XML 141 R120.htm IDEA: XBRL DOCUMENT
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Employee benefit obligations - Defined benefit schemes (Details) - customer | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Funded | Europe / UK |  |
Disclosure of defined benefit plans [line items] |  |
Deferred members | 491 | 589
Pensioners including dependents | 573 | 531
Weighted average duration (years) | 12 years | 13 years
Funded | North America |  |
Disclosure of defined benefit plans [line items] |  |
Active members | 656 | 699
Deferred members | 129 | 113
Pensioners including dependents | 153 | 135
Weighted average duration (years) | 14 years | 14 years
Unfunded | Europe/ Germany |  |
Disclosure of defined benefit plans [line items] |  |
Active members | 643 | 723
Deferred members | 298 | 244
Pensioners including dependents | 202 | 181
Weighted average duration (years) | 15 years | 16 years

X
- Definition Represents the number of active members. + References No definition available. + Details
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Namespace Prefix: | ambp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of deferred members. + References No definition available. + Details
Name: | ambp_NumberOfDeferredMembers
Namespace Prefix: | ambp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of pensioners including dependents. + References No definition available. + Details
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Namespace Prefix: | ambp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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

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- Definition The weighted average duration of a defined benefit obligation. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 147 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_147_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=ambp_EuropeUkMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=srt_NorthAmericaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=ambp_EuropeGermanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |