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Subsequent Events	12 Months Ended
	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events The Company entered into negotiations with a third party during the fourth quarter of 2018, with a view to selling its Magnesium Elektron CZ s.r.o. subsidiary, which is involved in magnesium recycling and based in the Czech Republic. An offer was received and subsequently accepted in February 2019 which has resulted in the business being classified as held-for-sale and written down to fair value, with an impairment charge of $3.4 million recognized in the 2018 statement of consolidated income. On December 18, 2018, Luxfer Holdings PLC  announced the signing of an agreement under which Luxfer would acquire Neo Performance Materials ("Neo,").  We subsequently announced on March 10, 2019 that we had executed a termination agreement, under which we will make a payment to Neo of up to $3.5 million to cover their costs in respect of the aborted acquisition.

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- Definition

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

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