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Mining and Income Taxation - Summary of Components of Mining and Income Tax (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of Components of Mining and Income Tax [Line Items] |  |  |
- dividend withholding tax | $ (5.9) | $ (2.9) | $ (15.5)
Total mining and income taxation | (432.5) | (175.6) | 65.9
Major items causing the Group's income taxation to differ from the maximum South African statutory mining tax rate of 34.0% (2019: 34.0% and 2018: 34.0%) were: |  |  |
Taxation on profit before taxation at maximum South African statutory mining tax rate | (400.5) | (119.1) | 139.6
Rate adjustment to reflect the actual realised company tax rates in South Africa and offshore | 45.6 | 17.9 | (6.7)
Non-deductible share-based payments | (4.9) | (7.0) | (12.8)
Non-deductible exploration expense | (0.4) | (17.0) | (22.1)
Deferred tax assets not recognised on impairment and reversal of impairment of investments | 21.2 | (3.3) | (12.5)
Impairment of South Deep goodwill | 0.0 | 0.0 | (24.4)
Non-deductible interest paid | (31.2) | (29.9) | (25.5)
Share of results of equity-accounted investees, net of taxation | (0.9) | 1.1 | (4.5)
Non-taxable gain on acquisition of Asanko | 0.0 | 0.0 | 17.6
Non-taxable fair value gain on Maverix warrants | 0.4 | 1.4 | 1.3
Non-taxable profit on disposal of Maverix (2018: dilution of Gold Fields' interest in Maverix) | 0.0 | 5.0 | 1.4
Net non-deductible expenditure and non-taxable income | (0.7) | (10.5) | (7.6)
Deferred tax on unremitted earnings at Tarkwa and Cerro Corona (2018: Tarkwa and Cerro Corona and 2017: Tarkwa) | 1.3 | (4.5) | (1.1)
Deferred taxation movement on Peruvian Nuevo Sol devaluation against US Dollar | (7.5) | 0.1 | (1.2)
Various Peruvian non-deductible expenses | (5.8) | (6.6) | (7.5)
Deferred tax assets recognised at Salares Norte | 12.8 | 0.0 | 0.0
Additional capital allowances recognised at South Deep | 0.0 | 0.0 | 69.8
Deferred tax charge on change of tax rate at South Deep | 0.0 | 0.0 | (10.9)
Prior year adjustments | (0.2) | (1.0) | (3.0)
Other | (4.8) | 4.0 | (0.1)
Total mining and income taxation | (432.5) | (175.6) | 65.9
Cerro Cerona [member] |  |  |
Major items causing the Group's income taxation to differ from the maximum South African statutory mining tax rate of 34.0% (2019: 34.0% and 2018: 34.0%) were: |  |  |
Deferred tax assets not recognised | (0.1) | (3.3) | (14.9)
Damang and tarkwa [member] |  |  |
Major items causing the Group's income taxation to differ from the maximum South African statutory mining tax rate of 34.0% (2019: 34.0% and 2018: 34.0%) were: |  |  |
Deferred tax assets not recognised | (50.9) | 0.0 | 6.5
South African - Components of Mining and Income Tax [Member] |  |  |
Disclosure of Components of Mining and Income Tax [Line Items] |  |  |
- Company and capital gains taxation | (4.5) | (2.9) | (1.1)
- prior year adjustment - current taxation | (0.5) | 0.2 | 0.7
- deferred taxation | (25.8) | (0.3) | 208.5
Foreign Taxation - Components of Mining and Income Tax [Member] |  |  |
Disclosure of Components of Mining and Income Tax [Line Items] |  |  |
- prior year adjustment - current taxation | (0.1) | (1.1) | (3.7)
- deferred taxation | (40.2) | 15.3 | 3.1
- current taxation | (356.2) | (184.1) | (127.9)
- dividend withholding tax | $ (5.2) | $ (2.7) | $ (13.7)

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