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 [domain]]

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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 [domain]; Defined benefit obligation, at present value; Actuarial assumptions [domain]]

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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 [domain]; Defined benefit obligation, at present value; Actuarial assumptions [domain]]

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- Definition

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 [domain]]

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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2025-01-01
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Post-retirement benefit obligations - Actuarial Assumptions (Details)	1 Months Ended
	Jun. 30, 2026	Apr. 30, 2026	Mar. 31, 2026	Jun. 30, 2025	Apr. 30, 2025	Mar. 31, 2025
South Africa
Post-retirement benefit obligations
Healthcare cost inflation	6.00%			7.50%
Pension increase assumption			4.20%			6.00%
Average salary increases			4.00%			5.50%
South Africa \| Healthcare
Post-retirement benefit obligations
Discount rate	9.40%			12.00%
Weighted average duration of the obligation	12 years 6 months			12 years 6 months
South Africa \| Pension
Post-retirement benefit obligations
Discount rate			8.80%			10.80%
Weighted average duration of the obligation			10 years			10 years 3 months
United States of America
Post-retirement benefit obligations
Average salary increases	4.20%			4.20%
United States of America \| Healthcare
Post-retirement benefit obligations
Discount rate	5.60%			5.30%
Weighted average duration of the obligation	11 years			9 years
United States of America \| Pension
Post-retirement benefit obligations
Discount rate	5.40%			5.30%
Weighted average duration of the obligation	8 years			8 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		4.30%			3.90%
Weighted average duration of the obligation		13 years			14 years