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Employee Benefits (Tables)
 12 Months Ended
Dec. 31, 2022
Text Block [abstract]  
Summary of employee benefits expense
     
2022
US$m
     
2021
US$m
     
2020
US$m
  
Employee benefits
   
 
415
 
   
 
217
 
   
 
252
 
Share-based payments
   
 
26
 
   
 
12
 
   
 
19
 
Defined contribution plan costs
   
 
41
 
   
 
26
 
   
 
27
 
Defined benefit plan expense
   
 
9
 
   
 
1
 
   
 
2
 
    
 
491
 
   
 
256
 
   
 
300
 
Summary of information about key management personnel compensation
Key management personnel (KMP) compensation for the financial year was as follows:
 
     
2022
US$
    
2021
US$
    
2020
US$
  
Short-term employee benefits
1
   
 
            5,730,340
 
  
 
6,626,354
 
  
 
5,868,476
 
Post-employment benefits
1
   
 
155,086
 
  
 
88,396
 
  
 
63,805
 
Share-based payments
2
   
 
3,114,043
 
  
 
5,697,529
 
  
 
7,201,653
 
Long-term employee benefits
   
 
4,300
 
  
 
717,223
 
  
 
515,585
 
Termination benefits
   
 
152,531
 
  
 
2,447,525
 
  
 
390,087
 
    
 
9,156,300
 
  
 
          15,577,027
 
  
 
      14,039,606
 
 
1.
The 2021 comparatives for short-term employee benefits and post-employment benefits have been restated to include the superannuation component of the 2021 EIS cash and other cash bonuses for three key management personnel, increasing the short-term employee benefits expense by 
$26,676 to $6,626,354
 
and the post-employee benefits expense by $10,881 to $
88,396.
 
2.
The 2021 comparative for share-based payments has been restated to include amortisation of the fair value of 2021 performance rights for two key management personnel, increasing the expense by $88,507 to $5,697,529.
Summary of number of awards and movements for all share plans
The number of awards and movements for all share plans are summarised as follows:
 
   
Number of performance awards
 
  
     
   
            Employee plans                
    
            Executive plans                
  
         
    
WEP
    
SWEP
    
STA
4
    
LTA
4
  
         
 Year ended 31 December 2022
                                
         
 Opening balance
  
 
5,649,783
 
  
 
-
 
  
 
994,436
 
  
 
2,379,220
 
         
 Granted during the year
1,2
,3
  
 
3,017,366
 
  
 
3,046,963
 
  
 
495,800
 
  
 
764,171
 
         
 Vested during the year
  
 
(1,498,065
)
 
  
 
(38,146
)
 
  
 
(450,609
)
 
  
 
(191,736
)
 
         
 Forfeited during the year
  
 
(539,403
)
 
  
 
(124,741
)
 
  
 
(46,430
)
 
  
 
(397,233
)
 
         
 Awards at 31 December 2022
  
 
6,629,681
 
  
 
2,884,076
 
  
 
993,197
 
  
 
2,554,422
 
         
   
 
US$m
 
  
 
US$m
 
  
 
US$m
 
  
 
US$m
 
         
 Fair value of awards granted during the year
  
 
49
 
  
 
60
 
  
 
9
 
  
 
13
 
 
   
Number of performance awards
 
  
     
   
         Employee plans                
     
            Executive plans                
  
         
    
WEP
    
SWEP
     
STA
4
    
LTA
4
  
         
 
Year ended 31 December 2021
                                 
         
 Opening balance
  
 
5,618,603
 
  
 
-
 
   
 
975,295
 
  
 
      2,798,305
 
         
 Granted during the year
1,2,3
 
 
      2,507,167
 
  
 
-
 
   
 
353,412
 
  
 
553,849
 
         
 Vested during the year
  
 
(1,999,676
) 
  
 
-
 
   
 
        (307,402
) 
  
 
(322,746
) 
         
 Forfeited during the year
  
 
(476,311
) 
  
 
-
 
   
 
(26,869)
 
  
 
(650,188
) 
         
 Awards at 31 December 2021
  
 
5,649,783
 
  
 
-
 
   
 
994,436
 
  
 
2,379,220
 
         
   
 
US$m
 
  
 
              US$m
 
   
 
US$m
 
  
 
US$m
 
         
 Fair value of awards granted during the year
  
 
39
 
  
 
-
 
   
 
7
 
  
 
9
 
 
1.
For the purpose of valuation, the share price on grant date for the 2022 WEP allocations was $16.30 (2021: $15.17).
2.
For the purpose of valuation, the share price on grant date for the 2022 SWEP allocations was $19.74
 
(202
1
: nil).
3.
For the purpose of valuation, the share price on grant date for Restricted Shares was $19.20 and $19.27 (2021: $20.18) and Performance Rights was $13.08 and $13.71 (2021: $11.66 and $14.44).
4.
Includes awards issued under EIP and EIS.