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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Long-term Purchase Commitments
The Registrants estimate the following commitments from 2017 through 2051 for DTE Energy, and 2017 through 2033 for DTE Electric, as detailed in the following table:
 
DTE Energy
 
DTE Electric
 
(In millions)
2017
$
2,394

 
$
515

2018
1,226

 
520

2019
570

 
165

2020
412

 
104

2021
373

 
104

2022 and thereafter
2,745

 
904

 
$
7,720

 
$
2,312