v3.26.3
Borrowings - Disclosure of Facilities' Terms Schedule (Details)
R in Millions, $ in Millions, $ in Billions
 1 Months Ended
Jun. 30, 2026
ZAR (R)
May 30, 2025
USD ($)
Feb. 28, 2023
USD ($)
May 30, 2022
ZAR (R)
Jun. 25, 2026
ZAR (R)
Jun. 25, 2026
USD ($)
Jun. 25, 2026
AUD ($)
May 30, 2022
USD ($)
R2.5 Billion Facility - Sustainability Linked                
Disclosure of detailed information about borrowings [line items]                
Maximum borrowing capacity | R       R 2,500        
Term of facility       Five years        
R2.5 Billion Facility - Sustainability Linked | JIBAR                
Disclosure of detailed information about borrowings [line items]                
Interest charge (as a percent)       2.40%       2.40%
US$400 million facility - Sustainability Linked                
Disclosure of detailed information about borrowings [line items]                
Maximum borrowing capacity               $ 400
Term of facility       Five years        
R1.5 billion facility - Green Term Loan                
Disclosure of detailed information about borrowings [line items]                
Maximum borrowing capacity | R       R 1,500        
Term of facility       Six years, six months        
R1.5 billion facility - Green Term Loan | JIBAR                
Disclosure of detailed information about borrowings [line items]                
Interest charge (as a percent)       2.65%       2.65%
US1.25 billion facility - Bridge Facility                
Disclosure of detailed information about borrowings [line items]                
Maximum borrowing capacity   $ 1,250            
Term of facility   One year, six months            
Loan origination fees related to the bridge facility capitalized | R R 230              
Senior Syndicated Facility                
Disclosure of detailed information about borrowings [line items]                
Term of facility     Five years          
US500 million RCF                
Disclosure of detailed information about borrowings [line items]                
Maximum borrowing capacity           $ 500    
Term of facility Three years              
AUD500 million facility                
Disclosure of detailed information about borrowings [line items]                
Maximum borrowing capacity             $ 0.5  
Term of facility Three years              
R4 billion RCF                
Disclosure of detailed information about borrowings [line items]                
Maximum borrowing capacity | R         R 4,000      
Term of facility Three years              
R3 billion Green Term Loan                
Disclosure of detailed information about borrowings [line items]                
Maximum borrowing capacity | R         R 3,000      
Term of facility Six years, six months              
Term loan | US$400 million facility - Sustainability Linked                
Disclosure of detailed information about borrowings [line items]                
Maximum borrowing capacity               $ 100
Term loan | US$400 million facility - Sustainability Linked | Secured Overnight Financing Rate (SOFR)                
Disclosure of detailed information about borrowings [line items]                
Interest charge (as a percent)       2.85%       2.85%
Term loan | US1.25 billion facility - Bridge Facility | Secured Overnight Financing Rate (SOFR) | Due between 0 to six months (c)                
Disclosure of detailed information about borrowings [line items]                
Interest charge (as a percent)   2.00%            
Term loan | US1.25 billion facility - Bridge Facility | Secured Overnight Financing Rate (SOFR) | Next six months                
Disclosure of detailed information about borrowings [line items]                
Interest charge (as a percent)   2.80%            
Term loan | US1.25 billion facility - Bridge Facility | Secured Overnight Financing Rate (SOFR) | Last six months                
Disclosure of detailed information about borrowings [line items]                
Interest charge (as a percent)   4.00%            
Term loan | Senior Syndicated Facility                
Disclosure of detailed information about borrowings [line items]                
Maximum borrowing capacity     $ 205          
Term loan | Senior Syndicated Facility | Secured Overnight Financing Rate (SOFR) | Floor                
Disclosure of detailed information about borrowings [line items]                
Interest charge (as a percent)     2.50%          
Term loan | Senior Syndicated Facility | Secured Overnight Financing Rate (SOFR) | Cap                
Disclosure of detailed information about borrowings [line items]                
Interest charge (as a percent)     3.00%          
Term loan | AUD500 million facility | Bank Bill Swap Rate (BBSY)                
Disclosure of detailed information about borrowings [line items]                
Interest charge (as a percent)         2.50% 2.50% 2.50%  
Term loan | R3 billion Green Term Loan | South African Rand Overnight Index Average (ZARONIA)                
Disclosure of detailed information about borrowings [line items]                
Interest charge (as a percent)         2.20% 2.20% 2.20%  
Revolving credit facility | US$400 million facility - Sustainability Linked                
Disclosure of detailed information about borrowings [line items]                
Maximum borrowing capacity               $ 300
Revolving credit facility | US$400 million facility - Sustainability Linked | Secured Overnight Financing Rate (SOFR)                
Disclosure of detailed information about borrowings [line items]                
Interest charge (as a percent)       2.70%       2.70%
Revolving credit facility | Senior Syndicated Facility                
Disclosure of detailed information about borrowings [line items]                
Maximum borrowing capacity     $ 125          
Revolving credit facility | Senior Syndicated Facility | Secured Overnight Financing Rate (SOFR) | Floor                
Disclosure of detailed information about borrowings [line items]                
Interest charge (as a percent)     2.50%          
Revolving credit facility | Senior Syndicated Facility | Secured Overnight Financing Rate (SOFR) | Cap                
Disclosure of detailed information about borrowings [line items]                
Interest charge (as a percent)     3.00%          
Revolving credit facility | US500 million RCF | Secured Overnight Financing Rate (SOFR)                
Disclosure of detailed information about borrowings [line items]                
Interest charge (as a percent)         2.20% 2.20% 2.20%  
Revolving credit facility | AUD500 million facility | Bank Bill Swap Rate (BBSY)                
Disclosure of detailed information about borrowings [line items]                
Interest charge (as a percent)         2.20% 2.20% 2.20%  
Revolving credit facility | R4 billion RCF | South African Rand Overnight Index Average (ZARONIA)                
Disclosure of detailed information about borrowings [line items]                
Interest charge (as a percent)         2.00% 2.00% 2.00%