Financial liabilities - Summary of Asset Pledged as Collateral (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2025	Mar. 31, 2024
Disclosure of financial liabilities [abstract]
Property, plant and equipment	¥ 1,616,300	¥ 1,574,373
Other assets	7,936,375	6,731,856
Total	¥ 9,552,674	¥ 8,306,230

The amount of property, plant and equipment pledged as security for liabilities. [Refer: Property, plant and equipment]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2024-01-01
-Paragraph 74
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_74_a&doctype=Standard
-URIDate 2024-03-27

Name:	ifrs-full_PropertyPlantAndEquipmentPledgedAsSecurity
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant