Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Schedule of Investments in Affiliates

The company owns interests in the following affiliates:

Name of company	Country of incorporation	Holding	Proportion of voting rights and shares held	Classification	Consolidation method
Luxfer Uttam India Private Limited	India	Ordinary shares	51%	Joint venture (VIE)	Equity method
Nikkei-MEL Co. Limited	Japan	Ordinary shares	50%	Joint venture	Equity method
Sub161 Pty Limited	Australia	Ordinary shares	26.4%	Associate (VIE)	Equity method

Schedule of Property, Plant and Equipment Useful Life

The estimated useful lives is summarized as follows:

Freehold buildings	10 - 33 years
Leasehold land and buildings	The lesser of life of lease or freehold rate
Machinery and equipment	3 - 25 years
Including:
Heavy production equipment (including casting, rolling, extrusion and press equipment)	20 - 25 years
Chemical production plant and robotics	7 - 10 years
Other production machinery	5 - 10 years
Furniture, fittings, storage and equipment	3 - 10 years
Computer software	4 - 7 years