Long-Term Debt (Scheduled Interest Payments) (Details) $ in Millions	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
2025	$ 905
2026	888
2027	806
2028	742
2029	664
2030 and Thereafter	8,467
Total	12,472
DTE Electric
Debt Instrument [Line Items]
2025	477
2026	466
2027	434
2028	426
2029	418
2030 and Thereafter	4,874
Total	$ 7,095