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Income taxes - Narrative (Details) - USD ($) $ in Millions | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022
Domestic Tax Authority |  |
Valuation Allowance [Line Items] |  |
Change in valuation allowance, deferred tax asset |  | $ (52.8)
Foreign Tax Authority |  |
Valuation Allowance [Line Items] |  |
Change in valuation allowance, deferred tax asset | $ 1.0 |
Foreign Tax Authority | BRAZIL |  |
Valuation Allowance [Line Items] |  |
Change in valuation allowance, deferred tax asset | $ 7.0 |

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- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-2 + Details
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- Details
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