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Leases - Summary of gross investment and present value of minimum lease payment of finance lease (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2025 | Dec. 31, 2024
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Gross investment and present value of minimum lease payment of finance lease [Line Items] |  |
Gross investment | ₩ 2,402,502 | ₩ 2,283,180
Unrealized interest income | 259,498 | 251,717
Present value of minimum lease payment | 2,143,004 | 2,031,463
Less than 1 year [member] |  |
Gross investment and present value of minimum lease payment of finance lease [Line Items] |  |
Gross investment | 718,515 | 655,270
Unrealized interest income | 119,989 | 116,496
Present value of minimum lease payment | 598,526 | 538,774
1~2 years [member] |  |
Gross investment and present value of minimum lease payment of finance lease [Line Items] |  |
Gross investment | 641,935 | 580,993
Unrealized interest income | 73,116 | 75,359
Present value of minimum lease payment | 568,819 | 505,634
2~3 years [member] |  |
Gross investment and present value of minimum lease payment of finance lease [Line Items] |  |
Gross investment | 442,923 | 520,285
Unrealized interest income | 40,645 | 36,203
Present value of minimum lease payment | 402,278 | 484,082
3~4 years [member] |  |
Gross investment and present value of minimum lease payment of finance lease [Line Items] |  |
Gross investment | 351,421 | 305,670
Unrealized interest income | 16,236 | 13,301
Present value of minimum lease payment | 335,185 | 292,369
4~5 years [member] |  |
Gross investment and present value of minimum lease payment of finance lease [Line Items] |  |
Gross investment | 243,782 | 217,104
Unrealized interest income | 9,503 | 10,347
Present value of minimum lease payment | 234,279 | 206,757
Later than 5 years [member] |  |
Gross investment and present value of minimum lease payment of finance lease [Line Items] |  |
Gross investment | 3,926 | 3,858
Unrealized interest income | 9 | 11
Present value of minimum lease payment | ₩ 3,917 | ₩ 3,847

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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
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- Definition The gross investment in the finance lease discounted at the interest rate implicit in the lease. Finance lease is a lease that transfers substantially all the risks and rewards incidental to ownership of an underlying asset. Gross investment in the finance lease is the sum of: (a) the lease payments receivable by a lessor under a finance lease; and (b) any unguaranteed residual value accruing to the lessor. Interest rate implicit in the lease is the rate of interest that causes the present value of (a) the lease payments and (b) the unguaranteed residual value to equal to the sum of (i) the fair value of the underlying asset and (ii) the initial direct costs of the lessor. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2025-01-01 -Paragraph 94 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2025-en-r&anchor=para_94&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 122 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_122_b&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 122 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_122_b&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The amount of undiscounted finance lease payments to be received. Finance lease is a lease that transfers substantially all the risks and rewards incidental to ownership of an underlying asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2025-01-01 -Paragraph 94 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2025-en-r&anchor=para_94&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 122 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_122_a&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 122 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_122_a&doctype=Standard -URIDate 2025-03-27 + Details
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