v3.22.4
Interest expense and foreign exchange (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Interest expense      
Interest on long-term debt, excluding lease liabilities $ 25 $ 27 $ 28
Interest on lease liabilities 14 14 14
Amortization of financing fees and other 2 3 4
Total 41 44 46
Foreign exchange      
Derivatives used to manage currency risks 0 0 (1)
Foreign exchange gain (7) (1) (1)
Total $ (7) $ (1) $ (2)