taxes	25	122	89
Income Tax Expense (Benefit)	$ 26	$ 104	$ 109