Long-Term Debt (Details)	6 Months Ended
	Jun. 30, 2016 USD ($)
Debt Instrument [Line Items]
Debt redemption amount	$ 313,000,000
Debt Instrument, Face Amount	$ 600,000,000
Mortgages | DTE Electric | May Mortgage Bonds 3.70%
Debt Instrument [Line Items]
Interest Rate	3.70%
Debt Instrument, Face Amount	$ 300,000,000
Mortgages | DTE Electric | March 2016 Mortgage Bonds 7.904%
Debt Instrument [Line Items]
Interest Rate	7.904%
Debt redemption amount	$ 10,000,000
Junior Subordinated Debentures | May Junior Subordinated Debentures 5.375%
Debt Instrument [Line Items]
Interest Rate	5.375%
Debt Instrument, Face Amount	$ 300,000,000
Senior Notes | June Senior Notes 6.35% due 2016
Debt Instrument [Line Items]
Interest Rate	6.35%
Debt redemption amount	$ 300,000,000
Other Long-Term Debt | DTE Energy
Debt Instrument [Line Items]
Debt redemption amount	$ 3,000,000