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Financial Instruments (Tables)
3 Months Ended
Mar. 27, 2015
Investments, All Other Investments [Abstract]  
Carrying Amounts and Estimated Fair Values of Company's Long-Term Debt and Foreign Currency Forward Contracts

The carrying amounts and estimated fair values of the Company’s other financial instruments are presented in the table below.

 

     March 27, 2015     December 31, 2014  
     Carrying
Amount
    Estimated
Fair Value
    Carrying
Amount
    Estimated
Fair Value
 
     (in millions)  

Senior Notes(1)

   $ 3,939      $ 4,203      $ 3,939      $ 4,178   

Foreign currency forward contracts(2)

   $ (14   $ (14   $ (6   $ (6

 

(1) 

The Company measures the fair value of its Senior Notes using Level 2 inputs based primarily on current market yields for its existing debt traded in the secondary market.

 

(2) 

The Company measures the fair values of foreign currency forward contracts based on forward exchange rates. See Note 16 for additional disclosures regarding the notional amounts and fair values of foreign currency forward contracts.