Commitments and Contingencies - Summary of Contingent Liabilities and Credit Commitments (Details) - KZT (₸) ₸ in Millions	Dec. 31, 2025	Dec. 31, 2024
Disclosure of contingent liabilities [abstract]
Commitments on loans and unused credit lines: Revocable loans	₸ 370,278	₸ 293,401
Guarantees issued and similar commitments	326
Total contingent liabilities and credit commitments	₸ 370,604	₸ 293,401

The amount of the commitments on loans and unused credit lines: revocable loans.

No definition available.

Name:	kspi_CommitmentsOnLoansAndUnusedCreditLinesRevocableLoans
Namespace Prefix:	kspi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant