Short-Term Credit Arrangements and Borrowings (Availability Under Credit Facilities) (Details) $ in Millions	Jun. 30, 2025 USD ($)
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	$ 3,200
Amounts outstanding at June 30, 2025	899
Net availability at June 30, 2025	2,301
DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	950
Amounts outstanding at June 30, 2025	734
Net availability at June 30, 2025	216
DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	300
Amounts outstanding at June 30, 2025	0
Net availability at June 30, 2025	300
DTE Energy
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	1,950
Amounts outstanding at June 30, 2025	165
Net availability at June 30, 2025	1,785
Letters of credit
Line Of Credit Facility [Line Items]
Amounts outstanding at June 30, 2025	302
Letters of credit \| DTE Electric
Line Of Credit Facility [Line Items]
Amounts outstanding at June 30, 2025	137
Letters of credit \| DTE Gas
Line Of Credit Facility [Line Items]
Amounts outstanding at June 30, 2025	0
Letters of credit \| DTE Energy
Line Of Credit Facility [Line Items]
Amounts outstanding at June 30, 2025	165
Commercial paper issuances
Line Of Credit Facility [Line Items]
Amounts outstanding at June 30, 2025	597
Commercial paper issuances \| DTE Electric
Line Of Credit Facility [Line Items]
Amounts outstanding at June 30, 2025	597
Commercial paper issuances \| DTE Gas
Line Of Credit Facility [Line Items]
Amounts outstanding at June 30, 2025	0
Commercial paper issuances \| DTE Energy
Line Of Credit Facility [Line Items]
Amounts outstanding at June 30, 2025	0
Unsecured revolving credit facility, expiring October 2029 \| Revolving credit facility
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	2,600
Unsecured revolving credit facility, expiring October 2029 \| Revolving credit facility \| DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	800
Unsecured revolving credit facility, expiring October 2029 \| Revolving credit facility \| DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	300
Unsecured revolving credit facility, expiring October 2029 \| Revolving credit facility \| DTE Energy
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	1,500
Unsecured letter of credit facility, expiring June 2026 \| Letters of credit
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	150
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	150
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 2027 \| Letters of credit
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	100
Unsecured letter of credit facility, expiring June 2027 \| Letters of credit \| DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring June 2027 \| Letters of credit \| DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring June 2027 \| 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	150
Unsecured letter of credit facility \| Letters of credit \| DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	150
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