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Cash and Cash Equivalents (Tables)
 12 Months Ended
Dec. 31, 2022
Text Block [abstract]  
Summary of Information about Cash and cash equivalents
   
2022
             US$m
    
2021
              US$m
  
 
  
Cash and cash equivalents
                
Cash at bank
  
 
1,222
 
  
 
300
 
Term deposits
  
 
4,967
 
  
 
2,725
 
Restricted cash
  
 
12
 
  
 
-
 
 
  
Total cash and cash equivalents
  
 
6,201
 
  
 
3,025
 
 
  
Summary of Group's cash and cash equivalents by currency
 
Recognition and measurement
 
Cash and cash equivalents in the
consolidated
statement of financial position comprise cash at bank and short-term deposits with an original maturity of three months or less. Cash and cash equivalents are stated at face value in the
consolidated
 
statement of financial position. Cash and cash equivalents include $12 million (2021: nil) restricted by legal or contractual arrangements.
 
Foreign exchange risk
 
The following table summarises the Group’s cash and cash equivalents by currency.
   
2022
             US$m
    
2021
            US$m
  
 
  
US dollar
  
 
5,886
 
  
 
2,917
 
Australian dollar
  
 
182
 
  
 
63
 
Other
  
 
133
 
  
 
45
 
 
  
Total cash and cash equivalents
  
 
6,201
 
  
 
3,025