XML 225 R157.htm IDEA: XBRL DOCUMENT v3.19.3
Retirement Benefit Obligation - Disclosure of Net Liability of Defined Benefit Plan (Details) - ZAR (R)
R in Millions
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Disclosure of net defined benefit liability (asset) [line items]      
Net liability of defined benefit plan R 201 R 186  
Present value of defined benefit obligation      
Disclosure of net defined benefit liability (asset) [line items]      
Net liability of defined benefit plan 201 186 R 179
Fair value of plan assets      
Disclosure of net defined benefit liability (asset) [line items]      
Net liability of defined benefit plan R 0 R 0