Short-Term Credit Arrangements and Borrowings (Tables)

12 Months Ended

Dec. 31, 2013

Short-term Debt [Abstract]

Schedule of Line of Credit Facilities [Table Text Block]

The availability under the facilities in place at December 31, 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
	1,375		300		300		1,975
Amounts outstanding at December 31, 2013:
Commercial paper issuances	35		—		96		131
Letters of credit	244		—		—		244
	279		—		96		375
Net availability at December 31, 2013	$	1,096	$	300	$	204	$	1,600