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Share-based Compensation Expense - Narrative (Details)
$ in Millions
9 Months Ended
Oct. 02, 2016
USD ($)
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Unrecognized compensation cost related to stock options, restricted stock, and ESPP shares granted to date $ 203.2
Weighted-average period of unrecognized compensation cost related to stock options, restricted stock, and ESPP shares granted to date 2 years 5 months