v3.26.3
Intangible assets - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
HMH Holding BV And Subsidiaries [Member]    
Intangible Asset, Finite-Lived [Line Items]    
Amortization expense $ 24.3 $ 20.7