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Supplementary balance sheet information | 12 Months Ended
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Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Supplementary balance sheet information | Supplementary balance sheet information
| In millions |  | 2018 |  | 2017 |
| Accounts and other receivables |  |  |  |  |
| Trade receivables |  | $ | 49.8 |  |  | $ | 53.8 |  |
| Related parties |  | 0.9 |  |  | 1.8 |  |
| Prepayments and accrued income |  | 7.7 |  |  | 10.5 |  |
| Derivative financial instruments |  | 0.1 |  |  | 2.1 |  |
| Other receivables |  | 4.2 |  |  | 4.2 |  |
| Total accounts and other receivables |  | $ | 62.7 |  |  | $ | 72.4 |  |
| Inventories |  |  |  |  |
| Raw materials and supplies |  | $ | 30.5 |  |  | $ | 31.0 |  |
| Work-in-process |  | 33.1 |  |  | 28.1 |  |
| Finished goods |  | 30.0 |  |  | 23.1 |  |
| Total inventories |  | $ | 93.6 |  |  | $ | 82.2 |  |
| Other current assets |  |  |  |  |
| Held-for-sale assets |  | $ | 10.7 |  |  | $ | — |  |
| Income tax receivable |  | — |  |  | 1.2 |  |
| Total other current assets |  | $ | 10.7 |  |  | $ | 1.2 |  |
| Property, plant and equipment, net |  |  |  |  |
| Land, buildings and leasehold improvements |  | $ | 73.3 |  |  | $ | 80.8 |  |
| Machinery and equipment |  | 286.0 |  |  | 292.7 |  |
| Construction in progress |  | 10.1 |  |  | 6.7 |  |
| Total property plant and equipment |  | 369.4 |  |  | 380.2 |  |
| Accumulated depreciation and impairment |  | (262.5 | ) |  | (251.1 | ) |
| Total property, plant and equipment, net |  | $ | 106.9 |  |  | $ | 129.1 |  |
| Other non-current assets |  |  |  |  |
| Derivative financial instruments |  | $ | — |  |  | $ | 0.3 |  |
| Total other non-current assets |  | $ | — |  |  | $ | 0.3 |  |
| Current maturities of long-term debt and short-term borrowings |  |  |  |  |
| Bank and other loans |  | $ | — |  |  | $ | 15.0 |  |
| Overdrafts |  | 3.5 |  |  | 4.2 |  |
| Total current maturities of long-term debt and short-term borrowings |  | $ | 3.5 |  |  | $ | 19.2 |  |
| Other current liabilities |  |  |  |  |
| Contingent liabilities |  | $ | 5.3 |  |  | $ | 2.8 |  |
| Held-for-sale liabilities |  | 2.5 |  |  | — |  |
| Derivative financial instruments |  | — |  |  | 1.5 |  |
| Other current liabilities |  | 4.1 |  |  | 2.1 |  |
| Total other current liabilities |  | $ | 11.9 |  |  | $ | 6.4 |  |
| Other non-current liabilities |  |  |  |  |
| Contingent liabilities |  | $ | 0.8 |  |  | $ | 1.1 |  |
| Derivative financial instruments |  | — |  |  | 0.4 |  |
| Other non-current liabilities |  | 0.5 |  |  | 1.7 |  |
| Total other non-current liabilities |  | $ | 1.3 |  |  | $ | 3.2 |  |
7. Supplementary balance sheet information (continued) Impairment of property, plant and equipment Property, plant and equipment, net, includes an impairment of $6.6 million recognized within restructuring charges in 2018 (2017: $2.8 million) of which $1.5 million (2017: $1.3 million) relates to the write-down of land and buildings within the Elektron segment as a result of announced exits, and $5.1 million (2017: $1.5 million) relates to rationalization activity in the Gas Cylinders segment. Held-for-sale assets During 2018, two buildings valued at $4.7 million, within our Elektron Segment are classified as held-for-sale assets, presented within other current assets. The buildings are part of separate site closures announced in 2017 (Riverhead, NY) and early 2018 (Findlay, OH) and are readily available for sale. The buildings have been impaired to their fair value less costs to sell, with the impairment ($1.1 million) disclosed within restructuring charges in the consolidated statement of income. We expect the sale of the properties to be completed in the first half of 2019. The Company was actively marketing and was in 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. This led to the business being classified as held-for-sale and written down to fair value less costs to sell. An offer was received and subsequently accepted in February 2019. The $3.4 million charge is presented within impairment charges in the consolidated statement of income and has been allocated to property, plant and equipment. We expect the transaction to complete in the first half of 2019. The respective assets and liabilities of the above disposal groups have been reclassified as held-for-sale within other current assets and other current liabilities per the table below.
| Reclassified to held-for-sale assets | December 31, 2018 |  |
| In millions |  |
| Property, plant and equipment | $ | 5.5 |  |
| Inventory | 2.9 |  |
| Accounts and other receivables | 2.3 |  |
| Held-for-sale assets | $ | 10.7 |  |
| Reclassified to held-for-sale liabilities |  |
| Accounts payables | $ | 2.5 |  |
| Held-for-sale liabilities | $ | 2.5 |  |
As a result of items reclassified to held-for-sale, there has been no reclassification of items from other comprehensive income to the income statement. There were no held-for-sale assets or liabilities at December 31, 2017.

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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -URI http://asc.fasb.org/topic&trid=2122208 + Details
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