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Jointly-Owned Utility Plant (Tables)
12 Months Ended
Dec. 31, 2019
Jointly Owned Utility Plant, Net Ownership Amount [Abstract]  
Schedule of Jointly-Owned Utility Plants
DTE Electric's ownership information of the two utility plants as of December 31, 2019 was as follows:
 
Belle River
 
Ludington
Hydroelectric
Pumped Storage
In-service date
1984-1985
 
1973
Total plant capacity
1,270 MW
 
2,220 MW
Ownership interest
81%
 
49%
Investment in Property, plant, and equipment (in millions)
$
1,903

 
$
616

Accumulated depreciation (in millions)
$
896

 
$
193