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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
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Non-Controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]      
Assets $ 1,588,588 $ 1,178,676 $ 1,040,914
Liabilities 1,264,340 883,096 763,830
Capital 284,938 280,158 269,657
Net income 39,310 15,422 7,427
Santander Corredora de Seguros Limitada [Member]      
Non-Controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]      
Assets 92,541 88,492 79,936
Liabilities 13,093 13,388 10,777
Capital 71,121 69,129 70,554
Net income 8,327 1,975 (1,395)
Santander Corredores de Bolsa Limitada [Member]      
Non-Controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]      
Assets 321,411 98,496 94,802
Liabilities 270,952 51,649 49,038
Capital 46,863 45,396 45,053
Net income 3,596 1,451 711
Santander Asesorias Financieras Limitada [Member]      
Non-Controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]      
Assets 60,640 54,731 52,070
Liabilities 2,725 1,683 1,142
Capital 53,082 50,900 51,454
Net income 4,833 2,148 (526)
Santander S.A. Sociedad Securitizadora [Member]      
Non-Controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]      
Assets 1,107 810 630
Liabilities 398 463 175
Capital 857 455 547
Net income (148) (108) (92)
Klare Corredora de Seguros S.A. [Member]      
Non-Controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]      
Assets 2,153 3,952 6,415
Liabilities 1,440 681 599
Capital 3,272 5,816 7,579
Net income (2,559) (2,545) (1,763)
Santander Consumer Chile S.A. [Member]      
Non-Controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]      
Assets 884,701 742,700 693,992
Liabilities 784,146 662,945 633,177
Capital 79,755 60,588 49,348
Net income 20,800 19,167 11,467
Santander Gestión de Recaudación y Cobranzas Ltda. [Member]      
Non-Controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]      
Assets 8,037 6,636 7,789
Liabilities 1,049 1,816 3,108
Capital 4,820 4,681 4,808
Net income 2,168 139 (127)
Bansa Santander S.A. [Member]      
Non-Controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]      
Assets 213,661 103,927 84,496
Liabilities 189,411 82,917 64,582
Capital 21,011 19,914 19,565
Net income 3,239 1,096 349
Multiplica Spa [Member]      
Non-Controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]      
Assets 4,337 4,409 4,336
Liabilities 1,126 253 47
Capital 4,157 1,289 4,476
Net income $ (946) $ (133) $ (187)