Income taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Tax Disclosure [Abstract]
Provision (benefit) for income taxes (in millions)	$ 20.3	$ (41.1)
Effective tax rate	53.60%	(123.80%)