Borrowings (Narrative) (Details) $ in Thousands, R in Millions	Mar. 31, 2021 USD ($)	Mar. 31, 2021 ZAR (R)	Nov. 02, 2020 ZAR (R)	Nov. 01, 2020 ZAR (R)	Jun. 30, 2020 USD ($)	Jun. 30, 2020 ZAR (R)
Short-term Debt [Line Items]
Short-term facility available	$ 111,887
Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Short-term facility available	97,789
Overdraft Facility [Member]
Short-term Debt [Line Items]
Short-term facility available	3,372
Indirect And Derivative Facilities [Member]
Short-term Debt [Line Items]
Short-term facility available	10,726
Nedbank Limited [Member] | Overdraft Facility [Member]
Short-term Debt [Line Items]
Short-term facility available	20,200	R 300.0
Nedbank Limited [Member] | Overdraft Facility [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Short-term facility available	16,900	250.0
Nedbank Limited [Member] | Overdraft Facility [Member] | General Banking Facility [Member]
Short-term Debt [Line Items]
Short-term facility available	3,400	50.0
Nedbank Limited [Member] | Indirect And Derivative Facilities [Member]
Short-term Debt [Line Items]
Short-term facility available	10,700	159.0
Nedbank Limited [Member] | South Africa [Member]
Short-term Debt [Line Items]
Aggregate amount of short-term borrowing	31,000	459.0
Nedbank Limited [Member] | South Africa [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Short-term facility available	16,860
Aggregate amount of short-term borrowing	7,600	R 113.0
Nedbank Limited [Member] | South Africa [Member] | Overdraft Facility [Member]
Short-term Debt [Line Items]
Short-term facility available	3,372
Nedbank Limited [Member] | South Africa [Member] | Overdraft Facility [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Short-term facility available	30,958
Nedbank Limited [Member] | South Africa [Member] | Indirect And Derivative Facilities [Member]
Short-term Debt [Line Items]
Short-term facility available	$ 10,726		R 159.0	R 150.0	$ 150,000	R 159.0