Share-based payments - Summary of Valuation Assumptions Used in Models (Details) - Long Term Incentive Plan	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]
Average share price volatility FMCG comparator group (%)	24.00%	24.00%
Average correlation FMCG comparator group (%)	30.00%	29.00%

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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