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v3.20.1

Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
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Mar. 31, 2020
Equity [Abstract] |
Accumulated Other Comprehensive Loss |
(Millions of US dollars) |  | Cash Flow Hedges |  | Pension Actuarial Gain |  | Foreign Currency Translation Adjustments |  | Total
Balance at 31 March 2019 |  | $ | 0.2 |  |  | $ | — |  |  | $ | (30.5 | ) |  | $ | (30.3 | )
Other comprehensive gain (loss) |  | — |  |  | 0.8 |  |  | (32.6 | ) |  | (31.8 | )
Balance at 31 March 2020 |  | $ | 0.2 |  |  | $ | 0.8 |  |  | $ | (63.1 | ) |  | $ | (62.1 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
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