XML 120 R38.htm IDEA: XBRL DOCUMENT
v3.26.1

Shareholders' equity | 12 Months Ended
--- | ---
Dec. 31, 2025
Equity [abstract] |
Shareholders' equity | Shareholders' equity The changes in Shareholders' equity are presented in the consolidated statement of changes in total equity. Significant information on certain items of Shareholders' equity and the changes during the year are set forth below.

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

X
- Definition The disclosure for shareholders' equity. + References No definition available. + Details
Name: | san_DisclosureOfShareholdersEquityTextBlock
Namespace Prefix: | san_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration