XML 108 R101.htm IDEA: XBRL DOCUMENT v3.24.0.1
Financial risk management - Hedging activities (Details)
$ in Thousands
Dec. 31, 2023
USD ($)
$ / £
Jun. 30, 2023
USD ($)
$ / £
Dec. 31, 2022
USD ($)
$ / £
Financial risk management activities      
Closing exchange rate | $ / £ 1.2746 1.2716 1.2040
US dollar      
Financial risk management activities      
Net debt $ 616,800 $ 592,500 $ 641,100
Hedged future USD revenues (253,600) (52,000) (50,780)
Unhedged USD borrowings 363,200 540,500 590,320
Borrowings | US dollar      
Financial risk management activities      
Net debt 650,000 650,000 650,000
Cash and cash equivalents | US dollar      
Financial risk management activities      
Net debt $ (33,200) $ (57,500) $ (8,900)