Grupo Santander - Agreement for the acquisition of Webster Financial Corporation ('Webster') (Details) - Webster Financial Corporation $ / shares in Units, € in Millions, $ in Millions |
Feb. 03, 2026
USD ($)
$ / shares
shares
|
Feb. 03, 2026
EUR (€)
shares
|
|---|---|---|
| Disclosure of detailed information about business combination [line items] | ||
| Consideration paid (received) | $ 12,200 | € 10,300 |
| Portion of consideration paid (received) in cash per share | $ 48.75 | |
| Consideration paid (received), in shares per share | shares | 2.0548 | 2.0548 |
| Consideration paid (received), in cash per share | $ 75 |