Long-Term Debt (Scheduled Debt Maturities) (Details) $ in Millions	Dec. 31, 2021 USD ($)
Maturities of Long-term Debt [Abstract]
2022	$ 2,866
2023	277
2024	1,075
2025	1,220
2026	777
2027 and Thereafter	11,302
Long-term debt, total	17,517
DTE Electric
Maturities of Long-term Debt [Abstract]
2022	316
2023	202
2024	400
2025	350
2026	177
2027 and Thereafter	7,543
Long-term debt, total	$ 8,988

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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