Assets held for rent - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Assets held for rent, depreciation expense	$ 0.9	$ 0.9	$ 2.8	$ 2.7