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COMMITMENTS (Tables) | 12 Months Ended
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Mar. 31, 2019
Other Provisions, Contingent Liabilities And Contingent Assets [Abstract] |
Disclosure of maturity analysis of operating lease payments | The future aggregate minimum lease payments under non-cancellable operating leases are as follows:
|  | 2019 |  |  | 2018 |
No later than 1 year | $ | 50.7 |  | $ | 44.4 |
Later than 1 year and no later than 5 years |  | 136.9 |  |  | 118.9 |
Later than 5 years |  | 86.5 |  |  | 76.7 |
| $ | 274.1 |  | $ | 240.0 |
Contractual Obligation, Fiscal Year Maturity Schedule | The total contractual purchase commitments are as follows:
|  | 2019 |  |  | 2018 |
No later than 1 year | $ | 240.2 |  | $ | 132.0 |
Later than 1 year and no later than 5 years |  | 51.5 |  |  | 90.7 |
Later than 5 years |  | — |  |  | 0.5 |
| $ | 291.7 |  | $ | 223.2 |

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- Definition Contractual Obligation, Fiscal Year Maturity Schedule1 [Table Text Block] + References No definition available. + Details
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- Definition Other Provisions, Contingent Liabilities And Contingent Assets [Abstract] + References No definition available. + Details
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- Definition The disclosure of a maturity analysis of operating lease payments. Operating lease is a lease that does not transfer substantially all the risks and rewards incidental to ownership of an underlying asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2019-01-01 -Name IFRS -Number 16 -IssueDate 2018-01-01 -Paragraph 97 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=16&date=2018-03-01&anchor=para_97&doctype=Standard -URIDate 2018-03-16 + Details
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