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Finance and operating leases - Supplemental balance sheet information (Details)	Dec. 31, 2024	Dec. 31, 2023
Weighted-average remaining lease term (in years):
Finance leases	3 years 6 months	2 years 7 months 6 days
Operating leases	9 years 10 months 24 days	10 years 3 months 18 days
Weighted-average discount rate:
Finance leases	5.65%	5.19%
Operating leases	5.02%	4.59%

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

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 53
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479589/842-20-55-53

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-URI https://asc.fasb.org/1943274/2147478964/842-20-50-4

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