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Related Party Transactions (Tables)
 12 Months Ended
Dec. 31, 2014
Related Party Transactions [Abstract]  
Schedule of Related Party Transactions
The following is a summary of transactions with affiliated companies:
 
2014
 
2013
 
2012
Revenues
(In millions)
Energy sales
$
2

 
$
2

 
$
2

Other services
$
5

 
$
7

 
$
11

Shared capital assets
$
26

 
$
23

 
$
26

Costs
 
 
 
 
 
Fuel and purchased power
$
4

 
$
4

 
$
5

Other services and interest
$
(1
)
 
$
(1
)
 
$
1

Corporate expenses (net)
$
304

 
$
334

 
$
322

Other
 
 
 
 
 
Dividends declared
$
370

 
$
342

 
$
317

Dividends paid
$
370

 
$
342

 
$
317

Capital contribution from DTE Energy
$
190

 
$
400

 
$
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