Short-Term Credit Arrangements and Borrowings (Details Textuals)	Jul. 28, 2020 USD ($)	Jun. 30, 2020 USD ($)	May 31, 2020 CAD ($)	Apr. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Short-term Debt [Line Items]
Face amount of loan		$ 1,700,000,000
Maximum borrowing capacity		3,808,000,000
Amounts outstanding		1,115,000,000
Unsecured term loan
Short-term Debt [Line Items]
Amounts outstanding		800,000,000
Revolving credit facility
Short-term Debt [Line Items]
Amounts outstanding		114,000,000
Letters of credit
Short-term Debt [Line Items]
Amounts outstanding		201,000,000
Unsecured Term Loan, Expiring March 2021 | Unsecured term loan
Short-term Debt [Line Items]
Face amount of loan					$ 500,000,000
Amount drawn		500,000,000
Maximum borrowing capacity		500,000,000
Unsecured Term Loan, Expiring April 2021 | Unsecured term loan
Short-term Debt [Line Items]
Maximum borrowing capacity		500,000,000
Unsecured Canadian Revolving Credit Facility, Expiring May 2023 | Revolving credit facility
Short-term Debt [Line Items]
Maximum borrowing capacity		81,000,000
Unsecured Term Loan, Expiring June 2021 | Unsecured term loan
Short-term Debt [Line Items]
Face amount of loan		167,000,000
Amount drawn		0
Maximum borrowing capacity		167,000,000
DTE Energy
Short-term Debt [Line Items]
Maximum borrowing capacity		2,508,000,000
Amounts outstanding		$ 815,000,000
Ratio of indebtedness to net capital		0.60
DTE Energy | Unsecured term loan
Short-term Debt [Line Items]
Amounts outstanding		$ 500,000,000
DTE Energy | Revolving credit facility
Short-term Debt [Line Items]
Amounts outstanding		114,000,000
DTE Energy | Letters of credit
Short-term Debt [Line Items]
Amounts outstanding		201,000,000
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		70,000,000				$ 114,000,000
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 Term Loan, Expiring March 2021 | Unsecured term loan
Short-term Debt [Line Items]
Maximum borrowing capacity		500,000,000
DTE Energy | Unsecured Term Loan, Expiring April 2021 | Unsecured term loan
Short-term Debt [Line Items]
Maximum borrowing capacity		0
DTE Energy | Unsecured Canadian Revolving Credit Facility, Expiring May 2023 | Revolving credit facility
Short-term Debt [Line Items]
Maximum borrowing capacity		81,000,000
DTE Energy | Unsecured Term Loan, Expiring June 2021 | Unsecured term loan
Short-term Debt [Line Items]
Maximum borrowing capacity		167,000,000
DTE Energy | Other outstanding letters of credit | Letters of credit
Short-term Debt [Line Items]
Amounts outstanding		$ 9,000,000
DTE Energy | Uncommitted letter of credit facility, Expiring July 2021 | Letters of credit | Subsequent Event
Short-term Debt [Line Items]
Maximum borrowing capacity	$ 50,000,000
Amounts outstanding	$ 0
Maximum
Short-term Debt [Line Items]
Ratio of indebtedness to net capital		0.65
DTE Electric
Short-term Debt [Line Items]
Maximum borrowing capacity		$ 900,000,000
Amounts outstanding		$ 200,000,000
Ratio of indebtedness to net capital		0.55
DTE Electric | Unsecured term loan
Short-term Debt [Line Items]
Amounts outstanding		$ 200,000,000
DTE Electric | Revolving credit facility
Short-term Debt [Line Items]
Amounts outstanding		0
DTE Electric | Letters of credit
Short-term Debt [Line Items]
Amounts outstanding		0
DTE Electric | Unsecured Term Loan, Expiring March 2021 | Unsecured term loan
Short-term Debt [Line Items]
Maximum borrowing capacity		0
DTE Electric | Unsecured Term Loan, Expiring April 2021, Funded | Unsecured term loan
Short-term Debt [Line Items]
Face amount of loan				$ 200,000,000
Amount drawn		200,000,000
DTE Electric | Unsecured Term Loan, Expiring April 2021, Unfunded | Unsecured term loan
Short-term Debt [Line Items]
Face amount of loan				200,000,000
Amount drawn		0
DTE Electric | Unsecured Term Loan, Expiring April 2021 | Unsecured term loan
Short-term Debt [Line Items]
Maximum borrowing capacity		400,000,000
DTE Electric | Unsecured Canadian Revolving Credit Facility, Expiring May 2023 | Revolving credit facility
Short-term Debt [Line Items]
Maximum borrowing capacity		0
DTE Electric | Unsecured Term Loan, Expiring June 2021 | Unsecured term loan
Short-term Debt [Line Items]
Maximum borrowing capacity		0
DTE Gas
Short-term Debt [Line Items]
Maximum borrowing capacity		400,000,000
Amounts outstanding		$ 100,000,000
Ratio of indebtedness to net capital		0.47
DTE Gas | Unsecured term loan
Short-term Debt [Line Items]
Amounts outstanding		$ 100,000,000
DTE Gas | Revolving credit facility
Short-term Debt [Line Items]
Amounts outstanding		0
DTE Gas | Letters of credit
Short-term Debt [Line Items]
Amounts outstanding		0
DTE Gas | Unsecured Term Loan, Expiring March 2021 | Unsecured term loan
Short-term Debt [Line Items]
Maximum borrowing capacity		0
DTE Gas | Unsecured Term Loan, Expiring April 2021 | Unsecured term loan
Short-term Debt [Line Items]
Face amount of loan				100,000,000
Amount drawn				$ 100,000,000
Maximum borrowing capacity		100,000,000
DTE Gas | Unsecured Canadian Revolving Credit Facility, Expiring May 2023 | Revolving credit facility
Short-term Debt [Line Items]
Maximum borrowing capacity		0
DTE Gas | Unsecured Term Loan, Expiring June 2021 | Unsecured term loan
Short-term Debt [Line Items]
Maximum borrowing capacity		$ 0
DTE Lake Erie Generation, Inc | Unsecured Canadian Revolving Credit Facility, Expiring May 2023 | Revolving credit facility
Short-term Debt [Line Items]
Maximum borrowing capacity			$ 110,000,000
Amounts outstanding			$ 19,000,000