Long-Term Debt (Scheduled Interest Payments) (Details) $ in Millions	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
2023	$ 669
2024	601
2025	511
2026	495
2027	469
2028 and Thereafter	7,712
Total	10,457
DTE Electric
Debt Instrument [Line Items]
2023	357
2024	340
2025	325
2026	316
2027	310
2028 and Thereafter	4,375
Total	$ 6,023