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Factoring of Accounts Receivable (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Total Factored
Factoring of Accounts Receivable [Line Items]
Accounts receivable sold	$ 23.3	$ 22.3	$ 59.4	$ 149.8
Discounts and Fees
Factoring of Accounts Receivable [Line Items]
Accounts receivable sold	$ 0.1	$ 0.0	$ 0.1	$ 0.3

X

- Definition

Accounts Receivable Sold without Recourse

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No definition available.

+ Details

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Period Type:	duration

X

- Definition

[Line Items] for Factoring of Accounts Receivable [Table]

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No definition available.

+ Details

Name:	amkr_FactoringofAccountsReceivableLineItems
Namespace Prefix:	amkr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	amkr_FactoringofAccountsReceivableAxis=amkr_FactoringFeesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: