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IMPAIRMENT OF NONFINANCIAL ASSETS - Narrative (Details)	12 Months Ended
	Mar. 31, 2019
Disclosure of reconciliation of changes in goodwill [line items]
Growth rate used to extrapolate cash flow projections, period	5 years
Bottom of range
Disclosure of reconciliation of changes in goodwill [line items]
Discount rate applied to cash flow projections	6.50%
Top of range
Disclosure of reconciliation of changes in goodwill [line items]
Discount rate applied to cash flow projections	9.00%
Civil Aviation Training Solutions, Defense and Security and Healthcare | Bottom of range
Disclosure of reconciliation of changes in goodwill [line items]
Growth rate used to extrapolate cash flow projections	2.00%
Civil Aviation Training Solutions, Defense and Security and Healthcare | Top of range
Disclosure of reconciliation of changes in goodwill [line items]
Growth rate used to extrapolate cash flow projections	3.00%

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The discount rate applied to cash flow projections for a cash-generating unit (group of units). [Refer: Cash-generating units [member]]

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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