Related party transactions - Additional information (Detail) ¥ in Millions	Mar. 31, 2022 JPY (¥)
Disclosure of transactions between related parties [abstract]
Investment commitments amount, related party transactions	¥ 39,231

Investment commitments amount,related party transactions.

No definition available.

Name:	sony_InvestmentCommitmentsAmountrelatedPartyTransactions
Namespace Prefix:	sony_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant