XML 199 R117.htm IDEA: XBRL DOCUMENT
v3.26.1

Introduction, basis of presentation of the consolidated financial statements (consolidated annual accounts) and other information - Capital management (Details) | 12 Months Ended
--- | ---
Dec. 31, 2025
Disclosure of reclassifications or changes in presentation [abstract] |
Positive impact on CET1 | 0.0020

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

X
- Definition Positive Impact On Common Equity Tier One Capital Radio + References No definition available. + Details
Name: | san_PositiveImpactOnCommonEquityTierOneCapitalRadio
Namespace Prefix: | san_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration