The fair value, at acquisition date, of the consideration transferred in a business combination. [Refer: Business combinations [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2021-01-01
-Paragraph B64
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2021-en-r&anchor=para_B64_f&doctype=Appendix&subtype=B
-URIDate 2021-03-24

Name:	ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Grupo Santander - Acquisition of Amherst Pierpoint, a U.S. fixed-income broker dealer (Details) € in Millions, $ in Millions	Jul. 15, 2021 USD ($)	Jul. 15, 2021 EUR (€)	Dec. 31, 2020 EUR (€)
Disclosure of detailed information about business combination [line items]
Consideration transferred, acquisition-date fair value			€ 711
Amherst Pierpoint Securities \| Group Santander Holdings USA
Disclosure of detailed information about business combination [line items]
Consideration transferred, acquisition-date fair value	$ 600	€ 530