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v3.21.1

Share Plans - Additional Information (Details) | 3 Months Ended
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Mar. 28, 2021 $ / shares shares
Share-based Payment Arrangement [Abstract] |
Granted during the year (in shares) | 110,000
Granted during the year (in USD per share) | $ / shares | $ 21.14
Granted during the year, based on total shareholder return (in shares) | 45,000

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- Definition Class Of Warrants Or Rights Issued During The Period + References No definition available. + Details
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Namespace Prefix: | lxfr_
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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X
- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. + References No definition available. + Details
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