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Accounts and Other Receivables (Tables) | 12 Months Ended
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Mar. 31, 2019
Receivables [Abstract] |
Components of Accounts and Other Receivables | Accounts and other receivables consist of the following components:
| 31 March
(Millions of US dollars) | 2019 |  | 2018
Trade receivables | $ | 245.5 |  |  | $ | 196.9 |
Other receivables and advances | 12.0 |  |  | 7.1 |
Provision for doubtful trade debts | (2.9 | ) |  | (1.3 | )
Total accounts and other receivables | $ | 254.6 |  |  | $ | 202.7 |
Provision for Doubtful Trade Debts | The following are changes in the provision for doubtful trade debts:
| 31 March
(Millions of US dollars) | 2019 |  | 2018 |  | 2017
Balance at beginning of period | $ | 1.3 |  |  | $ | 0.9 |  |  | $ | 1.1 |
Adjustment to provision | 2.8 |  |  | 0.6 |  |  | (0.1 | )
Write-offs, net of recoveries | (1.2 | ) |  | (0.2 | ) |  | (0.1 | )
Balance at end of period | $ | 2.9 |  |  | $ | 1.3 |  |  | $ | 0.9 |

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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