Income taxes - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	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