Short-Term Credit Arrangements and Borrowings (Details) $ in Millions	Mar. 31, 2023 USD ($)
Availability under combined facilities
Maximum borrowing capacity	$ 3,256
Amounts outstanding	445
Net availability	2,811
DTE Electric
Availability under combined facilities
Maximum borrowing capacity	800
Amounts outstanding	0
Net availability	800
DTE Gas
Availability under combined facilities
Maximum borrowing capacity	300
Amounts outstanding	0
Net availability	300
DTE Energy
Availability under combined facilities
Maximum borrowing capacity	2,156
Amounts outstanding	445
Net availability	1,711
Revolver borrowings
Availability under combined facilities
Amounts outstanding	80
Revolver borrowings | DTE Electric
Availability under combined facilities
Amounts outstanding	0
Revolver borrowings | DTE Gas
Availability under combined facilities
Amounts outstanding	0
Revolver borrowings | DTE Energy
Availability under combined facilities
Amounts outstanding	80
Commercial paper issuances
Availability under combined facilities
Amounts outstanding	50
Commercial paper issuances | DTE Electric
Availability under combined facilities
Amounts outstanding	0
Commercial paper issuances | DTE Gas
Availability under combined facilities
Amounts outstanding	0
Commercial paper issuances | DTE Energy
Availability under combined facilities
Amounts outstanding	50
Letters of credit
Availability under combined facilities
Amounts outstanding	315
Letters of credit | DTE Electric
Availability under combined facilities
Amounts outstanding	0
Letters of credit | DTE Gas
Availability under combined facilities
Amounts outstanding	0
Letters of credit | DTE Energy
Availability under combined facilities
Amounts outstanding	315
Unsecured revolving credit facility, expiring October 2027 | Revolver borrowings
Availability under combined facilities
Maximum borrowing capacity	2,600
Unsecured revolving credit facility, expiring October 2027 | Revolver borrowings | DTE Electric
Availability under combined facilities
Maximum borrowing capacity	800
Unsecured revolving credit facility, expiring October 2027 | Revolver borrowings | DTE Gas
Availability under combined facilities
Maximum borrowing capacity	300
Unsecured revolving credit facility, expiring October 2027 | Revolver borrowings | DTE Energy
Availability under combined facilities
Maximum borrowing capacity	1,500
Unsecured Canadian revolving credit facility, expiring May 2023 | Revolver borrowings
Availability under combined facilities
Maximum borrowing capacity	81
Unsecured Canadian revolving credit facility, expiring May 2023 | Revolver borrowings | DTE Electric
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured Canadian revolving credit facility, expiring May 2023 | Revolver borrowings | DTE Gas
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured Canadian revolving credit facility, expiring May 2023 | Revolver borrowings | DTE Energy
Availability under combined facilities
Maximum borrowing capacity	81
Unsecured letter of credit facility, expiring February 2025 | Letters of credit
Availability under combined facilities
Maximum borrowing capacity	150
Unsecured letter of credit facility, expiring February 2025 | Letters of credit | DTE Electric
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring February 2025 | Letters of credit | DTE Gas
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring February 2025 | Letters of credit | DTE Energy
Availability under combined facilities
Maximum borrowing capacity	150
Unsecured letter of credit facility, expiring June 2023 | Letters of credit
Availability under combined facilities
Maximum borrowing capacity	375
Unsecured letter of credit facility, expiring June 2023 | Letters of credit | DTE Electric
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring June 2023 | Letters of credit | DTE Gas
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring June 2023 | Letters of credit | DTE Energy
Availability under combined facilities
Maximum borrowing capacity	375
Unsecured letter of credit facility | Letters of credit
Availability under combined facilities
Maximum borrowing capacity	50
Unsecured letter of credit facility | Letters of credit | DTE Electric
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured letter of credit facility | Letters of credit | DTE Gas
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured letter of credit facility | Letters of credit | DTE Energy
Availability under combined facilities
Maximum borrowing capacity	$ 50