XML 136 R121.htm IDEA: XBRL DOCUMENT v3.8.0.1

Share-based Payments - Summary of Share-based Compensation Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Share-based compensation expense	$ 30,565	$ 23,036	$ 17,919
Cost of revenue [member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Share-based compensation expense	3,770	2,765	1,923
Selling and marketing expenses [member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Share-based compensation expense	2,557	1,723	1,370
General and administrative expenses [member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Share-based compensation expense	$ 24,238	$ 18,548	$ 14,626

X

- Definition

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.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of expense from share-based payment transactions with employees.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	wns_IncomeStatementLocation1Axis=wns_CostOfRevenueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	wns_IncomeStatementLocation1Axis=wns_SellingAndMarketingExpensesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	wns_IncomeStatementLocation1Axis=wns_GeneralAndAdministrativeExpensesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: