Income taxes - Narrative (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Estimated annual effective tax rate (percent)	110.00%
Unrecognized tax benefits that would impact effective tax rate	$ 52.1	$ 43.3
Unrecognized tax benefits, accrued interest and penalties	$ 4.4	$ 3.9
Estimated annual effective tax rate percent		43.30%