Earnings per share - Narrative (Details) shares in Millions	12 Months Ended
Dec. 31, 2024 shares	Dec. 31, 2023 shares	Dec. 31, 2022 shares
Disclosure of earnings per share [Abstract]
Number of shares reserved for issue under options and contracts for sale of shares (in shares)	71	180	198
Number of instruments that are antidilutive in period presented	16	41	63

The number of shares reserved for issue under options and contracts for the sale of shares.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 79
-Subparagraph a
-Clause vii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_79_a_vii&doctype=Standard
-URIDate 2024-03-27

Name:	ifrs-full_SharesReservedForIssueUnderOptionsAndContractsForSaleOfShares
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant