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Stock-Based Compensation - Number and Weighted Average Exercise Price of Options Issued and Outstanding under all Stock Option Plans (Detail)
shares in Thousands
 6 Months Ended
Jul. 01, 2017
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Options outstanding, beginning of period 8,521
Granted 281
Canceled (109)
Exercised (1,745)
Options outstanding, end of period 6,948
Options exercisable, end of period 4,082
Options available for grant, end of period 4,600
Average Exercise Price  
Options outstanding, beginning of period | $ / shares $ 28.56
Granted | $ / shares 88.64
Canceled | $ / shares 32.03
Exercised | $ / shares 27.58
Options outstanding, end of period | $ / shares 31.19
Options exercisable, end of period | $ / shares $ 26.42