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Risk Management (Details) - Schedule of Fair Value of Derivative Instruments - Financial Derivative Contracts [Member] $ in Millions | 12 Months Ended
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Dec. 31, 2023 CLP ($)
Credit risk [member] |  |
Risk Management (Details) - Schedule of Fair Value of Derivative Instruments [Line Items] |  |
Derivative Instruments (adjusted to market) | $ 3 |
Deposits | 8 |
Loans | 1 |
Financial investments |  |
Total Exposure | $ 12 |
Hong Kong [Member] | Credit risk [member] |  |
Risk Management (Details) - Schedule of Fair Value of Derivative Instruments [Line Items] |  |
Classification | 2 |
Derivative Instruments (adjusted to market) |  |
Deposits | 7 |
Loans |  |
Financial investments |  |
Total Exposure | $ 7 |
Italy [Member] | Credit risk [member] |  |
Risk Management (Details) - Schedule of Fair Value of Derivative Instruments [Line Items] |  |
Classification | 2 |
Derivative Instruments (adjusted to market) |  |
Deposits | 1 |
Loans |  |
Financial investments |  |
Total Exposure | $ 1 |
México [Member] | Credit risk [member] |  |
Risk Management (Details) - Schedule of Fair Value of Derivative Instruments [Line Items] |  |
Classification | 3 |
Derivative Instruments (adjusted to market) | $ 3 |
Deposits |  |
Loans |  |
Financial investments |  |
Total Exposure | $ 3 |
China [Member] | Credit risk [member] |  |
Risk Management (Details) - Schedule of Fair Value of Derivative Instruments [Line Items] |  |
Classification | 2 |
Derivative Instruments (adjusted to market) |  |
Deposits |  |
Loans | 1 |
Financial investments |  |
Total Exposure | $ 1 |
Banco Santander Hong Kong [Member] | Credit risk [member] |  |
Risk Management (Details) - Schedule of Fair Value of Derivative Instruments [Line Items] |  |
Classification | 2 |
Derivative Instruments (adjusted to market) |  |
Deposits | 7 |
Financial investments |  |
Total Exposure | 7 |
Banco Santander Hong Kong [Member] | Currency risk [member] |  |
Risk Management (Details) - Schedule of Fair Value of Derivative Instruments [Line Items] |  |
Loans |  |
Banco Santander Mexico [Member] | Credit risk [member] |  |
Risk Management (Details) - Schedule of Fair Value of Derivative Instruments [Line Items] |  |
Classification | 3 |
Derivative Instruments (adjusted to market) | $ 3 |
Deposits |  |
Financial investments |  |
Total Exposure | 3 |
Banco Santander Mexico [Member] | Currency risk [member] |  |
Risk Management (Details) - Schedule of Fair Value of Derivative Instruments [Line Items] |  |
Loans |  |
Banco Santander EEUU [Member] | Credit risk [member] |  |
Risk Management (Details) - Schedule of Fair Value of Derivative Instruments [Line Items] |  |
Classification | 1 | [1]
Derivative Instruments (adjusted to market) | $ 41 | [1]
Deposits | 700 | [1]
Financial investments |  | [1]
Total Exposure | 741 | [1]
Banco Santander EEUU [Member] | Currency risk [member] |  |
Risk Management (Details) - Schedule of Fair Value of Derivative Instruments [Line Items] |  |
Loans |  | [1]
Santander UK PLC [Member] | Credit risk [member] |  |
Risk Management (Details) - Schedule of Fair Value of Derivative Instruments [Line Items] |  |
Classification | 1 |
Derivative Instruments (adjusted to market) |  |
Deposits | 1 |
Financial investments |  |
Total Exposure | 1 |
Santander UK PLC [Member] | Currency risk [member] |  |
Risk Management (Details) - Schedule of Fair Value of Derivative Instruments [Line Items] |  |
Loans |  |
Banco Santander España [Member] | Credit risk [member] |  |
Risk Management (Details) - Schedule of Fair Value of Derivative Instruments [Line Items] |  |
Classification | 1 |
Derivative Instruments (adjusted to market) | $ 292 |
Deposits | 46 |
Financial investments |  |
Total Exposure | 338 |
Banco Santander España [Member] | Currency risk [member] |  |
Risk Management (Details) - Schedule of Fair Value of Derivative Instruments [Line Items] |  |
Loans |  |
[1] | Includes BSCH SA New York and Santander InvestmentSecuries

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