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SHARE-BASED PAYMENTS - LTI-PSU Activity (Details) | 12 Months Ended
--- | ---
Mar. 31, 2018 shares | Mar. 31, 2017 shares
Long-Term Incentive – Restricted Share Unit Plan (LTI-RSU) |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Units outstanding, beginning of year (in shares) | 0 | 378,919.94
Units granted (in shares) | 0 | 82,731
Units cancelled (in shares) | 0 | (5,698)
Units redeemed (in shares) | 0 | (455,953)
Units outstanding, end of year (in shares) | 0 | 0
Units vested, end of year (in shares) | 0 | 0
Long-Term Incentive – Performance Share Unit Plan (LTI-PSU) |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Units outstanding, beginning of year (in shares) | 1,308,063 | 934,500
Units granted (in shares) | 819,566 | 490,270
Units cancelled (in shares) | (50,376) | (108,727)
Units redeemed (in shares) | (846,537) | (7,980)
Units outstanding, end of year (in shares) | 1,230,716.000000 | 1,308,063
Units vested, end of year (in shares) | 933,977 | 956,057

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- Definition The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_47_b&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The number of other equity instruments (ie other than share options) forfeited in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45&doctype=Standard -URIDate 2017-03-09 + Details
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