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Derivative and hedging activities - Narrative (Details)
€ in Millions
Mar. 31, 2026
USD ($)
Mar. 31, 2026
EUR (€)
Dec. 31, 2025
USD ($)
Nov. 30, 2025
EUR (€)
Apr. 30, 2025
USD ($)
Derivatives, Fair Value [Line Items]          
Gross amount $ 3,835,900,000   $ 3,967,900,000    
Foreign exchange products | Designated as Hedging Instrument | Senior Unsecured Notes, 3 Point 875 Percent, Due July 15, 2028          
Derivatives, Fair Value [Line Items]          
Derivative liability | €   € 57.0   € 144.0  
Interest rate       3.875%  
Gross amount | €       € 400.0  
Foreign currency denominated debt | Designated as Hedging Instrument | 3.875% unsecured notes          
Derivatives, Fair Value [Line Items]          
Accumulated loss related to the foreign currency denominated debt designated as net investment hedges 6,100,000   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