Related party transactions - Additional information (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2024	Mar. 31, 2023
Disclosure of transactions between related parties [abstract]
Investment commitments amount, related party transactions	¥ 5,905	¥ 39,047

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