Nature of Operations (Policies)	9 Months Ended
Nature of Operations (Policies)	Sep. 30, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
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 services organization that markets and sells to its customers insurance products and services, primarily in the property and casualty area. Brown & Brown’s business is divided into four reportable segments: the Retail Division, which provides a broad range of insurance products and services to commercial, public entity, professional and individual customers; the National Programs Division, acting as a managing general agent (“MGA”), provides professional liability and related package products for certain professionals, flood coverage, targeted products and services designated for specific industries, trade groups, governmental entities and market niches all of which are delivered through nationwide networks of independent agents, and markets; the Wholesale Brokerage Division, which markets and sells excess and surplus commercial insurance and reinsurance, primarily through independent agents and brokers; and the Services Division, which 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 catastrophe claims adjusting services. In addition, as the result of our acquisition of the stock of The Wright Insurance Group, LLC (“Wright”), in May 2014, we own a flood insurance carrier that is a Wright subsidiary. This carrier’s business consists of policies written pursuant to the National Flood Insurance Program (“NFIP”), the program administered by the Federal Emergency Management Agency (“FEMA”) and several excess flood insurance policies which are fully reinsured.
Unpaid Losses and Loss Adjustment Expense	Unpaid Losses and Loss Adjustment Expense Unpaid losses and loss adjustment expenses include amounts determined on individual claims and other estimates based on the past experience of WNFIC and the policyholders for incurred but not reported (“IBNR”) claims, less anticipated salvage and subrogation recoverable. The methods of making such estimates and for establishing the resulting reserves are continually reviewed and updated, and any adjustments resulting therefrom are reflected in operations currently. WNFIC engages the services of outside actuarial consulting firms (the “Actuaries”) to assist on an annual basis to render an opinion on the sufficiency of the Company’s estimates for unpaid losses and related loss adjustment expenses. The Actuaries utilize both industry experience and the Company’s own experience to develop estimates of those amounts as of year-end. These estimated liabilities are subject to the impact of future changes in claim severity, frequency and other factors. In spite of the variability inherent in such estimates, management believes that the liabilities for unpaid losses and related loss adjustment expenses are adequate.
Reinsurance	Reinsurance The Company protects itself from claims related losses by reinsuring all claims related risk exposure. The only line of insurance the Company writes is flood insurance associated with the Wright acquisition, with all exposure reinsured with FEMA for basic admitted policies conforming to the National Flood Insurance Program. For excess flood insurance policies, all exposure is reinsured with a reinsurance carrier. Reinsurance does not legally discharge the ceding insurer from the primary liability for the full amount due under the reinsured policies. Reinsurance premiums, commissions, expense reimbursement and related reserves related to ceded business are accounted for on a basis consistent with the accounting for the original policies issued and the terms of reinsurance contracts. Premiums earned and losses and loss adjustment expenses incurred are reported net of reinsurance amounts. Other underwriting expenses are shown net of earned ceding commission income. The liabilities for unpaid losses and loss adjustment expenses and unearned premiums are reported gross of ceded reinsurance recoverable. Balances due from reinsurers on unpaid losses and loss adjustment expenses, including an estimate of such recoverables related to reserves for incurred but not reported (“IBNR”) losses, are reported as assets and are included in reinsurance recoverable even though amounts due on unpaid loss and loss adjustment expense are not recoverable from the reinsurer until such losses are paid. The Company does not believe it is exposed to any material credit risk through its reinsurance as the reinsurer is FEMA for basic admitted flood policies and a national reinsurance carrier for excess flood policies, which is rated A+ from AM Best. Historically, no amounts due from reinsurance carries have been written off as uncollectible.
Recently Issued Accounting Pronouncements	*Recently Issued Accounting Pronouncements* Disclosure of Uncertainties About an Entity’s Ability to Continue as a Going Concern. In August 2014, the Financial Accounting Standards Board (the “FASB”) issued guidance on disclosure of uncertainties about an entity’s ability to continue as a going concern. This guidance addresses management’s responsibility in evaluating whether there is substantial doubt about a company’s ability to continue as a going concern and to provide related footnote disclosures. The guidance is effective for fiscal years beginning after December 15, 2016 and for interim periods within those fiscal years, with early adoption permitted. The Company does not expect to early adopt this guidance and it believes the adoption of this guidance will not have material impact on the Consolidated Financial Statements. In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, “Revenue from Contracts with Customers” (“ASU 2014-09”), which provides guidance for revenue recognition. ASU 2014-09 affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets and supersedes the revenue recognition requirements in Topic 605, “Revenue Recognition,” and most industry-specific guidance. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which a company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates than under today’s guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. ASU 2014-09 is effective for the Company beginning November 1, 2017 and, at that time the Company may adopt the new standard under the full retrospective approach or the modified retrospective approach. Early adoption is not permitted. The Company is currently evaluating the method and impact the adoption of ASU 2014-09 will have on the Company’s condensed consolidated financial statements and disclosures.
Premiums	Premiums Premiums are recognized as income over the coverage period of the related policies. Unearned premiums represent the portion of premiums written that relate to the unexpired terms of the policies in force and are determined on a daily pro rata basis.

Disclosure of reinsurance accounting policy, for example, but not limited to, description of the methodologies and assumptions underlying determination of reinsurance recoverables, reinsurance payables and retention policy.

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