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Share Plans (Tables)
3 Months Ended
Mar. 29, 2020
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Compensation Expense

Total share-based compensation expense for the quarters ended March 29, 2020, and March 31, 2019, was as follows:
 
 
First Quarter
 
 
In millions
2020
 
2019
 
 
 
Total share-based compensation charges
$
0.5

 
$
2.6

 
 

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The following table illustrates the assumptions used in deriving the fair value of share options granted during the First Quarter of 2020 and the year-ended December 31, 2019:
 
 
2020
 
2019
 
 
Dividend yield (%)
2.10
 
2.10
 
 
Expected volatility range (%)
39.00
 
35.06 - 44.20
 
 
Risk-free interest rate (%)
1.60
 
0.74 - 2.52
 
 
Expected life of share options range (years)
4.00
 
0.50 - 4.00
 
 
Weighted average exercise price ($)
$1.00
 
$1.00
 
 
Model used
Black-Scholes
 
Black-Scholes & Monte-Carlo