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Financial instruments fair value - Narrative (Details) - Convertible Senior Notes Due 2026 - Convertible Debt - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Sep. 17, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Principal amount     $ 373.8
Debt issuances costs capitalized $ 5.5 $ 6.8