Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Nov. 05, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity File Number	001-34084
Entity Registrant Name	POPULAR, INC.
Entity Incorporation State Country Code	PR
Entity TaxI dentification Number	66-0667416
Entity Address Address Line 1	Popular Center Building
Entity Address Address Line 2	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
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock Shares Outstanding		79,857,220
Entity Central Index Key	0000763901
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Common Stock
Entity Listings
Security 12b Title	Common Stock ($0.01 par value)
Trading Symbol	BPOP
Security Exchange Name	NASDAQ
Cumulative Preferred Stock 6.125%
Entity Listings
Security 12b Title	6.125% Cumulative Monthly Income Trust Preferred Securities
Trading Symbol	BPOPM
Security Exchange Name	NASDAQ