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Financial Instruments and Derivative Instruments (Details 4) (USD $)
In Millions, unless otherwise specified
Jun. 29, 2014
Dec. 31, 2013
Long-term debt    
Gross carrying amount $ 306.6 $ 307.7
Estimated fair value $ 330.8 $ 333.4
5.85% Senior notes due 2016
   
Senior notes    
Interest rate (as a percent) 5.85%  
5.05% Senior notes due 2020
   
Senior notes    
Interest rate (as a percent) 5.05%