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Accounting policies - Pensions (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Accounting Policies [Abstract]
Net defined benefit liability (asset)	$ 55.3	$ 66.5	$ 58.9

X

- Definition

The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2017-01-01
-Paragraph 140
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_140_a&doctype=Standard
-URIDate 2017-03-09

+ Details

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Period Type:	instant

X

- Definition

Disclosure Of Accounting Policies [Abstract]

+ References

No definition available.

+ Details

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Namespace Prefix:	lxfr_
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