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Commitments And Contingencies (Narrative) (Details) R in Millions, $ in Millions | Dec. 31, 2023 USD ($) | Dec. 31, 2023 ZAR (R)
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Nedbank [Member] | Guarantee [Member] |  |
Guarantor Obligations [Line Items] |  |
Guarantee amount | $ 0.1 | R 2.1
Nedbank [Member] | Guarantee [Member] | Minimum [Member] |  |
Guarantor Obligations [Line Items] |  |
Commission charge rate | 0.47% | 0.47%
Nedbank [Member] | Guarantee [Member] | Maximum [Member] |  |
Guarantor Obligations [Line Items] |  |
Guarantee amount | $ 1.9 | R 35.2
Commission charge rate | 1.84% | 1.84%
Nedbank [Member] | Ceded And Pledged Bank Accounts As Security [Member] |  |
Guarantor Obligations [Line Items] |  |
Guarantee amount | $ 0.1 | R 2.1
RMB Member [Member] | Guarantee [Member] |  |
Guarantor Obligations [Line Items] |  |
Guarantee amount | $ 1.8 | R 33.1
RMB Member [Member] | Guarantee [Member] | Minimum [Member] |  |
Guarantor Obligations [Line Items] |  |
Commission charge rate | 3.42% | 3.42%
RMB Member [Member] | Guarantee [Member] | Maximum [Member] |  |
Guarantor Obligations [Line Items] |  |
Commission charge rate | 3.44% | 3.44%

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