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

No definition available.

+ Details

Name:	us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The per share price of the Company's stock at which the contract holder of the freestanding contract has the right to purchase or sell the Company's stock at a future date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 40
-Section 50
-Paragraph 5
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=126731327&loc=d3e90205-114008

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(1)
-URI https://asc.fasb.org/extlink&oid=109262807&loc=d3e22047-110879

+ Details

Name:	us-gaap_ForwardContractIndexedToIssuersEquityForwardRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of issuer's shares to which the forward contract is indexed.

+ References

+ Details

Name:	us-gaap_ForwardContractIndexedToIssuersEquityIndexedShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares as a settlement alternative for each freestanding forward contract.

+ References

+ Details

Name:	us-gaap_ForwardContractIndexedToIssuersEquitySettlementAlternativesSharesAtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis=amcr_March2023AndMay2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Period Type:

Shareholders' Equity - Narrative (Details) - $ / shares shares in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022
May 2023 And September 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Forward contract indexed to issuer's equity, indexed shares (in shares)	10
Forward contract indexed to issuer's equity, forward rate per share (in USD per share)	$ 12.38
November 2022 and June 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Forward contract indexed to issuer's equity, indexed shares (in shares)			14
Forward contract indexed to issuer's equity, forward rate per share (in USD per share)		$ 12.67
Forward contract indexed to equity, settlement, number of shares (in shares)	11