Short-Term Credit Arrangements and Borrowings (Details) - USD ($)	Sep. 30, 2023	Jul. 31, 2023	Jun. 30, 2023
Availability under combined facilities
Maximum borrowing capacity	$ 3,175,000,000
Amounts outstanding	1,384,000,000
Net availability	1,791,000,000
DTE Electric
Availability under combined facilities
Maximum borrowing capacity	900,000,000
Amounts outstanding	679,000,000
Net availability	221,000,000
DTE Gas
Availability under combined facilities
Maximum borrowing capacity	300,000,000
Amounts outstanding	190,000,000
Net availability	110,000,000
DTE Energy
Availability under combined facilities
Maximum borrowing capacity	1,975,000,000
Amounts outstanding	515,000,000
Net availability	1,460,000,000
Commercial paper issuances
Availability under combined facilities
Amounts outstanding	1,217,000,000
Commercial paper issuances | DTE Electric
Availability under combined facilities
Amounts outstanding	656,000,000
Commercial paper issuances | DTE Gas
Availability under combined facilities
Amounts outstanding	190,000,000
Commercial paper issuances | DTE Energy
Availability under combined facilities
Amounts outstanding	371,000,000
Letters of credit
Availability under combined facilities
Amounts outstanding	167,000,000
Letters of credit | DTE Electric
Availability under combined facilities
Amounts outstanding	23,000,000
Letters of credit | DTE Gas
Availability under combined facilities
Amounts outstanding	0
Letters of credit | DTE Energy
Availability under combined facilities
Amounts outstanding	144,000,000
Unsecured revolving credit facility, expiring October 2028 | Revolver borrowings
Availability under combined facilities
Maximum borrowing capacity	2,600,000,000
Unsecured revolving credit facility, expiring October 2028 | Revolver borrowings | DTE Electric
Availability under combined facilities
Maximum borrowing capacity	800,000,000
Unsecured revolving credit facility, expiring October 2028 | Revolver borrowings | DTE Gas
Availability under combined facilities
Maximum borrowing capacity	300,000,000
Unsecured revolving credit facility, expiring October 2028 | Revolver borrowings | DTE Energy
Availability under combined facilities
Maximum borrowing capacity	1,500,000,000
Unsecured letter of credit facility, expiring June 2024 | Letters of credit
Availability under combined facilities
Maximum borrowing capacity	175,000,000
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	175,000,000
Unsecured letter of credit facility, expiring February 2025 | Letters of credit
Availability under combined facilities
Maximum borrowing capacity	150,000,000
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	150,000,000
Unsecured letter of credit facility | Letters of credit
Availability under combined facilities
Maximum borrowing capacity	100,000,000
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	100,000,000
Unsecured letter of credit facility | Letters of credit
Availability under combined facilities
Maximum borrowing capacity	100,000,000		$ 100,000,000
Unsecured letter of credit facility | Letters of credit | DTE Electric
Availability under combined facilities
Maximum borrowing capacity	100,000,000
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
Unsecured letter of credit facility | Letters of credit
Availability under combined facilities
Maximum borrowing capacity	50,000,000
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	$ 50,000,000	$ 50,000,000