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Finance and operating leases - Supplemental balance sheet information (Details)	Dec. 31, 2023	Dec. 31, 2022
Weighted-average remaining lease term (in years):
Finance leases	2 years 7 months 6 days	1 year 10 months 24 days
Operating leases	10 years 3 months 18 days	10 years 2 months 12 days
Weighted-average discount rate:
Finance leases	5.19%	3.53%
Operating leases	4.59%	4.64%

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Weighted average discount rate for finance lease calculated at point in time.

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Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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-Topic 842
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