Segment Reporting - Additional Information (Details) - Customer	12 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Information About Major Customers [Abstract]
Number of client individually accounted for more than 10% of revenue	0	0

Number of customers accounted for more than ten percent of revenue.

No definition available.

Name:	infy_NumberOfCustomersAccountedForMoreThanTenPercentOfRevenue
Namespace Prefix:	infy_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration