Restructuring charges - Narrative (Details) $ in Millions	1 Months Ended
	Aug. 31, 2024 employee	May 31, 2024 employee positions	Aug. 31, 2023 employee	Jan. 31, 2023 employee	Mar. 31, 2025 USD ($)
January 2023 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Workforce reduction | employee				125
Restructuring charges incurred since inception | $					$ 9.3
August 2023 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Workforce reduction | employee			400
Restructuring charges incurred since inception | $					19.4
May 2024 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Workforce reduction | employee		300
Restructuring charges incurred since inception | $					19.1
Number of currently vacant positions eliminated | positions		85
August 2024 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Workforce reduction | employee	70
Restructuring charges incurred since inception | $					$ 2.7