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Jointly Owned Utility Plant (Tables)
12 Months Ended
Dec. 31, 2013
Jointly Owned Utility Plant, Net Ownership Amount [Abstract]  
Schedule of Jointly Owned Utility Plants [Table Text Block]
Ownership information of the two utility plants as of December 31, 2013 was as follows:
 
Belle River
 
Ludington
Hydroelectric
Pumped Storage
In-service date
1984-1985

 
1973

Total plant capacity
1,270
 MW
 
1,872
 MW
Ownership interest
(a)

 
49
%
Investment in property, plant and equipment (in millions)
$
1,702

 
$
354

Accumulated depreciation (in millions)
$
969

 
$
170


_______________________________________
(a)
DTE Electric's ownership interest is 63% in Unit No. 1, 81% of the facilities applicable to Belle River used jointly by the Belle River and St. Clair Power Plants and 75% in common facilities used at Unit No. 2.