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Customer Accounts - Additional Information (Details) - KZT (₸) ₸ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Customer accounts | ₸ 6,561,950 | ₸ 5,441,456
Accrued interest included in term deposits of customer accounts | 51,212 | 44,044
Customer accounts held as prepayments on loans to customers | ₸ 83,654 | ₸ 60,260
KZT |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Percentage of customer accounts predominately denominated | 91.00% | 91.00%
Top Twenty Customers |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Customer accounts | ₸ 76,413 | ₸ 97,806
Percentage of customer accounts due to customers | 1.16% | 1.80%

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- Definition The amount of deposit liabilities from customers held by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_DepositsFromCustomers
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- 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
Name: | ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Accrued interest included in term deposits of customer accounts. + References No definition available. + Details
Name: | kspi_AccruedInterestIncludedInTermDepositsOfCustomerAccounts
Namespace Prefix: | kspi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Customer accounts held as prepayments on loans to customers. + References No definition available. + Details
Name: | kspi_CustomerAccountsHeldAsPrepaymentsOnLoansToCustomers
Namespace Prefix: | kspi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Percentage of customer accounts due to customers. + References No definition available. + Details
Name: | kspi_PercentageOfCustomerAccountsDueToCustomers
Namespace Prefix: | kspi_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of customer accounts predominately denominated. + References No definition available. + Details
Name: | kspi_PercentageOfCustomerAccountsPredominatelyDenominated
Namespace Prefix: | kspi_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_CurrencyAxis=currency_KZT
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_MajorCustomersAxis=kspi_TopTwentyCustomersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |