The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]]

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The expected rate of increases in pension that is used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [member]; Defined benefit obligation, at present value; Actuarial assumptions [member]]

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The expected rate of salary increases used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [member]; Defined benefit obligation, at present value; Actuarial assumptions [member]]

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Medical cost trend rate used as significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]]

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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The weighted average duration of a defined benefit obligation. [Refer: Weighted average [member]]

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-Name IAS
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-IssueDate 2023-01-01
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Post-retirement benefit obligations - Actuarial Assumptions (Details)	Jun. 30, 2024	Apr. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Apr. 30, 2023	Mar. 31, 2023
South Africa
Post-retirement benefit obligations
Healthcare cost inflation			7.50%			7.50%
Pension increase assumption			5.90%			5.80%
Average salary increases			5.50%			5.50%
South Africa \| Pension
Post-retirement benefit obligations
Discount rate			12.40%			12.90%
Weighted average duration of the obligation			10 years			11 years
South Africa \| Healthcare
Post-retirement benefit obligations
Discount rate			12.60%			13.00%
Weighted average duration of the obligation			12 years			13 years
United States of America
Post-retirement benefit obligations
Average salary increases	4.20%			4.20%
United States of America \| Pension
Post-retirement benefit obligations
Discount rate	5.20%			4.90%
Weighted average duration of the obligation	6 years			4 years
United States of America \| Healthcare
Post-retirement benefit obligations
Discount rate	5.30%			4.90%
Weighted average duration of the obligation	9 years			10 years
Europe
Post-retirement benefit obligations
Pension increase assumption		2.20%			2.20%
Average salary increases		3.20%			3.20%
Europe \| Pension
Post-retirement benefit obligations
Discount rate		3.70%			3.70%
Weighted average duration of the obligation		14 years			15 years