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SHARE-BASED PAYMENTS - LTI-PSU Activity (Details) - Long-Term Incentive – Performance Share Unit Plan (LTI-PSU) | 12 Months Ended
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Mar. 31, 2019 shares | Mar. 31, 2018 shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Units outstanding, beginning of year (in shares) | 1,230,717 | 1,308,064
Units granted (in shares) | 756,386 | 819,566
Units cancelled (in shares) | (25,491) | (50,376)
Units redeemed (in shares) | (820,412) | (846,537)
Units outstanding, end of year (in shares) | 1,141,200 | 1,230,717
Units vested, end of year (in shares) | 876,095 | 933,977

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- Definition Number of other equity instruments redeemed in share-based payment arrangement + References No definition available. + Details
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- Definition Number Of Other Equity Instruments Vested In Share-based Payment Arrangement + References No definition available. + Details
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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 2018-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_47_b&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_45&doctype=Standard -URIDate 2018-03-16 + 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 2018-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_45&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The number of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_45&doctype=Standard -URIDate 2018-03-16 + Details
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- Details
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