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Major Group Investments - Direct and Indirect - Schedule of Major Group Investments - Direct and Indirect (Parenthetical) (Detail) R in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) shares | Dec. 31, 2020 ZAR (R) | Dec. 31, 2019 USD ($) shares | Dec. 31, 2018 USD ($)
Disclosure of subsidiaries [line items] |  |  |  |
Dividends paid to non-controlling interests | $ | $ 7.6 |  | $ 2.2 | $ 9.8
Accumulated non-controlling interest | $ | 163.7 |  | 131.7 |
Abosso Goldfields Limited [member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Accumulated non-controlling interest | $ | 12.0 |  | 7.9 |
Dividends paid to non-controlling interests | $ | $ 4.5 |  | $ 0.0 |
Abosso Goldfields Limited [member] | Class a shares [member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Shares held | 49,734,000 |  | 49,734,000 |
Abosso Goldfields Limited [member] | Class B Shares [member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Shares held | 4,266,000 |  | 4,266,000 |
Gold Fields Ghana Limited [member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Dividends paid to non-controlling interests | $ | $ 5.1 |  | $ 2.0 |
Accumulated non-controlling interest | $ | $ 142.7 |  | $ 125.5 |
Shares held | 900 |  | 900 |
Gold Fields La Cima SA [member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Dividends paid to non-controlling interests | $ | $ 0.5 |  | $ 0.2 |
Accumulated non-controlling interest | $ | $ 1.9 |  | $ 2.1 |
Shares held | 1,426,050,205 |  | 1,426,050,205 |
Newshelf 899 (Pty) Ltd [member] | Class a shares [member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Newshelf ownership percentage | 90.00% | 90.00% |  |
Shares held | 90,000,000 |  | 90,000,000 |
Newshelf 899 (Pty) Ltd [member] | Class B Shares [member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
BEE partners' stake | 10.00% | 10.00% |  |
Shares held | 10,000,000 |  | 10,000,000 |
Newshelf 899 (Pty) Ltd [member] | Class B Shares [member] | Not Later Than Ten Years [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Phase-in participation term | 10 years | 10 years |  |
cumulative preferential dividend | R |  | R 20.0 |  |
Phase in participation term expiration date | 2020-12 | 2020-12 |  |
Suspension Lifted Period To Participate In The Profits Phase In Basis Term | 10 years | 10 years |  |
Description of shares lifted from suspension over the period | after 10 years, in respect of one-third of the “B” shares | after 10 years, in respect of one-third of the “B” shares |  |
Newshelf 899 (Pty) Ltd [member] | Class B Shares [member] | Later Than Ten Years and Not Later Fifeteen Years [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Phase-in participation term | 5 years | 5 years |  |
cumulative preferential dividend | R |  | R 13.3 |  |
Suspension Lifted Period To Participate In The Profits Phase In Basis Term | 15 years | 15 years |  |
Description of shares lifted from suspension over the period | after 15 years, in respect of another one-third of the “B” shares | after 15 years, in respect of another one-third of the “B” shares |  |
Newshelf 899 (Pty) Ltd [member] | Class B Shares [member] | Later Than Fifeteen Years and Not Later Twenty Years [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Phase-in participation term | 5 years | 5 years |  |
cumulative preferential dividend | R |  | R 6.7 |  |
Suspension Lifted Period To Participate In The Profits Phase In Basis Term | 20 years | 20 years |  |
Description of shares lifted from suspension over the period | after 20 years, in respect of the remaining one-third of the “B” shares | after 20 years, in respect of the remaining one-third of the “B” shares |  |
Gold Fields Operations Limited [member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Shares held | 156,279,947 |  | 156,279,947 |
Gold Fields Operations Limited [member] | Class a shares [member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Shares held | 90,000,000 |  |  |
South Deep BEE [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Preferential Dividend Going To Cease Period | 20 years | 20 years |  |
South Deep BEE [Member] | Class B Shares [member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Shares held | 10,000,000 |  |  |
Ownership Retention Term | 30 years | 30 years |  |

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