Short-Term Credit Arrangements and Borrowings (Details)	Dec. 31, 2016 USD ($)
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 2,070,000,000
Amounts outstanding	653,000,000
Net availability	1,417,000,000
DTE Energy
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	1,370,000,000
Amounts outstanding	411,000,000
Net availability	959,000,000
DTE Electric
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	400,000,000
Amounts outstanding	62,000,000
Net availability	338,000,000
DTE Gas
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	300,000,000
Amounts outstanding	180,000,000
Net availability	120,000,000
Letters of credit
Line Of Credit Facility [Line Items]
Amounts outstanding	154,000,000
Letters of credit | DTE Energy
Line Of Credit Facility [Line Items]
Amounts outstanding	154,000,000
Letters of credit | DTE Electric
Line Of Credit Facility [Line Items]
Amounts outstanding	0
Letters of credit | DTE Gas
Line Of Credit Facility [Line Items]
Amounts outstanding	0
Letters of credit | Unsecured letter of credit facility, expiring in February 2017
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	100,000,000
Letters of credit | Unsecured letter of credit facility, expiring in February 2017 | DTE Energy
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	100,000,000
Letters of credit | Unsecured letter of credit facility, expiring in February 2017 | DTE Electric
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	0
Letters of credit | Unsecured letter of credit facility, expiring in February 2017 | DTE Gas
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	0
Letters of credit | Unsecured letter of credit facility, expiring in September 2017
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	70,000,000
Letters of credit | Unsecured letter of credit facility, expiring in September 2017 | DTE Energy
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	70,000,000
Letters of credit | Unsecured letter of credit facility, expiring in September 2017 | DTE Electric
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	0
Letters of credit | Unsecured letter of credit facility, expiring in September 2017 | DTE Gas
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	0
Revolving credit facility | Unsecured revolving credit facility, expiring April 2021
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	1,900,000,000
Revolving credit facility | Unsecured revolving credit facility, expiring April 2021 | DTE Energy
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	1,200,000,000
Revolving credit facility | Unsecured revolving credit facility, expiring April 2021 | DTE Electric
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	400,000,000
Revolving credit facility | Unsecured revolving credit facility, expiring April 2021 | DTE Gas
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	300,000,000
Commercial paper issuances
Line Of Credit Facility [Line Items]
Amounts outstanding	499,000,000
Commercial paper issuances | DTE Energy
Line Of Credit Facility [Line Items]
Amounts outstanding	257,000,000
Commercial paper issuances | DTE Electric
Line Of Credit Facility [Line Items]
Amounts outstanding	62,000,000
Commercial paper issuances | DTE Gas
Line Of Credit Facility [Line Items]
Amounts outstanding	$ 180,000,000