XML 151 R136.htm IDEA: XBRL DOCUMENT v3.8.0.1

Earning Per Share - Additional Information (Detail) - shares	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Earnings per share [abstract]
Shares excluded from the calculation of diluted EPS options and RSUs since their effect is anti-dilutive	27,350	5,200	46,033

X

- References

No definition available.

+ Details

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

X

- Definition

Shares excluded from computation of diluted earnings per share since their effect is anti-dilutive.

+ References

No definition available.

+ Details

Name:	wns_SharesExcludedFromComputationOfDilutedEarningsPerShare
Namespace Prefix:	wns_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration