Derivative and hedging activities - Narrative (Details) € in Millions	Sep. 30, 2026 USD ($)	Sep. 30, 2026 EUR (€)	Dec. 31, 2025 USD ($)	Apr. 30, 2025 USD ($)
Euro term loans A-1 | Euro | Senior secured credit facilities:
Derivatives, Fair Value [Line Items]
Interest rate	3.783%	3.783%
Euro term loans B-6 | Euro | Senior secured credit facilities:
Derivatives, Fair Value [Line Items]
Interest rate	0.00%	0.00%
3.875% unsecured notes | Notes
Derivatives, Fair Value [Line Items]
Interest rate	3.875%	3.875%
Foreign exchange products | Designated as Hedging Instrument | Euro term loans A-1 | Senior secured credit facilities:
Derivatives, Fair Value [Line Items]
Derivative liability | €		€ 385.0
Foreign exchange products | Designated as Hedging Instrument | Euro term loans B-6
Derivatives, Fair Value [Line Items]
Derivative liability | €		8.1
Foreign exchange products | Designated as Hedging Instrument | 3.875% unsecured notes | Notes
Derivatives, Fair Value [Line Items]
Derivative liability | €		€ 400.0
Foreign currency denominated debt | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Accumulated loss related to the foreign currency denominated debt designated as net investment hedges	$ 28,900,000		$ 3,000,000.0
Cross-currency swaps
Derivatives, Fair Value [Line Items]
Derivative, notional amount			750,000,000.0
Cross-currency swaps | Net Investment Hedging
Derivatives, Fair Value [Line Items]
Derivative, notional amount	$ 750,000,000.0
Cross Currency Interest Rate Contract, Maturing In April 2027
Derivatives, Fair Value [Line Items]
Derivative, notional amount				$ 250,000,000.0
Cross Currency Interest Rate Contract, Maturing In April 2028
Derivatives, Fair Value [Line Items]
Derivative, notional amount				250,000,000.0
Cross Currency Interest Rate Contract, Maturing In April 2029
Derivatives, Fair Value [Line Items]
Derivative, notional amount				$ 250,000,000.0
Interest rate products
Derivatives, Fair Value [Line Items]
Derivative, notional amount			$ 100,000,000.0