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Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2013
Assets and Liabilities Measured at Fair Value on Recurring Basis and Subject to Fair Value Disclosure Requirements

The Company’s assets measured at fair value on a recurring basis and subject to fair value disclosure requirements at June 30, 2013 and December 31, 2012 were as follows:

 

            Fair Value Measurements at Reporting Date Using  
In millions    Total      Quoted Prices in
Active Markets
for Identical
Assets

(Level 1)
     Significant
Other
Observable
Inputs
(Level 2)
     Significant
Unobservable
Inputs

(Level 3)
 

Assets

           

Money market funds, June 30, 2013

   $ 434       $ 434       $ 0       $ 0   

Money market funds, December 31, 2012

   $ 260       $ 260       $ 0       $ 0