Leases (Details Textuals) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Finance lease agreement, term (less than)	2 years
Net investment in finance lease arrangement	$ 8
Selling profit recognized	11
Net investment in finance lease arrangement	$ 133
Percent ownership interest in Vector Pipeline	40.00%
Net investment in finance leases	$ 178
Depreciation expense associated with property under operating leases	27	$ 26
Interest income recognized under finance leases	16	5
Vector | Equity Method Investee
Lessee, Lease, Description [Line Items]
Net investment in finance leases	39
Interest income recognized under finance leases	$ 4	$ 4
Minimum
Lessee, Lease, Description [Line Items]
Lease terms	2 years
Term of operating lease contracts	2 years
Maximum
Lessee, Lease, Description [Line Items]
Lease terms	40 years
Term of operating lease contracts	24 years
DTE Electric | Minimum
Lessee, Lease, Description [Line Items]
Lease terms	2 years
DTE Electric | Maximum
Lessee, Lease, Description [Line Items]
Lease terms	40 years