Short-Term Credit Arrangements and Borrowings (Availability Under Credit Facilities) (Details) $ in Millions	Dec. 31, 2025 USD ($)
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	$ 3,850
Amounts outstanding at December 31, 2025	1,629
Net availability at December 31, 2025	2,221
DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	1,475
Amounts outstanding at December 31, 2025	983
Net availability at December 31, 2025	492
DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	300
Amounts outstanding at December 31, 2025	80
Net availability at December 31, 2025	220
DTE Energy
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	2,075
Amounts outstanding at December 31, 2025	566
Net availability at December 31, 2025	1,509
Revolving credit facility | Unsecured revolving credit facility, expiring October 2030
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	2,800
Revolving credit facility | Unsecured revolving credit facility, expiring October 2030 | DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	1,000
Revolving credit facility | Unsecured revolving credit facility, expiring October 2030 | DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	300
Revolving credit facility | Unsecured revolving credit facility, expiring October 2030 | DTE Energy
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	1,500
Letters of credit
Line Of Credit Facility [Line Items]
Amounts outstanding at December 31, 2025	747
Letters of credit | DTE Electric
Line Of Credit Facility [Line Items]
Amounts outstanding at December 31, 2025	331
Letters of credit | DTE Gas
Line Of Credit Facility [Line Items]
Amounts outstanding at December 31, 2025	0
Letters of credit | DTE Energy
Line Of Credit Facility [Line Items]
Amounts outstanding at December 31, 2025	416
Letters of credit | Unsecured letter of credit facility, expiring June 2026
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	150
Letters of credit | Unsecured letter of credit facility, expiring June 2026 | DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Letters of credit | Unsecured letter of credit facility, expiring June 2026 | DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Letters of credit | Unsecured letter of credit facility, expiring June 2026 | DTE Energy
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	150
Letters of credit | Unsecured letter of credit facility, expiring February 2027
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	200
Letters of credit | Unsecured letter of credit facility, expiring February 2027 | DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Letters of credit | Unsecured letter of credit facility, expiring February 2027 | DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Letters of credit | Unsecured letter of credit facility, expiring February 2027 | DTE Energy
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	200
Letters of credit | Unsecured letter of credit facilities, expiring June 2028
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	150
Letters of credit | Unsecured letter of credit facilities, expiring June 2028 | DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Letters of credit | Unsecured letter of credit facilities, expiring June 2028 | DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Letters of credit | Unsecured letter of credit facilities, expiring June 2028 | DTE Energy
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	150
Letters of credit | Unsecured letter of credit facility
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	75
Letters of credit | Unsecured letter of credit facility | DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Letters of credit | Unsecured letter of credit facility | DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Letters of credit | Unsecured letter of credit facility | DTE Energy
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	75
Letters of credit | Unsecured letter of credit facilities, expiring December 2026
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	150
Letters of credit | Unsecured letter of credit facilities, expiring December 2026 | DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	150
Letters of credit | Unsecured letter of credit facilities, expiring December 2026 | DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Letters of credit | Unsecured letter of credit facilities, expiring December 2026 | DTE Energy
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Letters of credit | Unsecured letter of credit facility
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	175
Letters of credit | Unsecured letter of credit facility | DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	175
Letters of credit | Unsecured letter of credit facility | DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Letters of credit | Unsecured letter of credit facility | DTE Energy
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Letters of credit | Unsecured letter of credit facility
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	150
Letters of credit | Unsecured letter of credit facility | DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	150
Letters of credit | Unsecured letter of credit facility | DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Letters of credit | Unsecured letter of credit facility | DTE Energy
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Commercial paper issuances
Line Of Credit Facility [Line Items]
Amounts outstanding at December 31, 2025	882
Commercial paper issuances | DTE Electric
Line Of Credit Facility [Line Items]
Amounts outstanding at December 31, 2025	652
Commercial paper issuances | DTE Gas
Line Of Credit Facility [Line Items]
Amounts outstanding at December 31, 2025	80
Commercial paper issuances | DTE Energy
Line Of Credit Facility [Line Items]
Amounts outstanding at December 31, 2025	$ 150