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Cash And Cash Equivalents (Tables)
 3 Months Ended
Mar. 31, 2016
Cash And Cash Equivalents [Abstract]  
Summary Of Cash And Cash Equivalents



 

 

 

 

 



 

 

 

 

 



March 31,

 

December 31,



2016

 

2015



 

(in millions)



 

 

 

 

 

Cash

$

 57 

 

$

 15 

Marketable securities

 

 1,540 

 

 

– 

Total cash and cash equivalents

$

 1,597 

 

$

 15