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Share Plans (Tables)
9 Months Ended
Sep. 27, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of Share-based Compensation Expense
Total share-based compensation expense for the three-quarters ended September 27, 2020, and September 29, 2019, was as follows:
Third QuarterYear-to-date
In millions2020201920202019
Total share-based compensation charges$0.8 $0.6 $2.1 $4.0 
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The following table illustrates the assumptions used in deriving the fair value of share options granted during 2020 and the year-ended December 31, 2019:
20202019
Dividend yield (%)
3.39 - 4.09
2.10
Expected volatility range (%)
36.48 - 56.28
35.06 - 44.20
Risk-free interest rate (%)
0.16 - 0.49
0.74 - 2.52
Expected life of share options range (years)
0.50 - 4.00
0.50 - 4.00
Weighted average exercise price ($)
$1.00
$1.00
Model usedBlack-Scholes & Monte-CarloBlack-Scholes & Monte-Carlo