Short-Term Credit Arrangements and Borrowings (Details) $ in Millions	Sep. 30, 2024 USD ($)
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	$ 3,200
Amounts outstanding	1,141
Net availability	2,059
DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	925
Amounts outstanding	890
Net availability	35
DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	300
Amounts outstanding	140
Net availability	160
DTE Energy
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	1,975
Amounts outstanding	111
Net availability	1,864
Letters of credit
Line Of Credit Facility [Line Items]
Amounts outstanding	175
Letters of credit | DTE Electric
Line Of Credit Facility [Line Items]
Amounts outstanding	92
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	83
Commercial paper issuances
Line Of Credit Facility [Line Items]
Amounts outstanding	966
Commercial paper issuances | DTE Electric
Line Of Credit Facility [Line Items]
Amounts outstanding	798
Commercial paper issuances | DTE Gas
Line Of Credit Facility [Line Items]
Amounts outstanding	140
Commercial paper issuances | DTE Energy
Line Of Credit Facility [Line Items]
Amounts outstanding	28
Unsecured revolving credit facility, expiring October 2028 | Revolver borrowings
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	2,600
Unsecured revolving credit facility, expiring October 2028 | Revolver borrowings | DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	800
Unsecured revolving credit facility, expiring October 2028 | Revolver borrowings | DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	300
Unsecured revolving credit facility, expiring October 2028 | 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 2025 | Letters of credit
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	150
Unsecured letter of credit facility, expiring February 2025 | Letters of credit | DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring February 2025 | Letters of credit | DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Unsecured letter of credit facility, expiring February 2025 | 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 facilities | Letters of credit
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	50
Unsecured letter of credit facilities | Letters of credit | DTE Electric
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Unsecured letter of credit facilities | Letters of credit | DTE Gas
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	0
Unsecured letter of credit facilities | 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