Short-Term Credit Arrangements and Borrowings (Tables)

9 Months Ended

Sep. 30, 2014

Short-term Debt [Abstract]

Schedule of Line of Credit Facilities [Table Text Block]

The availability under the facilities in place at September 30, 2014 is shown in the following table:

	DTE Energy		DTE Electric		DTE Gas		Total
	(In millions)
Unsecured letter of credit facility, expiring in February 2015	$	100	$	—	$	—	$	100
Unsecured letter of credit facility, expiring in August 2015	125		—		—		125
Unsecured revolving credit facility, expiring April 2018	1,200		300		300		1,800
	1,425		300		300		2,025
Amounts outstanding at September 30, 2014:
Commercial paper issuances	207		254		192		653
Letters of credit	200		—		—		200
	407		254		192		853
Net availability at September 30, 2014	$	1,018	$	46	$	108	$	1,172