Long-Term Debt (Scheduled Debt Maturities) (Details) $ in Millions	Dec. 31, 2024 USD ($)
Maturities of Long-term Debt [Abstract]
2025	$ 1,291
2026	1,351
2027	1,430
2028	1,737
2029	1,962
2030 and Thereafter	14,367
Long-term debt, total	22,138
DTE Electric
Maturities of Long-term Debt [Abstract]
2025	421
2026	751
2027	39
2028	617
2029	103
2030 and Thereafter	10,052
Long-term debt, total	$ 11,983

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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