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Marketable Securities, at Fair Value
9 Months Ended
Sep. 30, 2013
Investments, Debt and Equity Securities [Abstract]  
Marketable Securities, at Fair Value
Marketable Securities, at Fair Value
The Company’s nonqualified trusts hold available-for-sale securities for funding requirements.
The amortized cost, gross unrealized gain, gross unrealized loss and fair values for available-for-sale securities by major security type are as follows:
 
As of
September 30,
2013
 
As of
December 31,
2012
 
(In $ millions)
Mutual Funds
 
 
 
Amortized cost
44

 
53

Gross unrealized gain

 

Gross unrealized loss

 

Fair value
44

 
53


See Note 16, Fair Value Measurements, for additional information regarding the fair value of the Company's marketable securities.