Short-Term Credit Arrangements and Borrowings (Details) - USD ($) $ in Millions	Jun. 30, 2022	May 31, 2022
Availability under combined facilities
Maximum borrowing capacity	$ 2,960
Amounts outstanding	1,087
Net availability	1,873
DTE Electric
Availability under combined facilities
Maximum borrowing capacity	500
Amounts outstanding	364
Net availability	136
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	2,160
Amounts outstanding	723
Net availability	1,437
Revolver borrowings
Availability under combined facilities
Amounts outstanding	85
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	85
Commercial paper issuances
Availability under combined facilities
Amounts outstanding	730
Commercial paper issuances | DTE Electric
Availability under combined facilities
Amounts outstanding	364
Commercial paper issuances | DTE Gas
Availability under combined facilities
Amounts outstanding	0
Commercial paper issuances | DTE Energy
Availability under combined facilities
Amounts outstanding	366
Letters of credit
Availability under combined facilities
Amounts outstanding	272
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	272
Unsecured revolving credit facility, expiring April 2026 | Revolver borrowings
Availability under combined facilities
Maximum borrowing capacity	2,300
Unsecured revolving credit facility, expiring April 2026 | Revolver borrowings | DTE Electric
Availability under combined facilities
Maximum borrowing capacity	500
Unsecured revolving credit facility, expiring April 2026 | Revolver borrowings | DTE Gas
Availability under combined facilities
Maximum borrowing capacity	300
Unsecured revolving credit facility, expiring April 2026 | 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	85
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	85
Unsecured letter of credit facility, expiring February 2023 | Letters of credit
Availability under combined facilities
Maximum borrowing capacity	150
Unsecured letter of credit facility, expiring February 2023 | Letters of credit | DTE Electric
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring February 2023 | Letters of credit | DTE Gas
Availability under combined facilities
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring February 2023 | 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	$ 70
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