Short-Term Credit Arrangements and Borrowings (Details) $ in Millions	Mar. 31, 2025 USD ($)
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	$ 3,200
Amounts outstanding	807
Net availability	2,393
DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	925
Amounts outstanding	634
Net availability	291
DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	300
Amounts outstanding	0
Net availability	300
DTE Energy
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	1,975
Amounts outstanding	173
Net availability	1,802
Letters of credit
Line Of Credit Facility [Line Items]
Amounts outstanding	294
Letters of credit | DTE Electric
Line Of Credit Facility [Line Items]
Amounts outstanding	121
Letters of credit | DTE Gas
Line Of Credit Facility [Line Items]
Amounts outstanding	0
Letters of credit | DTE Energy
Line Of Credit Facility [Line Items]
Amounts outstanding	173
Commercial paper issuances
Line Of Credit Facility [Line Items]
Amounts outstanding	513
Commercial paper issuances | DTE Electric
Line Of Credit Facility [Line Items]
Amounts outstanding	513
Commercial paper issuances | DTE Gas
Line Of Credit Facility [Line Items]
Amounts outstanding	0
Commercial paper issuances | DTE Energy
Line Of Credit Facility [Line Items]
Amounts outstanding	0
Unsecured revolving credit facility, expiring October 2029 | Revolver borrowings
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	2,600
Unsecured revolving credit facility, expiring October 2029 | Revolver borrowings | DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	800
Unsecured revolving credit facility, expiring October 2029 | Revolver borrowings | DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	300
Unsecured revolving credit facility, expiring October 2029 | Revolver borrowings | DTE Energy
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	1,500
Unsecured letter of credit facility, expiring in June 2025 | Letters of credit
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	175
Unsecured letter of credit facility, expiring in June 2025 | Letters of credit | DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring in June 2025 | Letters of credit | DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring in June 2025 | Letters of credit | DTE Energy
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	175
Unsecured letter of credit facility, expiring February 2027 | Letters of credit
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	150
Unsecured letter of credit facility, expiring February 2027 | Letters of credit | DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring February 2027 | Letters of credit | DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring February 2027 | Letters of credit | DTE Energy
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	150
Unsecured letter of credit facility, expiring June 2026 | Letters of credit
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	100
Unsecured letter of credit facility, expiring June 2026 | Letters of credit | DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring June 2026 | Letters of credit | DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring June 2026 | Letters of credit | DTE Energy
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	100
Unsecured letter of credit facility | Letters of credit
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	50
Unsecured letter of credit facility | Letters of credit | DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Unsecured letter of credit facility | Letters of credit | DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Unsecured letter of credit facility | Letters of credit | DTE Energy
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	50
Unsecured letter of credit facility | Letters of credit
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	125
Unsecured letter of credit facility | Letters of credit | DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	125
Unsecured letter of credit facility | Letters of credit | DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Unsecured letter of credit facility | Letters of credit | DTE Energy
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	$ 0