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Share Plans | 9 Months Ended
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Sep. 27, 2020
Share-based Payment Arrangement [Abstract] |
Share Plans | Share Plans Total share-based compensation expense for the three-quarters ended September 27, 2020, and September 29, 2019, was as follows:
|  | Third Quarter |  |  |  | Year-to-date |  |  |
| In millions | 2020 |  | 2019 |  | 2020 |  | 2019 |
| Total share-based compensation charges | $ | 0.8 |  |  | $ | 0.6 |  |  | $ | 2.1 |  |  | $ | 4.0 |  |
In March 2020, we issued our annual share-based compensation grants under the Luxfer Holdings PLC Long-Term Umbrella Incentive Plan. The total number of awards issued was approximately 130,000 and the weighted average fair value of options granted in 2020 was estimated to be $11.30 per share. In May 2020, we issued additional share-based compensation grants under the Luxfer Holdings PLC Long-Term Umbrella Incentive Plan. The total number of awards issued was 2,000 and the weighted average fair value of options granted in 2020 was estimated to be $13.13 per share. In June 2020, we issued our annual share-based compensation grants under the Luxfer Holdings PLC Non-Executive Directors' Equity Incentive Plan. The total number of awards issued was 27,280 and the weighted-average fair value of options granted was estimated to be $13.38 per share. In September 2020, we issued additional share-based compensation grants under the Luxfer Holdings PLC Long-Term Umbrella Incentive Plan. The total number of awards issued was approximately 4,000 and the weighted average fair value of options granted was estimated to be $11.84 per share. The following table illustrates the assumptions used in deriving the fair value of share options granted during 2020 and the year-ended December 31, 2019:
|  | 2020 |  | 2019 |
| Dividend yield (%) | 3.39 - 4.09 |  | 2.10 |
| Expected volatility range (%) | 36.48 - 56.28 |  | 35.06 - 44.20 |
| Risk-free interest rate (%) | 0.16 - 0.49 |  | 0.74 - 2.52 |
| Expected life of share options range (years) | 0.50 - 4.00 |  | 0.50 - 4.00 |
| Weighted average exercise price ($) | $1.00 |  | $1.00 |
| Model used | Black-Scholes & Monte-Carlo |  | Black-Scholes & Monte-Carlo |
The expected life of the share options is based on historical data and current expectations, and is not necessarily indicative of exercise patterns that may occur. The expected volatility reflects the assumption that the historical volatility over a period similar to the life of the options is indicative of future trends, which may not necessarily be the actual outcome.

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- Definition The entire disclosure for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 + Details
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