| Document and Entity Information | Aug. 15, 2022 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0000763901 |
| Document Type | 8-K |
| Document Period End Date | Aug. 15, 2022 |
| Entity Registrant Name | POPULAR, INC. |
| Entity Incorporation State Country Code | PR |
| Entity File Number | 001-34084 |
| Entity Tax Identification Number | 66-0667416 |
| Entity Address, Address Line One | 209 Muñoz Rivera Avenue |
| Entity Address, City or Town | Hato Rey |
| Entity Address, Country | PR |
| Entity Address, Postal Zip Code | 00918 |
| City Area Code | (787) |
| Local Phone Number | 765-9800 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common Stock ($0.01 par value) |
| Trading Symbol | BPOP |
| Security Exchange Name | NASDAQ |
| Cumulative Preferred Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 6.125% Cumulative Monthly Income Trust Preferred Securities |
| Trading Symbol | BPOPM |
| Security Exchange Name | NASDAQ |
