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Stock-Based Compensation - Stock Options Outstanding Roll Forward (Detail) - Equity Option [Member] - $ / shares
shares in Thousands
6 Months Ended
Jun. 30, 2018
Jul. 01, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding at December 31, 2017 2,039  
Granted 140 207
Exercised (305)  
Canceled (137)  
Outstanding at June 30, 2018 1,737  
Weighted-average exercise price of options outstanding at beginning of period $ 124.41  
Weighted-average exercise price of options granted 205.97 $ 149.74
Weighted-average exercise price of options exercised 101.09  
Weighted average exercise price of options canceled 126.04  
Weighted-average exercise price of options outstanding at end of period 134.95  
Minimum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted-average exercise price of options outstanding at beginning of period 38.09  
Weighted-average exercise price of options granted 192.62  
Weighted-average exercise price of options exercised 38.09  
Weighted average exercise price of options canceled 98.21  
Weighted-average exercise price of options outstanding at end of period 38.09  
Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted-average exercise price of options outstanding at beginning of period 194.26  
Weighted-average exercise price of options granted 208.47  
Weighted-average exercise price of options exercised 154.33  
Weighted average exercise price of options canceled 154.33  
Weighted-average exercise price of options outstanding at end of period $ 208.47