Reconciliation of Basic and Diluted Shares Used in Computing Earnings Per Equity Share - Additional Information (Details) - shares	12 Months Ended
Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Weighted Average Shares And Adjusted Weighted Average Shares [Abstract]
Number of options with anti-dilutive effect	67,238	112,190	0

Instruments with potential future dilutive effect not included in calculation of diluted earnings per share, share options.

No definition available.

Name:	infy_InstrumentsWithPotentialFutureDilutiveEffectNotIncludedInCalculationOfDilutedEarningsPerShareShareOptions
Namespace Prefix:	infy_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration