Leases (Future Minimum Lease Payments) (Details) $ in Millions	Dec. 31, 2022 USD ($)
Operating Leases
2023	$ 14
2024	12
2025	9
2026	8
2027	7
2028 and thereafter	51
Total future minimum lease payments	101
Imputed interest	(20)
Lease liabilities	81
Finance Leases
2023	8
2024	3
2025	1
2026	1
2027	1
2028 and thereafter	7
Total future minimum lease payments	21
Imputed interest	(2)
Lease liabilities	19
DTE Electric
Operating Leases
2023	10
2024	8
2025	6
2026	5
2027	4
2028 and thereafter	25
Total future minimum lease payments	58
Imputed interest	(10)
Lease liabilities	48
Finance Leases
2023	6
2024	1
2025	0
2026	0
2027	0
2028 and thereafter	0
Total future minimum lease payments	7
Imputed interest	0
Lease liabilities	$ 7