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Share Plans (Tables)
9 Months Ended
Sep. 26, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Share-based Compensation Expense
Total share-based compensation expense for the quarters ended September 26, 2021, and September 27, 2020, was as follows:
Third QuarterYear-to-date
In millions2021202020212020
Total share-based compensation charges$0.8 $0.8 $2.2 $2.1 
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The following table illustrates the assumptions used in deriving the fair value of share options granted during 2021 and the year-ended December 31, 2020:
20212020
Dividend yield (%)
3.39 - 4.09
3.39 - 4.09
Expected volatility range (%)
36.48 - 56.28
36.48 - 56.28
Risk-free interest rate (%)
0.18 - 0.49
0.18 - 0.49
Expected life of share options range (years)
0.50 - 4.00
0.50 - 4.00
Forfeiture rate5.00 5.00 
Weighted average exercise price ($)$1.00$1.00
Model usedBlack-Scholes & Monte-CarloBlack-Scholes & Monte-Carlo