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Employee benefit obligations - Other employee benefits (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Employee benefit obligations. |  |
Long term employee benefits | $ 40 | $ 42

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- Definition The amount of long-term employee benefits obligations. + References No definition available. + Details
Name: | ambp_OtherLongTermEmployeeBenefitsObligations
Namespace Prefix: | ambp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | ifrs-full_DisclosureOfDefinedBenefitPlansAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration