XML 268 R248.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Subsequent Events (Details) - Forecast [Member] | 12 Months Ended
--- | ---
Dec. 31, 2021
Subsequent Events (Details) [Line Items] |
Percentage of interchange fees | 0.60%
Percentage of debit cards | 1.48%
Percentage of credit cards | 1.04%

X
- Definition Percentage of credit cards. + References No definition available. + Details
Name: | bsac_PercentageOfCreditCards
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of debit cards. + References No definition available. + Details
Name: | bsac_PercentageOfDebitCards
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of interchange fees. + References No definition available. + Details
Name: | bsac_PercentageOfInterchangeFees
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | bsac_SubsequentEventsDetailsLineItems
Namespace Prefix: | bsac_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |