Retirement Benefits and Trusteed Assets (Details Textuals) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Pension plans
Defined Benefit Plan Disclosure [Line Items]
Pension credit	$ 4,000,000	$ 14,000,000	$ 9,000,000	$ 31,000,000
Anticipated contributions, current fiscal year	0		0
Postretirement benefit plans
Defined Benefit Plan Disclosure [Line Items]
Pension credit	11,000,000	10,000,000	22,000,000	19,000,000
Anticipated contributions, current fiscal year	0		0
DTE Electric | Pension plans
Defined Benefit Plan Disclosure [Line Items]
Pension credit	2,000,000	7,000,000	3,000,000	16,000,000
DTE Electric | Postretirement benefit plans
Defined Benefit Plan Disclosure [Line Items]
Pension credit	$ 6,000,000	$ 6,000,000	$ 12,000,000	$ 12,000,000