Share-based payments - Equity settled, 2020 Plans (Details)	12 Months Ended
Dec. 31, 2025 performanceCriteria peerGroupCompany tranche
Share-based payments
TSR Weighting percentage	50.00%
ROCE Weighting percentage	30.00%
Maximum
Share-based payments
ROCE Weighting percentage	250.00%
Sibanye 2020 share plan
Share-based payments
TSR Weighting percentage	70.00%
Number of peer-group companies \| peerGroupCompany	8
ROCE Weighting percentage	30.00%
ROCE incremental increase (as a percent)	6.00%
Sibanye 2020 share plan \| 0%
Share-based payments
Vesting percentage	0.00%
Sibanye 2020 share plan \| 10%
Share-based payments
Vesting percentage	0.00%
Sibanye 2020 share plan \| 20%
Share-based payments
Vesting percentage	0.00%
Sibanye 2020 share plan \| 30%
Share-based payments
Vesting percentage	5.00%
Sibanye 2020 share plan \| 40%
Share-based payments
Vesting percentage	20.00%
Sibanye 2020 share plan \| 50%
Share-based payments
Vesting percentage	35.00%
Sibanye 2020 share plan \| 60%
Share-based payments
Vesting percentage	55.00%
Sibanye 2020 share plan \| 70%
Share-based payments
Vesting percentage	75.00%
Sibanye 2020 share plan \| 80%
Share-based payments
Vesting percentage	90.00%
Sibanye 2020 share plan \| 90%
Share-based payments
Vesting percentage	100.00%
Sibanye 2020 share plan \| 100%
Share-based payments
Vesting percentage	100.00%
Sibanye 2020 share plan \| ≤Ke
Share-based payments
Vesting percentage	0.00%
Sibanye 2020 share plan \| Ke + 1%
Share-based payments
Vesting percentage	16.70%
Sibanye 2020 share plan \| Ke + 2%
Share-based payments
Vesting percentage	33.30%
Sibanye 2020 share plan \| Ke + 3%
Share-based payments
Vesting percentage	50.00%
Sibanye 2020 share plan \| Ke + 4%
Share-based payments
Vesting percentage	66.70%
Sibanye 2020 share plan \| Ke + 5%
Share-based payments
Vesting percentage	83.30%
Sibanye 2020 share plan \| Ke + 6%
Share-based payments
Vesting percentage	100.00%
Sibanye 2020 share plan \| ROCE Ke
Share-based payments
ROCE Weighting percentage	30.00%
Vesting percentage	0.00%
Sibanye 2020 share plan \| ROCE Ke \| Maximum
Share-based payments
Vesting percentage	100.00%
Sibanye 2020 share plan - FSU
Share-based payments
Number of tranches \| tranche	2
Sibanye 2020 share plan - FSU \| First tranche
Share-based payments
Vesting life of part one of share-based awards	9 months
Sibanye 2020 share plan - FSU \| Second tranche
Share-based payments
Vesting life of part one of share-based awards	18 months
Sibanye 2020 share plan - FSU \| United States Employees
Share-based payments
Number of days for VWAP of listed shares	3 days
Sibanye 2020 share plan - FSU \| South African Participants
Share-based payments
Number of days for VWAP of listed shares	3 days
Sibanye 2020 share plan - FSU \| Participants in Other Juridictions
Share-based payments
Number of trading days preceding the award date before applying VWAP	3 days
Sibanye 2020 share plan - CSU
Share-based payments
Performance period	3 years
Number of performance criteria \| performanceCriteria	2
Forfeiture percentage	20.00%
Sibanye 2020 share plan - CSU \| South African Participants
Share-based payments
Number of days for VWAP of listed shares	3 days
Sibanye 2020 share plan - CSU \| Participants in Other Juridictions
Share-based payments
Number of trading days preceding the award date before applying VWAP	3 days

- Definition

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.

+ References

No definition available.

+ Details

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- Definition

The percentage incremental increase on the return on capital employed (ROCE).

+ References

No definition available.

+ Details

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Namespace Prefix:	sbsw_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Days For Volume Weighted Average Price (VWAP) Of Share Listed

+ References

No definition available.

+ Details

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Namespace Prefix:	sbsw_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of peer-group companies.

+ References

No definition available.

+ Details

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Namespace Prefix:	sbsw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of performance criteria.

+ References

No definition available.

+ Details

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Namespace Prefix:	sbsw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number Of Trading Days Preceding The Award Date Before Applying The Relevant VWAP

+ References

No definition available.

+ Details

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Namespace Prefix:	sbsw_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of Tranches

+ References

No definition available.

+ Details

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Namespace Prefix:	sbsw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of maximum forfeiture at boards sole discretion, if it determines that there is evidence of extreme environmental, social and governance (ESG) malpractice during the Vesting Period.

+ References

No definition available.

+ Details

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Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Return on capital employed weighting percentage for allocation of share based awards.

+ References

No definition available.

+ Details

Name:	sbsw_PercentageOfReturnOnCapitalEmployedWeighting
Namespace Prefix:	sbsw_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Total shareholder return weighting percentage for allocation of share based awards.

+ References

No definition available.

+ Details

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Namespace Prefix:	sbsw_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Performance period of share-based awards.

+ References

No definition available.

+ Details

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Namespace Prefix:	sbsw_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Vesting period of first part of share award.

+ References

No definition available.

+ Details

Name:	sbsw_ShareBasedPaymentArrangementsVestingPeriod
Namespace Prefix:	sbsw_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Vesting percentage of share-based awards.

+ References

No definition available.

+ Details

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Namespace Prefix:	sbsw_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant