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Investments (Tables)
 9 Months Ended
Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract]  
Trading Securities [Table Text Block]
The following table summarizes the fair value of investments held as of September 30, 2015 and December 31, 2014 (in millions):
 
 
September 30, 2015
 
December 31, 2014
Debt securities
 
$
59

 
$
—

Equity securities
 
60

 
—

  Total
 
$
119

 
$
—
Realized Gain (Loss) on Investments [Table Text Block]
The following table presents gains and losses recognized in earnings for the Company (in millions):
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
 
2015
 
2014
 
2015
 
2014
Gains
 
$
1

 
$
—

 
$
1

 
$
—

Losses
 
(6
)
 
—

 
(8
)
 
—

  Net Loss
 
$
(5
)
 
$
—

 
$
(7
)
 
$
—