Short-Term Credit Arrangements and Borrowings (Details) $ in Millions	Jun. 30, 2023 USD ($)
Availability under combined facilities
Maximum borrowing capacity	$ 3,225
Amounts outstanding	817
Net availability	2,408
DTE Electric
Availability under combined facilities
Maximum borrowing capacity	900
Amounts outstanding	222
Net availability	678
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	2,025
Amounts outstanding	595
Net availability	1,430
Commercial paper issuances
Availability under combined facilities
Amounts outstanding	528
Commercial paper issuances | DTE Electric
Availability under combined facilities
Amounts outstanding	222
Commercial paper issuances | DTE Gas
Availability under combined facilities
Amounts outstanding	0
Commercial paper issuances | DTE Energy
Availability under combined facilities
Amounts outstanding	306
Letters of credit
Availability under combined facilities
Amounts outstanding	289
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	289
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 letter of credit facility, expiring June 2024 | Letters of credit
Availability under combined facilities
Maximum borrowing capacity	275
Unsecured letter of credit facility, expiring June 2024 | Letters of credit | DTE Electric
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring June 2024 | Letters of credit | DTE Gas
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring June 2024 | Letters of credit | DTE Energy
Availability under combined facilities
Maximum borrowing capacity	275
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 | Letters of credit
Availability under combined facilities
Maximum borrowing capacity	100
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	100
Unsecured letter of credit facility | Letters of credit
Availability under combined facilities
Maximum borrowing capacity	100
Unsecured letter of credit facility | Letters of credit | DTE Electric
Availability under combined facilities
Maximum borrowing capacity	100
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	$ 0