Short-Term Credit Arrangements and Borrowings (Details Textuals)	Dec. 31, 2021 USD ($)	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020 USD ($)
Short-term Debt [Line Items]
Face amount	$ 4,535,000,000
Amount outstanding	$ 758,000,000			$ 38,000,000
Weighted average interest rate	0.30%			1.10%
Dividend restriction	$ 1,400,000,000
Retained earnings	3,438,000,000			$ 7,156,000,000
Effective limitations	$ 0
DTE Electric
Short-term Debt [Line Items]
Total funded debt to capitalization ratio	0.51
Weighted average interest rate	0.20%
Short-term borrowings	$ 153,000,000			0
Retained earnings	$ 2,901,000,000			2,623,000,000
DTE Gas
Short-term Debt [Line Items]
Total funded debt to capitalization ratio	0.48
DTE Energy
Short-term Debt [Line Items]
Total funded debt to capitalization ratio	0.66
DTE Energy | Demand financing agreement
Short-term Debt [Line Items]
Maximum borrowing capacity	$ 250,000,000
Amount outstanding	103,000,000			$ 49,000,000
Maximum
Short-term Debt [Line Items]
Total funded debt to capitalization ratio		0.70	0.65
Unsecured term loan, expiring June 2022 | Unsecured term loan
Short-term Debt [Line Items]
Face amount	400,000,000
Amount outstanding	0
Demand financing agreement, indefinite term | DTE Energy | Demand financing agreement
Short-term Debt [Line Items]
Maximum borrowing capacity	50,000,000
Additional margin financing	50,000,000
Demand financing agreement, expiring in 2022 | DTE Energy | Demand financing agreement
Short-term Debt [Line Items]
Maximum borrowing capacity	$ 150,000,000