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Restructuring - Summary of Restructuring Reserve (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 29, 2015
Restructuring Reserve [Roll Forward]  
Balance as of year-end $ 6.9us-gaap_RestructuringReserve
Reductions for cash payments related to all restructuring activities (4.2)us-gaap_PaymentsForRestructuring
Balance as of quarter-end $ 2.7us-gaap_RestructuringReserve