v3.25.2
Fair value measurements (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Kloosterboer Preference Shares $ 285 $ 247
Fair Value, Inputs, Level 2 | Fair Value, Recurring | Interest Rate Contract    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 36 69
Fair Value, Inputs, Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 5,691 4,868
Kloosterboer Preference Shares 282 259
Fair Value, Inputs, Level 3 | Fair Value, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Acquisition related contingent consideration 14 13
Put options - exercised not settled 50 0
Put options - not exercised 92 107
Fair Value, Inputs, Level 3 | Fair Value, Nonrecurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other investments (included in other assets) $ 20 $ 18