Short-Term Credit Arrangements and Borrowings (Details Textuals)	1 Months Ended
	Apr. 24, 2019 USD ($)	Mar. 31, 2019 USD ($)	Feb. 28, 2019 USD ($)	Dec. 31, 2018 USD ($)
Short-term Debt [Line Items]
Maximum borrowing capacity		$ 2,120,000,000
Other outstanding letters of credit		351,000,000
Letter of credit
Short-term Debt [Line Items]
Other outstanding letters of credit		195,000,000
Unsecured letter of credit facility, expiring in February 2021 | Letter of credit
Short-term Debt [Line Items]
Maximum borrowing capacity		150,000,000
Unsecured revolving credit facility, expiring April 2022 | Revolving credit facility
Short-term Debt [Line Items]
Maximum borrowing capacity		$ 1,900,000,000
Unsecured revolving credit facility, expiring April 2024 | Revolving credit facility | Subsequent event
Short-term Debt [Line Items]
Term of credit agreement	5 years
DTE Electric
Short-term Debt [Line Items]
Ratio of indebtedness to net capital		0.51
Maximum borrowing capacity		$ 400,000,000
Other outstanding letters of credit		0
DTE Electric | Letter of credit
Short-term Debt [Line Items]
Other outstanding letters of credit		0
DTE Electric | Unsecured letter of credit facility, expiring in February 2021 | Letter of credit
Short-term Debt [Line Items]
Maximum borrowing capacity		0
DTE Electric | Unsecured revolving credit facility, expiring April 2022 | Revolving credit facility
Short-term Debt [Line Items]
Maximum borrowing capacity		$ 400,000,000
DTE Electric | Unsecured revolving credit facility, expiring April 2024 | Revolving credit facility | Subsequent event
Short-term Debt [Line Items]
Maximum borrowing capacity	$ 500,000,000
DTE Gas
Short-term Debt [Line Items]
Ratio of indebtedness to net capital		0.46
Maximum borrowing capacity		$ 300,000,000
Other outstanding letters of credit		79,000,000
DTE Gas | Letter of credit
Short-term Debt [Line Items]
Other outstanding letters of credit		0
DTE Gas | Unsecured letter of credit facility, expiring in February 2021 | Letter of credit
Short-term Debt [Line Items]
Maximum borrowing capacity		0
DTE Gas | Unsecured revolving credit facility, expiring April 2022 | Revolving credit facility
Short-term Debt [Line Items]
Maximum borrowing capacity		$ 300,000,000
DTE Energy
Short-term Debt [Line Items]
Ratio of indebtedness to net capital		0.55
Maximum borrowing capacity		$ 1,420,000,000
Other outstanding letters of credit		272,000,000
DTE Energy | Letter of credit
Short-term Debt [Line Items]
Other outstanding letters of credit		195,000,000
DTE Energy | Demand financing agreement
Short-term Debt [Line Items]
Maximum borrowing capacity, financing agreement		100,000,000
Maximum additional margin financing		50,000,000
Amount outstanding		79,000,000		$ 93,000,000
DTE Energy | Demand financing agreement plus letter of credit
Short-term Debt [Line Items]
Maximum borrowing capacity, financing agreement		150,000,000
DTE Energy | Unsecured letter of credit facility, expiring in February 2021 | Letter of credit
Short-term Debt [Line Items]
Maximum borrowing capacity		150,000,000	$ 150,000,000
DTE Energy | Unsecured revolving credit facility, expiring April 2022 | Revolving credit facility
Short-term Debt [Line Items]
Maximum borrowing capacity		1,200,000,000
DTE Energy | Unsecured revolving credit facility, expiring April 2024 | Revolving credit facility | Subsequent event
Short-term Debt [Line Items]
Maximum borrowing capacity	$ 1,500,000,000
DTE Energy | Other outstanding letters of credit | Letter of credit
Short-term Debt [Line Items]
Other outstanding letters of credit		$ 9,000,000
Maximum
Short-term Debt [Line Items]
Ratio of indebtedness to net capital		0.65