XML 88 R72.htm IDEA: XBRL DOCUMENT v3.19.1

Impact on Adoption of New IFRS - Adoption of IFRS 9 - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Apr. 01, 2018	Mar. 31, 2018
Increase decrease due to application of new IFRS [line items]
Increase in retained earnings	$ 478,145	$ 372,712	$ 364,424
Increase in the losses in other components of equity	(146,894)	(118,295)	(115,534)
Increase trade receivables	73,872	71,462	71,388
Decrease in other non-current assets	$ 44,239	48,165	$ 42,388
Transition adjustments on adoption of IFRS 9 [member]
Increase decrease due to application of new IFRS [line items]
Increase in retained earnings		2,777
Increase in the losses in other components of equity		(2,761)
Increase trade receivables		74
Decrease in other non-current assets		$ (84)

X

- Definition

The amount of accumulated items of income and expense (including reclassification adjustments) that are not recognised in profit or loss as required or permitted by other IFRSs. [Refer: IFRSs [member]; Other comprehensive income]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_AccumulatedOtherComprehensiveIncome
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of non-current assets that the entity does not separately disclose in the same statement or note. [Refer: Non-current assets]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_OtherNoncurrentAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

A component of equity representing the entity's cumulative undistributed earnings or deficit.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 78
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78_e&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph IG6
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_IG6&doctype=Implementation%20Guidance
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_RetainedEarnings
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount due from customers or clients, within one year of the reporting date (or the normal operating cycle, whichever is longer), for goods or services that have been delivered or sold in the normal course of business reduced by an allowance estimated by the entity towards uncollectability of doubtful trade receivables.

+ References

No definition available.

+ Details

Name:	wns_CurrentTradeReceivablesNet
Namespace Prefix:	wns_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Increase decrease due to application of new IFRS.

+ References

No definition available.

+ Details

Name:	wns_IncreaseDecreaseDueToApplicationOfNewIfrsLineItems
Namespace Prefix:	wns_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	wns_ModifiedRetrospectiveApproachAdjustmentOnAdoptionOfNewIfrsAxis=wns_IncreaseDecreaseDueToApplicationOfIFRS9Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: