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EMPLOYEE BENEFITS OBLIGATIONS - Significant Assumptions Weighted (Details) | Mar. 31, 2018 | Mar. 31, 2017
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Canadian |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |
Actuarial assumption of discount rates, pension obligation | 3.48% | 3.78%
Actuarial assumption of expected rates of salary increases, pension obligation | 3.66% | 3.50%
Actuarial assumption of discount rates, net pension cost | 3.78% | 3.96%
Actuarial assumption of expected rates of salary increases, net pension cost | 3.50% | 3.50%
Foreign |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |
Actuarial assumption of discount rates, pension obligation | 1.88% | 2.05%
Actuarial assumption of expected rates of salary increases, pension obligation | 2.86% | 2.82%
Actuarial assumption of discount rates, net pension cost | 2.05% | 2.26%
Actuarial assumption of expected rates of salary increases, net pension cost | 2.82% | 2.86%

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- Definition The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 144 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_144&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The expected rate of salary increases used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [member]; Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 144 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_144&doctype=Standard -URIDate 2017-03-09 + Details
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