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Expected Credit Losses Allowance (Details)	12 Months Ended
	Dec. 31, 2021 USD ($)
Disclosure of allowance for credit losses [text block] [Abstract]
Expected credit loss related to macroeconomically scenarios	$ 59,000

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- References

No definition available.

+ Details

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Namespace Prefix:	bsac_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Amount of expected credit loss allowances related to macroeconomy.

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No definition available.

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Namespace Prefix:	bsac_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration