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v3.23.2

Related party transactions (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Other related party transactions |  |  |  |
Other related party transactions |  |  | $ 0 |
AGSA |  |  |  |
Related party borrowings and receivables |  |  |  |
Transaction and other costs reimbursed to (from) AGSA |  | $ 1 | 2 | $ (12)
AGSA | Selling, general and administrative expenses |  |  |  |
Related party borrowings and receivables |  |  |  |
Corporate and business unit services | $ 10 | $ 9 | $ 19 | $ 19

X
- Definition The aggregate net amount of other related party transactions. + References No definition available. + Details
Name: | ambp_OtherRelatedPartyTransactions
Namespace Prefix: | ambp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition No definition. + References No definition available. + Details
Name: | ambp_OtherRelatedPartyTransactionsAbstract
Namespace Prefix: | ambp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of transaction and other costs reimbursed during the period. + References No definition available. + Details
Name: | ambp_TransactionAndOtherCostsReimbursed
Namespace Prefix: | ambp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition The amount of services received in related party transactions. [Refer: Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 24 -IssueDate 2022-03-24 -Paragraph 21 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2022-en-r&anchor=para_21_c&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_ServicesReceivedRelatedPartyTransactions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=ifrs-full_ParentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis=ifrs-full_SellingGeneralAndAdministrativeExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |