Fair value - Measurement inputs (Details)	Dec. 31, 2024
Weighted average discount rate for risk-free performance targets | Mobile Computing
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent consideration measurement input	0.201
Weighted average discount rate for risk-free performance targets | JUXT
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent consideration measurement input	0.105
Weighted average discount rate for risk-free performance targets | NextSphere
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent consideration measurement input	0.155
Weighted average discount rate for risk-free performance targets | Mutual Mobile
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent consideration measurement input	0.103
Discount rate for credit risk and time value | Mobile Computing
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent consideration measurement input	0.036
Discount rate for credit risk and time value | JUXT
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent consideration measurement input	0.038
Discount rate for credit risk and time value | NextSphere
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent consideration measurement input	0.077
Discount rate for credit risk and time value | Mutual Mobile
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent consideration measurement input	0.030