Details of treasury and other financial risks - Range of payment due dates (Detail)	Dec. 31, 2025	Dec. 31, 2024
Bottom of range
Disclosure of financial liabilities that are part of supplier finance arrangements [line items]
Liabilities that are part of the arrangements	60 days	30 days
Comparable trade payables that are not part of the arrangements	0 days	0 days
Top of range
Disclosure of financial liabilities that are part of supplier finance arrangements [line items]
Liabilities that are part of the arrangements	135 days	135 days
Comparable trade payables that are not part of the arrangements	140 days	135 days

The number of days between invoice date and payment due date for comparable trade payables that are not part of a supplier finance arrangement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2025-01-01
-Paragraph 44H
-Subparagraph b
-Clause iii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2025-en-r&anchor=para_44H_b_iii&doctype=Standard
-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 168
-Subparagraph b
-Clause iii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_168_b_iii&doctype=Standard
-URIDate 2025-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 168
-Subparagraph b
-Clause iii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_168_b_iii&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_NumberOfDaysBetweenInvoiceDateAndPaymentDueDateForTradePayablesThatAreNotPartOfSupplierFinanceArrangements
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant