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Factoring of Accounts Receivable (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Total Factored |  |  |  |
Factoring of Accounts Receivable [Line Items] |  |  |  |
Accounts receivable sold | $ 22.3 | $ 82.3 | $ 149.8 | $ 247.8
Discounts and Fees |  |  |  |
Factoring of Accounts Receivable [Line Items] |  |  |  |
Accounts receivable sold | $ 0.0 | $ 0.2 | $ 0.3 | $ 0.6

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- Definition Accounts Receivable Sold without Recourse + References No definition available. + Details
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Namespace Prefix: | amkr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition [Line Items] for Factoring of Accounts Receivable [Table] + References No definition available. + Details
Name: | amkr_FactoringofAccountsReceivableLineItems
Namespace Prefix: | amkr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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