v3.26.1
Fair value measurements - Schedule of Fair Value Measurements, Recurring and Nonrecurring (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Level 1 | Fair Value, Recurring    
Measured at fair value on a recurring basis:    
Non-qualified deferred compensation plan assets $ 8 $ 7
Non-qualified deferred compensation plan liabilities 8 7
Level 2 | 5.25% Senior Notes Due July 2030    
Disclosed at fair value:    
Long-term debt 501 505
Level 2 | Fair Value, Recurring | Interest Rate Contract    
Measured at fair value on a recurring basis:    
Interest rate derivative financial instrument assets 16 3
Level 3    
Disclosed at fair value:    
Long-term debt 5,684 5,567
Kloosterboer Preference Shares 304 279
Level 3 | Fair Value, Recurring    
Measured at fair value on a recurring basis:    
Acquisition related contingent consideration 5 14
Level 3 | Fair Value, Nonrecurring    
Measured at fair value on a non-recurring basis:    
Other investments (included in other assets) $ 27 $ 26