v3.25.2
Fair value of financial instruments - Narrative (Details) - USD ($)
$ in Millions
6 Months Ended
Oct. 31, 2024
Jun. 30, 2025
Jul. 26, 2023
Jul. 12, 2022
G4S        
Derivative [Line Items]        
Contingent consideration   $ 24    
Foreign Exchange Contract | Not Designated as Hedging Instrument        
Derivative [Line Items]        
Notional value of nonderivative instruments   $ 881    
Weighted average maturity   1 month    
$215 million cross currency swap II | Designated as Hedging Instrument        
Derivative [Line Items]        
Weighted average maturity   9 months 18 days    
Notional value of derivative instrument     $ 215 $ 215
$215 million cross currency swap | Designated as Hedging Instrument        
Derivative [Line Items]        
Notional value of derivative instrument     $ 215  
Interest Rate Swap | Designated as Hedging Instrument        
Derivative [Line Items]        
Notional value of derivative instrument $ 775      
Cash proceeds from termination of interest rate swaps $ 19      
$100 million interest rate swap | Designated as Hedging Instrument        
Derivative [Line Items]        
Weighted average maturity   1 year    
Notional value of derivative instrument   $ 100