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Inventories | 12 Months Ended
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Mar. 31, 2021
Inventory Disclosure [Abstract] |
Inventories | Inventories Inventories consist of the following components:
| 31 March
(Millions of US dollars) | 2021 |  | 2020
Finished goods | $ | 149.9 |  |  | $ | 224.4 |
Work-in-process | 17.9 |  |  | 25.2 |
Raw materials and supplies | 60.4 |  |  | 69.9 |
Provision for obsolete finished goods and raw materials | (9.9) |  |  | (14.4) |
Total inventories | $ | 218.3 |  |  | $ | 305.1 |
The Company identified an immaterial classification error in its 31 March 2020 Inventories footnote which included an understatement in Work-in-process and an overstatement in the Raw materials and supplies balance of US$17.1 million. As such, the prior year amounts above have been reclassified to conform with the current year presentation.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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