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Commitments and Contingencies (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 29, 2014
Mar. 30, 2013
Information about Litigation Matters    
Number of vendors company purchased engines 1  
Construction Commitments    
Property and construction commitments $ 9.0  
Letters of Credit    
Letters of credit outstanding, amount 42.6 46.0
Letter of credit outstanding outside of the Senior credit facility $ 18.3