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Risk Management Activities - Schedule of Contractually Due Undiscounted Cash Flows Resulting from Maturities of All Financial Liabilities, Including Interest Payments (Detail)
$ in Millions
 12 Months Ended
May 09, 2019
Dec. 31, 2023
USD ($)
ExchangeRates
Dec. 31, 2022
USD ($)
ExchangeRates
Dec. 31, 2021
USD ($)
ExchangeRates
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]        
Trade and other payables   $ 532.4 $ 501.2  
Environmental rehabilitation costs   598.1 564.8  
Lease liabilities   549.0 512.2  
South Deep dividend   3.2 4.4  
Total   3,145.4 2,902.9  
Environmental trust funds   $ 109.6 $ 98.8 $ 88.1
Rand        
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]        
Closing exchange rate | ExchangeRates   18.30 17.02 15.94
South Africa and Ghana        
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]        
Environmental trust funds   $ 109.6 $ 98.8  
Closing foreign exchange rate | Rand        
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]        
Closing exchange rate | ExchangeRates   18.30 17.02  
US dollar borrowings        
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]        
Capital   $ 1,215.5 $ 1,083.5  
– Interest   $ 215.9 $ 236.8  
US dollar borrowings | Liquidity Risk        
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]        
Borrowings adjustment to interest rate   5.33% 4.392%  
US$500 million 5-year notes issue        
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]        
Face amount of borrowings   $ 500.0 $ 500.0  
Borrowings maturity, term 5 years 5 years 5 years  
US$500 million 10-year notes issue        
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]        
Face amount of borrowings   $ 500.0 $ 500.0  
Borrowings maturity, term 10 years 10 years 10 years  
Canada Dollar Borrowings        
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]        
Capital   $ 23.9    
– Interest   $ 7.4    
Canada Dollar Borrowings | Credit risk        
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]        
Borrowings adjustment to interest rate   5.455%    
Within one year        
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]        
Trade and other payables   $ 532.4 $ 501.2  
Environmental rehabilitation costs   47.5 17.2  
Lease liabilities   100.7 84.8  
South Deep dividend   0.7 0.8  
Total   1,317.5 665.1  
Within one year | US dollar borrowings        
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]        
Capital   583.5 0.0  
– Interest   51.0 61.1  
Within one year | Canada Dollar Borrowings        
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]        
Capital   0.0    
– Interest   1.7    
Between one and five years        
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]        
Trade and other payables   0.0 0.0  
Environmental rehabilitation costs   187.4 42.4  
Lease liabilities   245.3 232.3  
South Deep dividend   1.8 2.4  
Total   749.5 994.2  
Between one and five years | US dollar borrowings        
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]        
Capital   132.0 583.5  
– Interest   153.4 133.6  
Between one and five years | Canada Dollar Borrowings        
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]        
Capital   23.9    
– Interest   5.7    
After five years        
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]        
Trade and other payables   0.0 0.0  
Environmental rehabilitation costs   363.2 505.2  
Lease liabilities   203.0 195.1  
South Deep dividend   0.7 1.2  
Total   1,078.4 1,243.6  
After five years | US dollar borrowings        
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]        
Capital   500.0 500.0  
– Interest   11.5 $ 42.1  
After five years | Canada Dollar Borrowings        
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]        
Capital   0.0    
– Interest   $ 0.0