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Represent information about debit valuation adjustment.

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Represent information about value of number of shares issued and fully paid.

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No definition available.

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The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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The cash outflow to acquire or redeem entity's shares.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) $ in Millions		12 Months Ended
	Apr. 21, 2016 CLP ($)	Dec. 31, 2018 CLP ($) Segment	Dec. 31, 2017 Segment	Dec. 31, 2016	Sep. 30, 2016
Disclosure of associates [line items]
Foreign exchange rate \| Segment		697.76	616.85
Foreign exchange inflation rate		2.60%	2.30%
Credit valuation adjustment		$ 8,142
Debit valuation adjustment		$ 15,406
Minimum mandatory dividends distributed		30.00%	30.00%
USD [Member]
Disclosure of associates [line items]
Foreign exchange rate \| Segment		1	1
Unidad De Fomento (funds code) [Member]
Disclosure of associates [line items]
Foreign exchange rate \| Segment		27,565.79	26,798.14
Sociedad Operadora de la Camara de Compensacion de pagos de Alto Valor S.A. [Member]
Disclosure of associates [line items]
Increase (decrease) in bank shares percenatge			15.00%	14.84%	14.93%
Servicios de Infraestructura de Mercado OTC S.A. [Member]
Disclosure of associates [line items]
Increase (decrease) in bank shares percenatge				11.93%	12.07%
Transbank S.A. [Member]
Disclosure of associates [line items]
Proportion of ownership interest in subsidiary	25.00%
Payments of shares	$ 4,000
Subscribed and paid shares	$ 1,000
Banco Santander Spain [Member] \| Banco Santander-Chile [Member]
Disclosure of associates [line items]
Proportion of ownership interest in subsidiary		99.50%
Banco Santander Spain [Member] \| Teatinos Siglo XXi inversiones Ltda [Member]
Disclosure of associates [line items]
Proportion of ownership interest in subsidiary		100.00%
Banco Santander Spain [Member] \| Santander-Chile Bank [Member]
Disclosure of associates [line items]
Proportion of ownership interest in subsidiary		67.18%