Income Taxes (Reconciliation of Income Tax Expense to the Statutory Federal Income Tax Rate) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income Before Income Taxes	$ 1,112	$ 656	$ 1,082
Income tax expense at 21% statutory rate	234	138	227
TCJA regulatory liability amortization	(155)	(103)	(76)
Production tax credits	(91)	(138)	(121)
Net operating loss carryback	(5)	0	(34)
State deferred tax remeasurement due to separation of DT Midstream, net of federal benefit	0	(85)	0
Enactment of West Virginia income tax legislation, net of federal benefit	0	8	0
Deferred intercompany gain	0	9	0
Valuation allowance on charitable contribution carryforwards	9	18	3
State and local income taxes, excluding items above, net of federal benefit	42	30	47
Other, net	(5)	(7)	(9)
Income Tax Expense (Benefit)	$ 29	$ (130)	$ 37
Effective income tax rate	2.60%	(19.90%)	3.40%
DTE Electric
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income Before Income Taxes	$ 981	$ 970	$ 887
Income tax expense at 21% statutory rate	206	204	186
TCJA regulatory liability amortization	(145)	(73)	(62)
Production tax credits	(83)	(70)	(55)
State and local income taxes, excluding items above, net of federal benefit	56	54	50
Other, net	(8)	(11)	(10)
Income Tax Expense (Benefit)	$ 26	$ 104	$ 109
Effective income tax rate	2.70%	10.70%	12.30%