Nature of Operations	9 Months Ended
Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	NOTE 1 Nature of Operations Brown & Brown, Inc., a Florida corporation, and its subsidiaries (collectively, “Brown & Brown” or the “Company”) is a diversified insurance agency, wholesale brokerage, insurance programs and service organization that markets and sells insurance products and services, primarily in the property, casualty and employee benefits areas. Brown & Brown’s business is divided into four reportable segments. The Retail Segment provides a broad range of insurance products and services to commercial, public and quasi-public entities, professional and individual insured customers, and non-insurance risk-mitigating products through our automobile dealer services (“F&I”) businesses. The National Programs Segment, which acts as a managing general agent (“MGA”), provides professional liability and related package products for certain professionals, a range of insurance products for individuals, flood coverage, and targeted products and services designated for specific industries, trade groups, governmental entities and market niches, all of which are delivered through a nationwide network of independent agents, including Brown & Brown retail agents. The Wholesale Brokerage Segment markets and sells excess and surplus commercial and personal lines insurance, primarily through independent agents and brokers, as well as Brown & Brown retail agents. The Services Segment provides insurance-related services, including third-party claims administration and comprehensive medical utilization management services in both the workers’ compensation and all-lines liability arenas, as well as Medicare Set-aside services, Social Security disability and Medicare benefits advocacy services and claims adjusting services. The Company primarily operates as an agent or broker not assuming underwriting risks. However, we operate a write-your-own flood insurance carrier, Wright National Flood Insurance Company (“WNFIC”). WNFIC’s underwriting business consists of policies written pursuant to the National Flood Insurance Program (“NFIP”), the program administered by the Federal Emergency Management Agency (“FEMA”) to which premiums and underwriting exposure are ceded. The Company also operates two capitalized captive insurance facilities (the "Captives") for the purpose of facilitating additional underwriting capacity and to participate in underwriting results, one on a quota share basis, currently focused on property insurance for earthquake and wind exposed properties for policies placed by certain of our MGA businesses, and the other through excess of loss reinsurance layers associated with placements made by one of our MGA businesses focused on personal property primarily in the southeastern United States. The quota share Captive buys reinsurance, limiting, but not fully eliminating the Company's exposure to underwriting losses. The other Captive has capped exposure through contractual aggregate limits on the reinsurance participations it assumes.

Nature of Operations

9 Months Ended

Sep. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

NOTE 1 Nature of Operations

Brown & Brown, Inc., a Florida corporation, and its subsidiaries (collectively, “Brown & Brown” or the “Company”) is a diversified insurance agency, wholesale brokerage, insurance programs and service organization that markets and sells insurance products and services, primarily in the property, casualty and employee benefits areas. Brown & Brown’s business is divided into four reportable segments. The Retail Segment provides a broad range of insurance products and services to commercial, public and quasi-public entities, professional and individual insured customers, and non-insurance risk-mitigating products through our automobile dealer services (“F&I”) businesses. The National Programs Segment, which acts as a managing general agent (“MGA”), provides professional liability and related package products for certain professionals, a range of insurance products for individuals, flood coverage, and targeted products and services designated for specific industries, trade groups, governmental entities and market niches, all of which are delivered through a nationwide network of independent agents, including Brown & Brown retail agents. The Wholesale Brokerage Segment markets and sells excess and surplus commercial and personal lines insurance, primarily through independent agents and brokers, as well as Brown & Brown retail agents. The Services Segment provides insurance-related services, including third-party claims administration and comprehensive medical utilization management services in both the workers’ compensation and all-lines liability arenas, as well as Medicare Set-aside services, Social Security disability and Medicare benefits advocacy services and claims adjusting services.

The Company primarily operates as an agent or broker not assuming underwriting risks. However, we operate a write-your-own flood insurance carrier, Wright National Flood Insurance Company (“WNFIC”). WNFIC’s underwriting business consists of policies written pursuant to the National Flood Insurance Program (“NFIP”), the program administered by the Federal Emergency Management Agency (“FEMA”) to which premiums and underwriting exposure are ceded. The Company also operates two capitalized captive insurance facilities (the "Captives") for the purpose of facilitating additional underwriting capacity and to participate in underwriting results, one on a quota share basis, currently focused on property insurance for earthquake and wind exposed properties for policies placed by certain of our MGA businesses, and the other through excess of loss reinsurance layers associated with placements made by one of our MGA businesses focused on personal property primarily in the southeastern United States. The quota share Captive buys reinsurance, limiting, but not fully eliminating the Company's exposure to underwriting losses. The other Captive has capped exposure through contractual aggregate limits on the reinsurance participations it assumes.