Share-based Compensation Expense - Summary of Assumptions used to Estimate the Weighted-Average Fair Value Per Share for Stock Purchase under the Employee Stock Purchase Plan (Details) - Employee Stock [Member] |
9 Months Ended |
---|---|
Sep. 27, 2015
$ / shares
| |
Assumptions used to estimate the fair value per share of employee stock purchase rights granted | |
Risk-free interest rate, minimum | 0.07% |
Risk-free interest rate, maximum | 0.33% |
Expected volatility, minimum | 29.00% |
Expected volatility, maximum | 38.00% |
Expected dividends | 0.00% |
Weighted-average fair value per share (in dollars per share) | $ 53.92 |
Minimum [Member] | |
Assumptions used to estimate the fair value per share of employee stock purchase rights granted | |
Expected term | 6 months |
Maximum [Member] | |
Assumptions used to estimate the fair value per share of employee stock purchase rights granted | |
Expected term | 1 year |