XML 109 R93.htm IDEA: XBRL DOCUMENT
v3.19.1

Intangible Assets - Change in Carrying Value of Intangible Assets (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2017
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | $ 89,652 |  |
Amortization | 15,783 | $ 15,505 | $ 20,539
Ending balance | 80,188 | 89,652 |
Gross carrying value [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 346,860 | 336,840 |
Additions | 7,556 | 7,619 |
Translation adjustments | (8,662) | 2,401 |
Ending balance | 345,754 | 346,860 | 336,840
Accumulated depreciation and amortization [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 257,208 | 240,216 |
Amortization | 15,783 | 15,505 |
Translation adjustments | (7,425) | 1,487 |
Ending balance | 265,566 | 257,208 | 240,216
Customer contracts [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 6,455 |  |
Ending balance | 3,574 | 6,455 |
Customer contracts [member] | Gross carrying value [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 167,094 | 167,001 |
Translation adjustments | (5,146) | 93 |
Ending balance | 161,948 | 167,094 | 167,001
Customer contracts [member] | Accumulated depreciation and amortization [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 160,639 | 157,976 |
Amortization | 2,675 | 2,725 |
Translation adjustments | (4,940) | (62) |
Ending balance | 158,374 | 160,639 | 157,976
Customer relationships [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 56,114 |  |
Ending balance | 52,249 | 56,114 |
Customer relationships [member] | Gross carrying value [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 122,862 | 121,922 |
Translation adjustments | (1,225) | 940 |
Ending balance | 121,637 | 122,862 | 121,922
Customer relationships [member] | Accumulated depreciation and amortization [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 66,748 | 62,175 |
Amortization | 3,671 | 3,700 |
Translation adjustments | (1,031) | 873 |
Ending balance | 69,338 | 66,748 | 62,175
Intellectual property rights [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 176 |  |
Ending balance | 51 | 176 |
Intellectual property rights [member] | Gross carrying value [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 4,581 | 3,861 |
Additions |  | 250 |
Translation adjustments | (298) | 470 |
Ending balance | 4,283 | 4,581 | 3,861
Intellectual property rights [member] | Accumulated depreciation and amortization [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 4,405 | 3,861 |
Amortization | 125 | 74 |
Translation adjustments | (298) | 470 |
Ending balance | 4,232 | 4,405 | 3,861
Trade names [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 338 |  |
Ending balance | 146 | 338 |
Trade names [member] | Gross carrying value [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 653 | 653 |
Translation adjustments | (6) |  |
Ending balance | 647 | 653 | 653
Trade names [member] | Accumulated depreciation and amortization [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 315 | 80 |
Amortization | 192 | 236 |
Translation adjustments | (6) | (1) |
Ending balance | 501 | 315 | 80
Technology [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 5,167 |  |
Ending balance | 4,335 | 5,167 |
Technology [member] | Gross carrying value [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 6,125 | 6,131 |
Translation adjustments | (73) | (6) |
Ending balance | 6,052 | 6,125 | 6,131
Technology [member] | Accumulated depreciation and amortization [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 958 | 172 |
Amortization | 776 | 790 |
Translation adjustments | (17) | (4) |
Ending balance | 1,717 | 958 | 172
Leasehold benefits [member] | Gross carrying value [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 1,835 | 1,835 |
Ending balance | 1,835 | 1,835 | 1,835
Leasehold benefits [member] | Accumulated depreciation and amortization [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 1,835 | 1,835 |
Ending balance | 1,835 | 1,835 | 1,835
Covenant not-to-compete [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 6,175 |  |
Ending balance | 3,842 | 6,175 |
Covenant not-to-compete [member] | Gross carrying value [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 9,461 | 9,451 |
Translation adjustments | (172) | 10 |
Ending balance | 9,289 | 9,461 | 9,451
Covenant not-to-compete [member] | Accumulated depreciation and amortization [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 3,286 | 964 |
Amortization | 2,240 | 2,310 |
Translation adjustments | (79) | 12 |
Ending balance | 5,447 | 3,286 | 964
Service mark [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 400 |  |
Ending balance | 400 | 400 |
Service mark [member] | Gross carrying value [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 400 | 400 |
Ending balance | 400 | 400 | 400
Software [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 14,827 |  |
Ending balance | 15,591 | 14,827 |
Software [member] | Gross carrying value [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 33,849 | 25,586 |
Additions | 7,556 | 7,369 |
Translation adjustments | (1,742) | 894 |
Ending balance | 39,663 | 33,849 | 25,586
Software [member] | Accumulated depreciation and amortization [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Beginning balance | 19,022 | 13,153 |
Amortization | 6,104 | 5,670 |
Translation adjustments | (1,054) | 199 |
Ending balance | $ 24,072 | $ 19,022 | $ 13,153

X
- Definition The amount of additions to intangible assets other than goodwill, other than those acquired through business combinations. [Refer: Business combinations [member]; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2018-01-01 -Paragraph 118 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2018-03-01&anchor=para_118_e_i&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of amortisation of intangible assets other than goodwill. [Refer: Depreciation and amortisation expense; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2018-01-01 -Paragraph 118 -Subparagraph e -Clause vi -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2018-03-01&anchor=para_118_e_vi&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition The increase (decrease) in intangible assets other than goodwill resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2018-01-01 -Paragraph 118 -Subparagraph e -Clause vii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2018-03-01&anchor=para_118_e_vii&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of identifiable non-monetary assets without physical substance. This amount does not include goodwill. [Refer: Goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2018-01-01 -Paragraph 118 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2018-03-01&anchor=para_118_e&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 54 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_54_c&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_IntangibleAssetsOtherThanGoodwill
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis=ifrs-full_GrossCarryingAmountMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis=ifrs-full_AccumulatedDepreciationAndAmortisationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=wns_CustomerContracts1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=wns_CustomerRelationships1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=wns_IntellectualProperty1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=wns_TradeNames1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=ifrs-full_TechnologybasedIntangibleAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=wns_LeaseHoldBenefitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=wns_CovenantNotToCompeteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=wns_ServiceMarkMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=ifrs-full_ComputerSoftwareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |