Jointly-Owned Utility Plant (Tables)

12 Months Ended

Dec. 31, 2015

Jointly Owned Utility Plant, Net Ownership Amount [Abstract]

Schedule of Jointly-Owned Utility Plants

Ownership information of the two utility plants as of December 31, 2015 was as follows:

	Belle River		Ludington Hydroelectric Pumped Storage
In service date	1984-1985		1973
Total plant capacity	1,270 MW		1,955 MW
Ownership interest	(a)		49%
Investment in Property, plant, and equipment (in millions)	$	1,779	$	443
Accumulated depreciation (in millions)	$	1,053	$	154

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(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.