Preferred and Preferenced Securities (Details) (USD $)	Dec. 31, 2014
DTE Energy [Member]
Preferred and Preferenced Securities [Line Items]
Preferred stock, par value (in dollars per share)	$ 0
Preferred stock, shares authorized (in shares)	5,000,000
DTE Electric [Member]
Preferred and Preferenced Securities [Line Items]
Preferred stock, par value (in dollars per share)	$ 100
Preferred stock, shares authorized (in shares)	6,747,484
Preference stock, par value (in dollars per share)	$ 1
Preference stock shares authorized (in shares)	30,000,000
DTE Gas [Member]
Preferred and Preferenced Securities [Line Items]
Preferred stock, par value (in dollars per share)	$ 1
Preferred stock, shares authorized (in shares)	7,000,000
Preference stock, par value (in dollars per share)	$ 1
Preference stock shares authorized (in shares)	4,000,000