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Leases and commitments - Maturities of Lease Liabilities, Topic 842 (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Finance Leases
2024	$ 0.3
2025	0.0
2026	0.0
2027	0.0
2028	0.0
Thereafter	0.0
Total lease payments	0.3
Less imputed interest	0.0
Total	0.3	$ 1.1
Operating Leases
2024	22.7
2025	12.6
2026	9.1
2027	3.4
2028	2.0
Thereafter	4.2
Total lease payments	54.0
Less imputed interest	9.3
Total	$ 44.7	$ 55.7

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