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Investments (Notes)
12 Months Ended
Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]  
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]
Investments
 
BNSF holds investments which are classified as trading securities and included in Other Assets on the balance sheet. The following table summarizes the fair value of investments held as of December 31, 2015 and December 31, 2014 (in millions):
 
 
December 31, 2015
 
December 31, 2014
Debt securities
 
$
57

 
$

Equity securities
 
63

 

  Total
 
$
120

 
$



As of the year-ended December 31, 2014, all investments were primarily held in cash and cash equivalents.
    
The fair value measurements of BNSF’s debt securities are based on Level 2 inputs and equity securities are based on Level 1 inputs, using a market approach. The following table presents gains and losses recognized in earnings for the Company (in millions):

 
 
December 31, 2015
 
December 31, 2014
Gains
 
$
6

 
$

Losses
 
(11
)
 

Net Loss
 
$
(5
)
 
$