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Related party transactions - Summary of Related Party Transactions (Details) - Axionlog Distribution B.V. - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Related Party Transaction [Line Items] |  |  |
Food and paper | $ (124,416) | $ (188,276) | $ (177,356)
Occupancy and other operating expenses | (3,667) | (7,252) | (5,322)
Logistics service fees from related party | 24,303 | 38,658 | 41,633
Suppliers purchase expense related party | $ 100,114 | $ 149,618 | $ 135,723

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- Definition Food and paper from related party + References No definition available. + Details
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Namespace Prefix: | arco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Logistics service fees from related party + References No definition available. + Details
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Namespace Prefix: | arco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Suppliers purchase expense related party + References No definition available. + Details
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Namespace Prefix: | arco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
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Balance Type: | debit
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- Definition 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. + References No definition available. + Details
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- Details
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