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Provisions (Narratives) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Mar. 31, 2021
Dec. 31, 2018
Suria And Sallent Sites, Spain [Member]      
Disclosure of other provisions [line items]      
Period used for estimating the cost of closure and restoration for the Salltent site 50 years    
Damage claims by owners relating to contamination in Suria and Sallent     $ 22
Provision relating owners' claims due to contamination in Suria and Sallent     $ 4
Rotem Amfert Israel [Member]      
Disclosure of other provisions [line items]      
Amount of provision for the closure and restoration for the Salltent site $ 89    
Bromine Israel [Member]      
Disclosure of other provisions [line items]      
Amount of provision for the closure and restoration for the Salltent site $ 43    
Percent of water drawing charges in concession area 65.00%    
Water drawing yearly charges outside the concession area   $ 3