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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
Dec. 31, 2022
USD ($)
ExchangeRates
Dec. 31, 2021
USD ($)
ExchangeRates
Dec. 31, 2020
USD ($)
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]      
Trade and other payables $ 501.2 $ 480.5  
Foreign exchange derivative contracts   6.8  
Environmental rehabilitation costs 564.8 510.5  
Lease liabilities 512.2 547.1  
South Deep dividend 4.4 5.4  
Total 2,902.9 2,923.4  
Face amount of borrowings 1,200.0    
Environmental trust funds $ 98.8 $ 88.1 $ 79.3
Rand      
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]      
Closing exchange rate 17.02 15.94 14.69
South Africa and Ghana      
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]      
Environmental trust funds $ 98.8 $ 88.1  
Closing foreign exchange rate | Rand      
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]      
Closing exchange rate | ExchangeRates 17.02 15.94  
US dollar borrowings      
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]      
Capital $ 1,083.5 $ 1,083.5  
– Interest $ 236.8 $ 289.6  
US dollar borrowings | Liquidity Risk      
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]      
Borrowings adjustment to interest rate 4.39157% 0.1013%  
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  
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  
Within one year      
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]      
Trade and other payables $ 501.2 $ 480.5  
Foreign exchange derivative contracts   6.8  
Environmental rehabilitation costs 17.2 12.0  
Lease liabilities 84.8 82.0  
South Deep dividend 0.8 0.8  
Total 665.1 639.6  
Within one year | US dollar borrowings      
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]      
Capital 0.0 0.0  
– Interest 61.1 57.5  
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  
Foreign exchange derivative contracts   0.0  
Environmental rehabilitation costs 42.4 41.5  
Lease liabilities 232.3 216.4  
South Deep dividend 2.4 2.9  
Total 994.2 1,003.7  
Between one and five years | US dollar borrowings      
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]      
Capital 583.5 583.5  
– Interest 133.6 159.4  
After five years      
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]      
Trade and other payables 0.0 0.0  
Foreign exchange derivative contracts   0.0  
Environmental rehabilitation costs 505.2 457.0  
Lease liabilities 195.1 248.7  
South Deep dividend 1.2 1.7  
Total 1,243.6 1,280.1  
After five years | US dollar borrowings      
Disclosure of maturity analysis for derivative non-derivative financial liabilities [line items]      
Capital 500.0 500.0  
– Interest $ 42.1 $ 72.7