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Share Plans (Tables)
9 Months Ended
Sep. 29, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Compensation Expense
Total share-based compensation expense for the Third Quarter and three-quarters ended September 29, 2019, and September 30, 2018, was as follows:
 
 
Third Quarter
 
Year-to-date
 
 
In millions
2019
 
2018
 
2019
2018
 
 
Total share-based compensation charges
$
0.6

 
$
1.2

 
$
4.0

$
3.1

 
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 2019 and the year-ended December 31, 2018,:
 
 
2019
 
2018
 
 
Dividend yield (%)
4.00
 
4.00
 
 
Expected volatility range (%)
22.65
 
22.65 - 35.77
 
 
Risk-free interest rate (%)
0.12
 
0.12 - 2.57
 
 
Expected life of share options range (years)
1.00 - 4.00
 
0.50 - 6.00
 
 
Weighted average exercise price ($)
$0.89
 
$0.65
 
 
Model used
Black-Scholes & Monte-Carlo
 
Black-Scholes & Monte-Carlo