Financial Instruments - Schedule of Carrying Value and Fair Value of Financial Instruments by Categories (Parenthetical) (Details) - USD ($) $ in Millions	12 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Disclosure Of Financial Instruments [Abstract]
Interest accrued on quoted debt securities carried at amortized cost	$ 12	$ 13

Interest accrued on quoted debt securities carried at amortized cost.

No definition available.

Name:	infy_InterestAccruedOnQuotedDebtSecuritiesCarriedAtAmortizedCost
Namespace Prefix:	infy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration