Long-Term Debt (Scheduled Interest Payments) (Details) $ in Millions	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
2024	$ 749
2025	668
2026	651
2027	623
2028	589
2029 and Thereafter	8,412
Total	11,692
DTE Electric
Debt Instrument [Line Items]
2024	432
2025	427
2026	416
2027	408
2028	400
2029 and Thereafter	5,150
Total	$ 7,233