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Financial risk management - Maturity analysis for financial assets held for managing liquidity risk (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2025	Dec. 31, 2024
Financial assets
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	₩ 848,175,296	₩ 797,103,840
Cash and due from banks at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	39,992,898	40,734,358
Due from banks at FVTPL
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	40,862	35,450
Loans at FVTPL
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	1,419,985	1,880,507
Loans at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	549,592,623	529,315,667
Securities at FVTPL
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	76,597,263	72,844,243
Securities at FVOCI
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	103,429,122	93,889,526
Securities at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	35,053,755	36,529,433
Other financial assets
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	42,048,788	21,874,656
Less than 1 month | Financial assets
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	220,765,377	180,871,423
Less than 1 month | Cash and due from banks at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	37,051,022	36,069,005
Less than 1 month | Loans at FVTPL
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	84,231	275,263
Less than 1 month | Loans at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	37,915,506	37,868,875
Less than 1 month | Securities at FVTPL
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	51,192,910	41,515,377
Less than 1 month | Securities at FVOCI
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	54,888,016	45,714,502
Less than 1 month | Securities at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	660,221	878,077
Less than 1 month | Other financial assets
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	38,973,471	18,550,324
1~3 months | Financial assets
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	62,581,244	61,224,975
1~3 months | Cash and due from banks at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	746,364	678,029
1~3 months | Loans at FVTPL
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	419,312	531,544
1~3 months | Loans at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	55,304,875	54,775,441
1~3 months | Securities at FVTPL
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	1,363,382	1,066,771
1~3 months | Securities at FVOCI
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	1,564,045	997,618
1~3 months | Securities at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	3,086,876	3,117,274
1~3 months | Other financial assets
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	96,390	58,298
3~6 months | Financial assets
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	69,709,316	74,152,048
3~6 months | Cash and due from banks at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	68,711	293,900
3~6 months | Loans at FVTPL
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	83	136,762
3~6 months | Loans at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	66,984,277	69,211,593
3~6 months | Securities at FVTPL
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	748,568	473,077
3~6 months | Securities at FVOCI
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	551,147	825,089
3~6 months | Securities at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	1,288,192	3,152,468
3~6 months | Other financial assets
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	68,338	59,159
6 months ~ 1 year | Financial assets
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	109,856,230	106,865,080
6 months ~ 1 year | Cash and due from banks at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	19,990	290,070
6 months ~ 1 year | Loans at FVTPL
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	81,094	95
6 months ~ 1 year | Loans at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	103,607,758	99,131,674
6 months ~ 1 year | Securities at FVTPL
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	1,297,385	894,621
6 months ~ 1 year | Securities at FVOCI
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	1,592,027	2,680,515
6 months ~ 1 year | Securities at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	2,902,604	3,236,438
6 months ~ 1 year | Other financial assets
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	355,372	631,667
1~5 years | Financial assets
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	194,812,093	186,849,560
1~5 years | Cash and due from banks at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	264,095	295,757
1~5 years | Loans at FVTPL
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	708,906	660,244
1~5 years | Loans at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	149,981,848	145,027,757
1~5 years | Securities at FVTPL
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	8,919,975	8,851,339
1~5 years | Securities at FVOCI
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	13,096,314	10,809,850
1~5 years | Securities at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	21,330,649	20,604,654
1~5 years | Other financial assets
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	510,306	599,959
More than 5 years | Financial assets
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	190,451,036	187,140,754
More than 5 years | Cash and due from banks at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	1,842,716	3,107,597
More than 5 years | Due from banks at FVTPL
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	40,862	35,450
More than 5 years | Loans at FVTPL
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	126,359	276,599
More than 5 years | Loans at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	135,798,359	123,300,327
More than 5 years | Securities at FVTPL
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	13,075,043	20,043,058
More than 5 years | Securities at FVOCI
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	31,737,573	32,861,952
More than 5 years | Securities at amortized cost
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	5,785,213	5,540,522
More than 5 years | Other financial assets
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Non-derivative financial assets, undiscounted cash flows	₩ 2,044,911	₩ 1,975,249

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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.

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- Definition

The amount of financial assets held for managing liquidity risk (for example, financial assets that are readily saleable or expected to generate cash inflows to meet cash outflows on financial liabilities). [Refer: Liquidity risk [member]; Financial assets; Financial liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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-IssueDate 2025-01-01
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