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Subsequent Event (Details)
£ in Millions, $ in Millions
Apr. 09, 2020
GBP (£)
Mar. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Subsequent Event      
Debt outstanding | $   $ 1,948 $ 1,848
Subsequent Event. | Forecast | PureCircle Limited      
Subsequent Event      
Purchase price | £ £ 185.3    
Subsequent Event. | Forecast | PureCircle Limited | PureCircle Limited      
Subsequent Event      
Ownership percentage 75.00%