XML 117 R101.htm IDEA: XBRL DOCUMENT v3.19.1

Financial Instruments - Carrying Value and Fair Value of Financial Instruments by Class (Parenthetical) (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Apr. 01, 2018	Mar. 31, 2018
Disclosure of detailed information about financial instruments [line items]
Unbilled revenue	$ 66,752	$ 61,721	$ 61,721
Prepayments and other assets	16,783	26,367	24,847
Other non-current assets	44,239	48,165	42,388
Unamortised debt issuance cost	409		769
Other employee obligations	68,121	64,617	64,617
Other liabilities	10,294	$ 15,739	15,739
Non-financial instruments [member]
Disclosure of detailed information about financial instruments [line items]
Unbilled revenue	1,457
Prepayments and other assets	11,408		20,437
Other non-current assets	34,931		32,145
Unamortised debt issuance cost	409		769
Other employee obligations	16,240		14,892
Other liabilities	$ 13,768		$ 13,566

X

- Definition

The amount of current prepayments and other current assets. [Refer: Other current assets; Current prepayments]

+ 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_CurrentPrepaymentsAndOtherCurrentAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The amount of current provisions for employee benefits. [Refer: Provisions for employee benefits]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 78
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78_d&doctype=Standard
-URIDate 2018-03-16

+ Details

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

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

X

- Definition

The amount of current liabilities that the entity does not separately disclose in the same statement or note. [Refer: Current liabilities]

+ 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_OtherCurrentLiabilities
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

Unamortized debt issuance costs netted off with the amount of non-current borrowings.

+ References

No definition available.

+ Details

Name:	wns_UmamortisedDebtIssueCost
Namespace Prefix:	wns_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of revenue recognised on an accrual basis when services are performed from the end of last billing to the reporting date.

+ References

No definition available.

+ Details

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

X

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=wns_NonFinancialInstrumentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: