Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2023	Oct. 23, 2023
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Entity Registrant Name	BROWN & BROWN, INC.
Entity Central Index Key	0000079282
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		284,597,831
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Title of 12(b) Security	Common Stock, $0.10 Par Value
Trading Symbol	BRO
Security Exchange Name	NYSE
Entity File Number	001-13619
Entity Incorporation, State or Country Code	FL
Entity Tax Identification Number	59-0864469
Entity Address, Address Line One	300 North Beach Street
Entity Address, City or Town	Daytona Beach
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	32114
City Area Code	386
Local Phone Number	252-9601
Document Quarterly Report	true
Document Transition Report	false