Long-Term Financings (Interest Payments Related to Long-term Debt) (Details) $ in Millions	Dec. 31, 2025 USD ($)
Debt Instrument [Line Items]
2026	$ 1,127
2027	1,039
2028	963
2029	879
2030	790
2031 and Thereafter	11,465
Total	16,263
DTE Electric
Debt Instrument [Line Items]
2026	557
2027	518
2028	504
2029	496
2030	484
2031 and Thereafter	5,637
Total	$ 8,196