Short-Term Credit Arrangements and Borrowings (Details) - USD ($) $ in Millions	Sep. 30, 2022	Jun. 30, 2022	May 31, 2022
Availability under combined facilities
Maximum borrowing capacity	$ 2,954
Amounts outstanding	1,332
Net availability	1,622
DTE Electric
Availability under combined facilities
Maximum borrowing capacity	500
Amounts outstanding	459
Net availability	41
DTE Gas
Availability under combined facilities
Maximum borrowing capacity	300
Amounts outstanding	130
Net availability	170
DTE Energy
Availability under combined facilities
Maximum borrowing capacity	2,154
Amounts outstanding	743
Net availability	1,411
Revolver borrowings
Availability under combined facilities
Amounts outstanding	79
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	79
Commercial paper issuances
Availability under combined facilities
Amounts outstanding	915
Commercial paper issuances | DTE Electric
Availability under combined facilities
Amounts outstanding	459
Commercial paper issuances | DTE Gas
Availability under combined facilities
Amounts outstanding	130
Commercial paper issuances | DTE Energy
Availability under combined facilities
Amounts outstanding	326
Letters of credit
Availability under combined facilities
Amounts outstanding	338
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	338
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	79
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	79
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	$ 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