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Share Based Compensation (Tables)
 12 Months Ended
Dec. 28, 2019
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Key assumptions in fair value determination The ranges of key assumptions used in determining the fair value of options granted during fiscal 2019, 2018, and 2017, as well as a summary of the methodology applied to develop each assumption, are as follows:
 Fiscal Year
 2019  2018  2017  
Expected price volatility26.4 - 27.6%26.4 - 27.0%25.1 - 26.0%
Risk-free interest rate1.6 - 2.5%2.5 - 3.0%1.7 - 1.9%
Weighted average expected term (in years)4.54.54.4
Forfeiture rate7.3 %7.3 %7.2 %
Dividend yield1.4 %1.6 %1.3 %
Summary of stock option activity A summary of stock option activity is as follows:
Stock Option ActivityOptions
Weighted
Average Exercise
Price
Weighted Average Fair Value
Weighted Average
Remaining
Contractual Term
Aggregate Intrinsic Value
(in thousands)
Outstanding at December 29, 20184,053,386  $72.49  7.0$46,472  
Granted395,701  89.78  $20.80  
Exercised(1,556,917) 71.52  
Canceled(74,651) 76.56  
Outstanding at December 28, 20192,817,519  $75.34  6.8$47,834  
Exercisable at December 28, 20191,629,075  $74.81  5.9$28,502  
Other information relative to option activity
Other information relative to options activity during fiscal 2019, 2018, and 2017 is as follows (in thousands):
Fiscal Year  
 201920182017  
Total fair value of stock options vested$16,060  $18,247  $15,996  
Total intrinsic value of stock options exercised$45,101  $43,476  $9,237  
Restricted stock units activity A summary of restricted stock unit activity is presented below:
Restricted Stock Unit ActivityRestricted Stock UnitsWeighted Average Grant Date Fair Value
Restricted at December 29, 2018438,070  $64.09  
Granted255,500  88.02  
Vested(116,118) 71.49  
Forfeited(34,046) 73.28  
Restricted at December 28, 2019543,406  $73.55  
Other information relative to restricted unit activity
Other information relative to performance-based restricted share unit activity during fiscal 2019 is as follows (in thousands):
Fiscal Year  
 201920182017
Total grant date fair value of performance-based restricted share units vested and issued$2,035  $—  $—  
Total intrinsic value of performance-based restricted share units vested and issued$2,666  $—  $—  
Performance-based Share Unit Activity A summary of performance-based restricted share unit activity is presented below:
Performance-Based Restricted Share Unit ActivityPerformance-Based Restricted Share UnitsWeighted Average Grant Date Fair Value
Restricted at December 29, 201841,310  $63.90  
Granted (a)
58,115  85.51  
Performance adjustment29,001  63.90  
Vested(28,792) 70.68  
Forfeited(6,173) 85.04  
Restricted at December 28, 201993,461  $75.97  
(a)Assumes 100% target level achievement of the relative performance targets. The actual number of shares that will be issued, which may be higher or lower than the target, will be determined by the level of achievement of the relative performance targets.
Other information performance-based restricted unit activity
Other information relative to restricted stock unit activity during fiscal 2019, 2018, and 2017 is as follows (in thousands):
Fiscal Year  
 201920182017
Total grant date fair value of restricted stock units vested and issued$8,301  $5,325  $3,301  
Total intrinsic value of restricted stock units vested and issued$10,623  $5,364  $3,465