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IMPAIRMENT OF NONFINANCIAL ASSETS (Details)
12 Months Ended
Mar. 31, 2018
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%