Short-Term Credit Arrangements and Borrowings (Tables)

9 Months Ended

Sep. 30, 2013

Short-term Debt [Abstract]

Schedule of Line of Credit Facilities [Table Text Block]

The availability under the facilities in place at September 30, 2013 is shown in the following table:

	DTE Energy		DTE Electric		DTE Gas		Total
	(In millions)
Unsecured letter of credit facility, expiring in May 2014	$	50	$	—	$	—	$	50
Unsecured letter of credit facility, expiring in August 2015	125		—		—		125
Unsecured revolving credit facility, expiring April 2018	1,200		300		300		1,800
Total credit facilities at September 30, 2013	1,375		300		300		1,975
Amounts outstanding at September 30, 2013:
Commercial paper issuances	44		11		216		271
Letters of credit	235		—		—		235
	279		11		216		506
Net availability at September 30, 2013	$	1,096	$	289	$	84	$	1,469