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Non-Controlling Interest (Details) - Schedule of Financial Information of the Subsidiaries Included in the Consolidation of the Bank that Possess Non-Controlling Interests - CLP ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Schedule of Financial Information of the Subsidiaries Included in the Consolidation of the Bank that Possess Non-Controlling Interests [Line Items] |  |  |
Assets | $ 1,207,129 | $ 1,372,684 | $ 1,588,588
Liabilities | 974,720 | 1,138,470 | 1,264,340
Capital | 208,829 | 199,121 | 284,938
Net income | 23,580 | 35,093 | 39,310
Santander Corredora de Seguros Limitada |  |  |
Schedule of Financial Information of the Subsidiaries Included in the Consolidation of the Bank that Possess Non-Controlling Interests [Line Items] |  |  |
Assets | 32,876 | 31,758 | 92,541
Liabilities | 12,878 | 13,895 | 13,093
Capital | 17,861 | 9,576 | 71,121
Net income | 2,137 | 8,287 | 8,327
Santander Corredores de Bolsa Limitada |  |  |
Schedule of Financial Information of the Subsidiaries Included in the Consolidation of the Bank that Possess Non-Controlling Interests [Line Items] |  |  |
Assets | 92,155 | 99,325 | 321,411
Liabilities | 31,758 | 43,087 | 270,952
Capital | 56,243 | 52,054 | 46,863
Net income | 4,154 | 4,184 | 3,596
Santander Asesorias Financieras Limitada |  |  |
Schedule of Financial Information of the Subsidiaries Included in the Consolidation of the Bank that Possess Non-Controlling Interests [Line Items] |  |  |
Assets | 15,295 | 5,023 | 60,640
Liabilities | 3,205 | 1,442 | 2,725
Capital | 3,582 | 354 | 53,082
Net income | 8,508 | 3,227 | 4,833
Santander S.A. Sociedad Securitizadora |  |  |
Schedule of Financial Information of the Subsidiaries Included in the Consolidation of the Bank that Possess Non-Controlling Interests [Line Items] |  |  |
Assets | 722 | 879 | 1,107
Liabilities | 326 | 345 | 398
Capital | 534 | 709 | 857
Net income | (138) | (175) | (148)
Klare Corredora de Seguros S.A. |  |  |
Schedule of Financial Information of the Subsidiaries Included in the Consolidation of the Bank that Possess Non-Controlling Interests [Line Items] |  |  |
Assets | 0 | 1,891 | 2,153
Liabilities | 0 | 3,610 | 1,440
Capital | 1,955 | 713 | 3,272
Net income | (1,955) | (2,432) | (2,559)
Santander Consumer Chile S.A. |  |  |
Schedule of Financial Information of the Subsidiaries Included in the Consolidation of the Bank that Possess Non-Controlling Interests [Line Items] |  |  |
Assets | 1,049,387 | 923,790 | 884,701
Liabilities | 922,136 | 806,607 | 784,146
Capital | 117,183 | 100,555 | 79,755
Net income | 10,068 | 16,628 | 20,800
Santander Gestión de Recaudación y Cobranzas Ltda. |  |  |
Schedule of Financial Information of the Subsidiaries Included in the Consolidation of the Bank that Possess Non-Controlling Interests [Line Items] |  |  |
Assets | 11,429 | 11,273 | 8,037
Liabilities | 2,443 | 2,755 | 1,049
Capital | 8,518 | 6,988 | 4,820
Net income | 468 | 1,530 | 2,168
Bansa Santander S.A. |  |  |
Schedule of Financial Information of the Subsidiaries Included in the Consolidation of the Bank that Possess Non-Controlling Interests [Line Items] |  |  |
Assets | 0 | 292,937 | 213,661
Liabilities | 0 | 264,601 | 189,411
Capital | (727) | 24,249 | 21,011
Net income | 727 | 4,087 | 3,239
Multiplica Spa |  |  |
Schedule of Financial Information of the Subsidiaries Included in the Consolidation of the Bank that Possess Non-Controlling Interests [Line Items] |  |  |
Assets | 2,883 | 3,518 | 4,337
Liabilities | 857 | 989 | 1,126
Capital | 2,529 | 3,211 | 4,157
Net income | (503) | (682) | (946)
PagoNxt Trade Chile SpA [Member] |  |  |
Schedule of Financial Information of the Subsidiaries Included in the Consolidation of the Bank that Possess Non-Controlling Interests [Line Items] |  |  |
Assets | 2,382 | 2,290 | 0
Liabilities | 1,117 | 1,139 | 0
Capital | 1,151 | 712 | 0
Net income | $ 114 | $ 439 | $ 0

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