Leases (Other Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash paid for amounts included in the measurement of these liabilities:
Operating cash flows for finance leases	$ 8	$ 8	$ 3
Operating cash flows for operating leases	17	19	22
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	5	5	2
Finance leases	$ 3	$ 3	$ 19
Weighted Average Remaining Lease Term (Years)
Operating leases	12 years 9 months 18 days	12 years 8 months 12 days	12 years 1 month 6 days
Finance leases	8 years 2 months 12 days	7 years 9 months 18 days	7 years 7 months 6 days
Weighted Average Discount Rate
Operating leases	3.70%	3.60%	3.60%
Finance leases	2.40%	2.20%	2.00%
DTE Electric
Cash paid for amounts included in the measurement of these liabilities:
Operating cash flows for finance leases	$ 7	$ 7	$ 2
Operating cash flows for operating leases	12	14	14
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	2	1	0
Finance leases	$ 1	$ 1	$ 14
Weighted Average Remaining Lease Term (Years)
Operating leases	11 years 1 month 6 days	10 years 3 months 18 days	10 years 4 months 24 days
Finance leases	1 year 1 month 6 days	2 years 1 month 6 days	3 years 1 month 6 days
Weighted Average Discount Rate
Operating leases	3.40%	3.40%	3.30%
Finance leases	1.00%	1.00%	1.00%