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Shareholders' equity - Narrative (Details) |  |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2021 USD ($) shares | Aug. 12, 2020 shares | Jul. 06, 2020 shares | Feb. 15, 2019 USD ($) shares | Dec. 31, 2021 vote $ / shares shares | Dec. 31, 2020 shares | Dec. 31, 2019 shares | Dec. 31, 2018 $ / shares shares | May 22, 2018 USD ($) $ / shares
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Common stock authorized (in shares) |  |  |  |  | 500,000,000 |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  |  |  |  | $ 0 |  |  | $ 0 |
Common stock outstanding (in shares) |  |  |  |  |  |  |  | 205,232,247 |
Repurchased share distributed (in shares) | 2,960,926 |  |  |  |  |  |  |  |
Common stock issued (in shares) |  |  |  |  | 210,478,322 | 207,265,773 | 204,070,029 | 205,232,247 |
Stock Dividends to Arcos Dorados Holdings Inc.’s shareholders, Shares |  |  | 0.0142857 |  |  |  |  |  |
Dividends paid, cash | $ | $ 21 |  |  |  |  |  |  |  |
Class A |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Common stock authorized (in shares) |  |  |  |  | 420,000,000 |  |  |  |
Common stock outstanding (in shares) |  |  |  |  |  |  |  | 125,232,247 |
Shares issued during the period (in shares) |  |  |  |  | 251,623 | 472,130 | 470,558 |  |
Repurchased share distributed (in shares) | 2,960,926 | 2,723,614 |  |  |  |  |  |  |
Common stock issued (in shares) |  |  |  |  | 130,478,322 | 127,265,773 | 124,070,029 | 125,232,247 |
Number of votes per share (in votes) | vote |  |  |  |  | 1 |  |  |  |
Class B |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Common stock authorized (in shares) |  |  |  |  | 80,000,000 |  |  |  |
Common stock outstanding (in shares) |  |  |  |  |  |  |  | 80,000,000 |
Common stock issued (in shares) |  |  |  |  | 80,000,000 | 80,000,000 | 80,000,000 | 80,000,000 |
Number of votes per share (in votes) | vote |  |  |  |  | 5 |  |  |  |
The Repurchase Program |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Number of shares repurchased (in shares) |  |  |  | 7,993,602 |  |  |  |  |
Value of shares repurchased | $ |  |  |  | $ 60,000,000 |  |  |  |  |
The Repurchase Program | Class A |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 0
Shares authorized, value | $ |  |  |  |  |  |  |  |  | $ 60,000,000

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