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Debt - Bank Credit Lines (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 28, 2014
Line of Credit Facility [Line Items]  
Weighted average interest rate on borrowings under credit lines at period end (in hundredths) 1.50%
Revolving credit facility [Member]
 
Line of Credit Facility [Line Items]  
Revolving credit facility borrowing capacity $ 500
Additional credit available under expansion feature of revolving credit facility 200
Revolving credit facility expiration date Sep. 12, 2017
Outstanding letters of credit provided to third parties 10.1
Line of credit facility, amount outstanding 60.0
Various other short-term bank credit lines [Member]
 
Line of Credit Facility [Line Items]  
Line of credit facility, amount outstanding $ 23.7