$BRO
BROWN & BROWN, INC. Stock $bro

$bro Overview Financials Valuation SEC Filings Company Website

2017 Q4 Form 10-K Financial Statement

#000007928219000006 Filed on February 26, 2019

Income Statement

Concept	2017 Q4	2017 Q3	2017 Q2
Revenue	$474.3M	$475.6M	$466.3M
YoY Change	9.37%	2.89%	4.43%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$258.2M	$246.1M	$244.5M
YoY Change	11.1%	3.53%	5.8%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$26.50M	$5.489M	$5.655M
YoY Change	-1.12%	5.66%	5.62%
% of Gross Profit
Operating Expenses	$368.0M	$351.2M	$358.3M
YoY Change	8.63%	1.72%	6.18%
Operating Profit
YoY Change
Interest Expense	-$9.400M	$9.393M	$9.874M
YoY Change	-5.05%	-4.96%	0.38%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$106.3M	$124.4M	$108.0M
YoY Change	12.05%	6.37%	-0.99%
Income Tax	$39.70M	$48.51M	$41.90M
% Of Pretax Income	37.34%	38.99%	38.8%
Net Earnings	$187.5M	$75.91M	$66.10M
YoY Change	225.38%	6.11%	-0.22%
Net Earnings / Revenue	39.53%	15.96%	14.18%
Basic Earnings Per Share	$0.01	$0.00	$0.00
Diluted Earnings Per Share	$0.01	$0.00	$0.00
COMMON SHARES
Basic Shares Outstanding	139.4M shares	272.7M shares	273.4M shares
Diluted Shares Outstanding		277.8M shares	278.2M shares

Balance Sheet

Concept	2017 Q4	2017 Q3	2017 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$598.3M	$575.7M	$630.5M
YoY Change	12.74%	14.68%	34.15%
Cash & Equivalents	$573.4M	$546.5M	$600.3M
Short-Term Investments	$25.00M	$29.20M	$30.20M
Other Short-Term Assets	$47.86M	$45.55M	$51.95M
YoY Change	-5.35%	8.33%	-0.3%
Inventory
Prepaid Expenses
Receivables	$546.4M	$525.9M	$499.7M
Other Receivables	$477.8M	$2.160B	$22.40M
Total Short-Term Assets	$2.242B	$3.916B	$1.779B
YoY Change	29.15%	98.33%	7.99%
LONG-TERM ASSETS
Property, Plant & Equipment	$77.09M	$71.30M	$72.75M
YoY Change	1.69%	-8.33%	-9.62%
Goodwill	$2.716B	$2.701B	$2.692B
YoY Change	1.52%	1.09%	1.0%
Intangibles	$641.0M	$656.1M	$671.9M
YoY Change	-9.39%	-9.65%	-9.86%
Long-Term Investments	$13.90M	$14.10M	$10.90M
YoY Change	-39.57%	-46.39%	-52.61%
Other Assets	$57.28M	$54.97M	$52.48M
YoY Change	27.58%	22.79%	15.51%
Total Long-Term Assets	$3.505B	$3.498B	$3.500B
YoY Change	-0.6%	-1.39%	-1.67%
TOTAL ASSETS
Total Short-Term Assets	$2.242B	$3.916B	$1.779B
Total Long-Term Assets	$3.505B	$3.498B	$3.500B
Total Assets	$5.748B	$7.414B	$5.279B
YoY Change	9.21%	34.27%	1.39%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$64.18M	$63.62M	$103.2M
YoY Change	-7.79%	18.01%	12.68%
Accrued Expenses	$228.7M	$204.2M	$177.0M
YoY Change	13.25%	19.25%	8.22%
Deferred Revenue	$44.50M
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$120.0M	$120.0M	$20.00M
YoY Change	116.22%	49.08%	-75.15%
Total Short-Term Liabilities	$1.987B	$3.632B	$1.420B
YoY Change	37.53%	113.4%	-2.62%
LONG-TERM LIABILITIES
Long-Term Debt	$856.1M	$860.7M	$965.4M
YoY Change	-15.93%	-16.57%	-7.62%
Other Long-Term Liabilities	$65.05M	$56.15M	$62.76M
YoY Change	-19.99%	-35.59%	-22.4%
Total Long-Term Liabilities	$921.2M	$916.9M	$1.028B
YoY Change	-16.23%	-18.05%	-8.68%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.987B	$3.632B	$1.420B
Total Long-Term Liabilities	$921.2M	$916.9M	$1.028B
Total Liabilities	$2.909B	$4.548B	$2.448B
YoY Change	14.3%	61.26%	-5.26%
SHAREHOLDERS EQUITY
Retained Earnings	$2.457B	$2.290B	$2.233B
YoY Change	15.08%	9.26%	9.38%
Common Stock	$512.4M	$508.7M	$494.0M
YoY Change	6.04%	6.24%	7.24%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$386.3M	$315.1M	$268.8M
YoY Change	49.92%	26.02%	7.53%
Treasury Stock Shares	10.72M shares	9.320M shares	8.265M shares
Shareholders Equity	$2.583B	$2.484B	$2.458B
YoY Change
Total Liabilities & Shareholders Equity	$5.748B	$7.414B	$5.279B
YoY Change	9.21%	34.27%	1.39%

Cashflow Statement

Concept	2017 Q4	2017 Q3	2017 Q2
OPERATING ACTIVITIES
Net Income	$187.5M	$75.91M	$66.10M
YoY Change	225.38%	6.11%	-0.22%
Depreciation, Depletion And Amortization	$26.50M	$5.489M	$5.655M
YoY Change	-1.12%	5.66%	5.62%
Cash From Operating Activities	$128.4M	$43.50M	$180.1M
YoY Change	39.72%	-66.1%	14.28%
INVESTING ACTIVITIES
Capital Expenditures	-$11.30M	$4.049M	$5.816M
YoY Change	140.43%	-3.39%	23.96%
Acquisitions
YoY Change
Other Investing Activities	-$10.80M	-$13.70M	-$14.80M
YoY Change	50.0%	114.06%	-78.98%
Cash From Investing Activities	-$22.10M	-$17.80M	-$20.60M
YoY Change	87.29%	67.92%	-72.57%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-105.5M	-79.40M	-108.6M
YoY Change	60.58%	130.14%	242.59%
NET CHANGE
Cash From Operating Activities	128.4M	43.50M	180.1M
Cash From Investing Activities	-22.10M	-17.80M	-20.60M
Cash From Financing Activities	-105.5M	-79.40M	-108.6M
Net Change In Cash	800.0K	-53.70M	50.90M
YoY Change	-94.44%	-164.54%	0.2%
FREE CASH FLOW
Cash From Operating Activities	$128.4M	$43.50M	$180.1M
Capital Expenditures	-$11.30M	$4.049M	$5.816M
Free Cash Flow	$139.7M	$39.45M	$174.3M
YoY Change	44.62%	-68.21%	13.98%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2018	dei	Amendment Flag AmendmentFlag	false
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0000079282
CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018	dei	Entity Registrant Name EntityRegistrantName	BROWN & BROWN, INC.
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2018	dei	Trading Symbol TradingSymbol	BRO
CY2016	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.0025
CY2017	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.0028
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.0031
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.10
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.10
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	560000000	shares
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	560000000	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	286929229	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	293379702	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	276210910	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	279583006	shares
CY2017	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	0	USD
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	10718319	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	13796696	shares
CY2018	dei	Entity Registrant Name EntityRegistrantName	BROWN & BROWN, INC.
CY2018Q4	dei	Entity Public Float EntityPublicFloat	6377992646	USD
CY2019Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	279701832	shares
CY2018	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	2009857000	USD
CY2017	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	1857270000	USD
CY2016	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	1762787000	USD
CY2018	us-gaap	Investment Income Nonoperating InvestmentIncomeNonoperating	2746000	USD
CY2017	us-gaap	Investment Income Nonoperating InvestmentIncomeNonoperating	1626000	USD
CY2016	us-gaap	Investment Income Nonoperating InvestmentIncomeNonoperating	1456000	USD
CY2018	us-gaap	Other Income OtherIncome	1643000	USD
CY2017	us-gaap	Other Income OtherIncome	22451000	USD
CY2016	us-gaap	Other Income OtherIncome	2386000	USD
CY2018	us-gaap	Revenues Revenues	2014246000	USD
CY2017	us-gaap	Revenues Revenues	1881347000	USD
CY2016	us-gaap	Revenues Revenues	1766629000	USD
CY2018	bro	Employee Compensation And Benefits EmployeeCompensationAndBenefits	1068914000	USD
CY2017	bro	Employee Compensation And Benefits EmployeeCompensationAndBenefits	994652000	USD
CY2016	bro	Employee Compensation And Benefits EmployeeCompensationAndBenefits	925217000	USD
CY2018	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	332118000	USD
CY2017	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	283470000	USD
CY2016	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	262872000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	2175000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	2157000	USD
CY2016	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	1291000	USD
CY2018	us-gaap	Adjustment For Amortization AdjustmentForAmortization	86544000	USD
CY2017	us-gaap	Adjustment For Amortization AdjustmentForAmortization	85446000	USD
CY2016	us-gaap	Adjustment For Amortization AdjustmentForAmortization	86663000	USD
CY2018	us-gaap	Depreciation Depreciation	22834000	USD
CY2017	us-gaap	Depreciation Depreciation	22698000	USD
CY2016	us-gaap	Depreciation Depreciation	21003000	USD
CY2018	us-gaap	Interest Expense InterestExpense	40580000	USD
CY2017	us-gaap	Interest Expense InterestExpense	38316000	USD
CY2016	us-gaap	Interest Expense InterestExpense	39481000	USD
CY2018	bro	Change In Estimated Acquisition Earn Out Payable ChangeInEstimatedAcquisitionEarnOutPayable	2969000	USD
CY2017	bro	Change In Estimated Acquisition Earn Out Payable ChangeInEstimatedAcquisitionEarnOutPayable	9200000	USD
CY2016	bro	Change In Estimated Acquisition Earn Out Payable ChangeInEstimatedAcquisitionEarnOutPayable	9185000	USD
CY2018	us-gaap	Operating Expenses OperatingExpenses	1551784000	USD
CY2017	us-gaap	Operating Expenses OperatingExpenses	1431625000	USD
CY2016	us-gaap	Operating Expenses OperatingExpenses	1343130000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	462462000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	449722000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	423499000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	118207000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	50092000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	166008000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	344255000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	399630000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	257491000	USD
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.24
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.43
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.92
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.22
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.40
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.91
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.31
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.28
CY2016	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.25
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	438961000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	573383000	USD
CY2018Q4	us-gaap	Restricted Cash And Investments Current RestrictedCashAndInvestmentsCurrent	338635000	USD
CY2017Q4	us-gaap	Restricted Cash And Investments Current RestrictedCashAndInvestmentsCurrent	250705000	USD
CY2018Q4	us-gaap	Short Term Investments ShortTermInvestments	12868000	USD
CY2017Q4	us-gaap	Short Term Investments ShortTermInvestments	24965000	USD
CY2018Q4	bro	Premiums Commissions And Fees Receivable PremiumsCommissionsAndFeesReceivable	844815000	USD
CY2017Q4	bro	Premiums Commissions And Fees Receivable PremiumsCommissionsAndFeesReceivable	546402000	USD
CY2018Q4	us-gaap	Reinsurance Recoverables Gross ReinsuranceRecoverablesGross	65396000	USD
CY2017Q4	us-gaap	Reinsurance Recoverables Gross ReinsuranceRecoverablesGross	477820000	USD
CY2018Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	337920000	USD
CY2017Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	321017000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	128716000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	47864000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	2167311000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	2242156000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	100395000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	77086000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	3432786000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	2716079000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	898807000	USD
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	641005000	USD
CY2018Q4	us-gaap	Investments Investments	17394000	USD
CY2017Q4	us-gaap	Investments Investments	13949000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	71975000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	57275000	USD
CY2018Q4	us-gaap	Assets Assets	6688668000	USD
CY2017Q4	us-gaap	Assets Assets	5747550000	USD
CY2018Q4	bro	Premiums Payable To Insurance Companies PremiumsPayableToInsuranceCompanies	857559000	USD
CY2017Q4	bro	Premiums Payable To Insurance Companies PremiumsPayableToInsuranceCompanies	685163000	USD
CY2018Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	65212000	USD
CY2017Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	476721000	USD
CY2018Q4	us-gaap	Unearned Premiums UnearnedPremiums	337920000	USD
CY2017Q4	us-gaap	Unearned Premiums UnearnedPremiums	321017000	USD
CY2018Q4	bro	Premium Deposits And Credits Due Customers PremiumDepositsAndCreditsDueCustomers	105640000	USD
CY2017Q4	bro	Premium Deposits And Credits Due Customers PremiumDepositsAndCreditsDueCustomers	91648000	USD
CY2018Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	87345000	USD
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	64177000	USD
CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	279310000	USD
CY2017Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	228748000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	50000000	USD
CY2017Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	120000000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	1782986000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	1987474000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1456990000	USD
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	856141000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	315732000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	256185000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	132392000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	65051000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	29338000	USD
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	28689000	USD
CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	615180000	USD
CY2017Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	483733000	USD
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	477572000	USD
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	386322000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2833622000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2456599000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	3000568000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	2582699000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6688668000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5747550000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	2149776000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	257491000	USD
CY2016	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	23018000	USD
CY2016	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	7658000	USD
CY2016	us-gaap	Adjustment To Additional Paid In Capital Income Tax Effect From Share Based Compensation Net AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet	7346000	USD
CY2016	bro	Common Stock Issuedto Directors CommonStockIssuedtoDirectors	500000	shares
CY2016	us-gaap	Dividends Cash DividendsCash	70262000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	2360211000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	399630000	USD
CY2017Q4	bro	Net Unrealized Holding Gainon Availablefor Sale Securities NetUnrealizedHoldingGainonAvailableforSaleSecurities	-6000	USD
CY2017	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	39965000	USD
CY2017	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	139889000	USD
CY2017	bro	Common Stock Issuedto Directors CommonStockIssuedtoDirectors	500000	shares
CY2017	us-gaap	Dividends Cash DividendsCash	77712000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	2582699000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	344255000	USD
CY2018Q4	bro	Net Unrealized Holding Gainon Availablefor Sale Securities NetUnrealizedHoldingGainonAvailableforSaleSecurities	-78000	USD
CY2018	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	40167000	USD
CY2018	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	100000000	USD
CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	100000000	USD
CY2018	bro	Common Stock Issuedto Directors CommonStockIssuedtoDirectors	700000	shares
CY2018	us-gaap	Dividends Cash DividendsCash	84690000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	3000568000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	344255000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	399630000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	257491000	USD
CY2018	us-gaap	Adjustment For Amortization AdjustmentForAmortization	86544000	USD
CY2017	us-gaap	Adjustment For Amortization AdjustmentForAmortization	85446000	USD
CY2016	us-gaap	Adjustment For Amortization AdjustmentForAmortization	86663000	USD
CY2018	us-gaap	Depreciation Depreciation	22834000	USD
CY2017	us-gaap	Depreciation Depreciation	22698000	USD
CY2016	us-gaap	Depreciation Depreciation	21003000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	33519000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	30631000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	16052000	USD
CY2018	bro	Change In Estimated Acquisition Earn Out Payable ChangeInEstimatedAcquisitionEarnOutPayable	2969000	USD
CY2017	bro	Change In Estimated Acquisition Earn Out Payable ChangeInEstimatedAcquisitionEarnOutPayable	9200000	USD
CY2016	bro	Change In Estimated Acquisition Earn Out Payable ChangeInEstimatedAcquisitionEarnOutPayable	9185000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	15008000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-102183000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	18163000	USD
CY2018	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	1627000	USD
CY2017	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	1840000	USD
CY2016	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	1762000	USD
CY2018	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	10000	USD
CY2017	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	22000	USD
CY2016	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	39000	USD
CY2018	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	0	USD
CY2017	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	0	USD
CY2016	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	7346000	USD
CY2018	bro	Net Loss Gain On Sales Of Investments Fixed Assets And Customer Accounts NetLossGainOnSalesOfInvestmentsFixedAssetsAndCustomerAccounts	1934000	USD
CY2017	bro	Net Loss Gain On Sales Of Investments Fixed Assets And Customer Accounts NetLossGainOnSalesOfInvestmentsFixedAssetsAndCustomerAccounts	1841000	USD
CY2016	bro	Net Loss Gain On Sales Of Investments Fixed Assets And Customer Accounts NetLossGainOnSalesOfInvestmentsFixedAssetsAndCustomerAccounts	-596000	USD
CY2018	bro	Payments On Acquisition Earn Outs In Excess Of Original Estimated Payables PaymentsOnAcquisitionEarnOutsInExcessOfOriginalEstimatedPayables	12538000	USD
CY2017	bro	Payments On Acquisition Earn Outs In Excess Of Original Estimated Payables PaymentsOnAcquisitionEarnOutsInExcessOfOriginalEstimatedPayables	14501000	USD
CY2016	bro	Payments On Acquisition Earn Outs In Excess Of Original Estimated Payables PaymentsOnAcquisitionEarnOutsInExcessOfOriginalEstimatedPayables	3904000	USD
CY2018	bro	Increase Decrease In Premiums Commission And Fees Receivable IncreaseDecreaseInPremiumsCommissionAndFeesReceivable	93630000	USD
CY2017	bro	Increase Decrease In Premiums Commission And Fees Receivable IncreaseDecreaseInPremiumsCommissionAndFeesReceivable	43306000	USD
CY2016	bro	Increase Decrease In Premiums Commission And Fees Receivable IncreaseDecreaseInPremiumsCommissionAndFeesReceivable	63550000	USD
CY2018	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	-412424000	USD
CY2017	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	399737000	USD
CY2016	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	46115000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	16903000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	12356000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	-982000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	22440000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	9747000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	4718000	USD
CY2018	bro	Increase Decrease In Premiums Payable To Insurance Companies IncreaseDecreaseInPremiumsPayableToInsuranceCompanies	141169000	USD
CY2017	bro	Increase Decrease In Premiums Payable To Insurance Companies IncreaseDecreaseInPremiumsPayableToInsuranceCompanies	37380000	USD
CY2016	bro	Increase Decrease In Premiums Payable To Insurance Companies IncreaseDecreaseInPremiumsPayableToInsuranceCompanies	66084000	USD
CY2018	bro	Increase Decrease In Premium Deposits And Credits Due Customers Decrease Increase IncreaseDecreaseInPremiumDepositsAndCreditsDueCustomersDecreaseIncrease	13792000	USD
CY2017	bro	Increase Decrease In Premium Deposits And Credits Due Customers Decrease Increase IncreaseDecreaseInPremiumDepositsAndCreditsDueCustomersDecreaseIncrease	7750000	USD
CY2016	bro	Increase Decrease In Premium Deposits And Credits Due Customers Decrease Increase IncreaseDecreaseInPremiumDepositsAndCreditsDueCustomersDecreaseIncrease	527000	USD
CY2018	bro	Increase Decrease For Loss And Loss Adjustment Expense IncreaseDecreaseForLossAndLossAdjustmentExpense	-411509000	USD
CY2017	bro	Increase Decrease For Loss And Loss Adjustment Expense IncreaseDecreaseForLossAndLossAdjustmentExpense	398638000	USD
CY2016	bro	Increase Decrease For Loss And Loss Adjustment Expense IncreaseDecreaseForLossAndLossAdjustmentExpense	46115000	USD
CY2018	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	16903000	USD
CY2017	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	12356000	USD
CY2016	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-982000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	21880000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	26798000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	30174000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	22801000	USD
CY2017	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	25509000	USD
CY2016	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	8670000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-9232000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-32252000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-25849000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	567529000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	441975000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	411042000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	41520000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	24192000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	17765000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	923874000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	41471000	USD
CY2016	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	122622000	USD
CY2018	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	4984000	USD
CY2017	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	4094000	USD
CY2016	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	4957000	USD
CY2018	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	9284000	USD
CY2017	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	10665000	USD
CY2016	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	25872000	USD
CY2018	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	17923000	USD
CY2017	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	9644000	USD
CY2016	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	18890000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-951771000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-62590000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-142412000	USD
CY2018	bro	Payments On Acquisition Earn Outs PaymentsOnAcquisitionEarnOuts	14059000	USD
CY2017	bro	Payments On Acquisition Earn Outs PaymentsOnAcquisitionEarnOuts	29265000	USD
CY2016	bro	Payments On Acquisition Earn Outs PaymentsOnAcquisitionEarnOuts	24309000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	300000000	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2016	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	120000000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	96750000	USD
CY2016	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	73125000	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	778000	USD
CY2017	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	2821000	USD
CY2018	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	600000000	USD
CY2017	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	0	USD
CY2016	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	0	USD
CY2018	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	250000000	USD
CY2017	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
CY2016	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
CY2018	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	0	USD
CY2017	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	0	USD
CY2016	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	7346000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	19432000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	17422000	USD
CY2016	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	15983000	USD
CY2018	bro	Repurchase Of Stock Benefit Plan Shares For Employees To Fund Tax Withholdings RepurchaseOfStockBenefitPlanSharesForEmployeesToFundTaxWithholdings	12155000	USD
CY2017	bro	Repurchase Of Stock Benefit Plan Shares For Employees To Fund Tax Withholdings RepurchaseOfStockBenefitPlanSharesForEmployeesToFundTaxWithholdings	7565000	USD
CY2016	bro	Repurchase Of Stock Benefit Plan Shares For Employees To Fund Tax Withholdings RepurchaseOfStockBenefitPlanSharesForEmployeesToFundTaxWithholdings	8495000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	91250000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	128639000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	18908000	USD
CY2018	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	8750000	USD
CY2017	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	11250000	USD
CY2016	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	11250000	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	84690000	USD
CY2017	us-gaap	Payments Of Dividends PaymentsOfDividends	77712000	USD
CY2016	us-gaap	Payments Of Dividends PaymentsOfDividends	70262000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	337750000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-336580000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-160520000	USD
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-46492000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	42805000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	108110000	USD
CY2017	bro	Cash Cash Equivalentsand Restricted Cash CashCashEquivalentsandRestrictedCash	824088000	USD
CY2016	bro	Cash Cash Equivalentsand Restricted Cash CashCashEquivalentsandRestrictedCash	781283000	USD
CY2015	bro	Cash Cash Equivalentsand Restricted Cash CashCashEquivalentsandRestrictedCash	673173000	USD
CY2018	bro	Cash Cash Equivalentsand Restricted Cash CashCashEquivalentsandRestrictedCash	777596000	USD
CY2017	bro	Cash Cash Equivalentsand Restricted Cash CashCashEquivalentsandRestrictedCash	824088000	USD
CY2016	bro	Cash Cash Equivalentsand Restricted Cash CashCashEquivalentsandRestrictedCash	781283000	USD
CY2018	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	Segment
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	213200000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	210400000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	210000000.0	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	411000000.0	USD
CY2017Q4	bro	Premiums Commissions And Fees Receivable PremiumsCommissionsAndFeesReceivable	546402000	USD
CY2018Q1	bro	Premiums Commissions And Fees Receivable PremiumsCommissionsAndFeesReceivable	699460000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	47864000	USD
CY2018Q1	us-gaap	Other Assets Current OtherAssetsCurrent	100544000	USD
CY2017Q4	bro	Premiums Payable To Insurance Companies PremiumsPayableToInsuranceCompanies	685163000	USD
CY2018Q1	bro	Premiums Payable To Insurance Companies PremiumsPayableToInsuranceCompanies	697270000	USD
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	64177000	USD
CY2018Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	72924000	USD
CY2017Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	228748000	USD
CY2018Q1	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	251542000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	256185000	USD
CY2018Q1	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	300760000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2456599000	USD
CY2018Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2574114000	USD
CY2018	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	2009857000	USD
CY2018	us-gaap	New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Quantification NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification	18399000	USD
CY2018	bro	Employee Compensation And Benefits EmployeeCompensationAndBenefits	1068914000	USD
CY2018	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	332118000	USD
CY2018	us-gaap	New Accounting Pronouncement Or Change In Accounting Principle Effect Of Change On Net Income NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnNetIncome	-12367000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	118207000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	344255000	USD
CY2018	bro	Average Annual Operating Profit Earned Period Maximum AverageAnnualOperatingProfitEarnedPeriodMaximum	P3Y
CY2018	us-gaap	Use Of Estimates UseOfEstimates	Use of Estimates The preparation of the Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, as well as disclosures of contingent assets and liabilities, at the date of the Consolidated Financial Statements, and the reported amounts of revenues and expenses during the reporting period. Actual results may differ from those estimates
CY2018	us-gaap	Net Income Loss NetIncomeLoss	344255000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	399630000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	257491000	USD
CY2018	bro	Net Income Attributable To Unvested Awarded Performance Stock NetIncomeAttributableToUnvestedAwardedPerformanceStock	8297000	USD
CY2017	bro	Net Income Attributable To Unvested Awarded Performance Stock NetIncomeAttributableToUnvestedAwardedPerformanceStock	9746000	USD
CY2016	bro	Net Income Attributable To Unvested Awarded Performance Stock NetIncomeAttributableToUnvestedAwardedPerformanceStock	6705000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	335958000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	389884000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	250786000	USD
CY2018	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	277663000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	279394000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	279558000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	6692000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	6814000	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	7280000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	270971000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	272580000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	272278000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	4550000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	5006000	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	3330000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	275521000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	277586000	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	275608000	shares
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.24
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.43
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.92
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.22
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.40
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.91
CY2018Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	499100000	USD
CY2018	bro	Debt Instrument Revolving And Term Loan DebtInstrumentRevolvingAndTermLoan	1015000000.0	USD
CY2018	us-gaap	Insurance Commissions InsuranceCommissions	1362037000	USD
CY2018	us-gaap	Fees And Commissions Other FeesAndCommissionsOther	530838000	USD
CY2018	bro	Incentive Commission IncentiveCommission	51146000	USD
CY2018	bro	Contingentcommissions Contingentcommissions	55875000	USD
CY2018	bro	Guaranteed Supplemental Commissions GuaranteedSupplementalCommissions	9961000	USD
CY2018	us-gaap	Investment Income Nonoperating InvestmentIncomeNonoperating	2746000	USD
CY2018	us-gaap	Other Income OtherIncome	1643000	USD
CY2018	us-gaap	Revenues Revenues	2014246000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	265994000	USD
CY2017Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	210323000	USD
CY2018Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	53496000	USD
CY2017Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	51236000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	37000000.0	USD
CY2018Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	16500000	USD
CY2017Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	44500000	USD
CY2017Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	6700000	USD
CY2018	us-gaap	Deferred Revenue Revenue Recognized1 DeferredRevenueRevenueRecognized1	8900000	USD
CY2018	bro	Business Acquisitions Purchase Price Allocation Adjustment Purchase Price BusinessAcquisitionsPurchasePriceAllocationAdjustmentPurchasePrice	21400	USD
CY2018	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	934900000	USD
CY2017	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	41500000	USD
CY2018	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	23	acquisition
CY2017	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	11	acquisition
CY2018	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	934928000	USD
CY2018	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	100000000	USD
CY2018Q4	bro	Business Acquisition Cost Of Acquired Entity Other Payable BusinessAcquisitionCostOfAcquiredEntityOtherPayable	5462000	USD
CY2018Q4	bro	Business Acquisitions Contingent Consideration At Fair Value BusinessAcquisitionsContingentConsiderationAtFairValue	77377000	USD
CY2018Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	1117767000	USD
CY2018Q4	us-gaap	Business Combination Contingent Consideration Arrangements Range Of Outcomes Value High BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh	147668000	USD
CY2018Q4	bro	Business Acquisitions Purchase Price Allocation Current Assets Cash And Cash Equivalents BusinessAcquisitionsPurchasePriceAllocationCurrentAssetsCashAndCashEquivalents	11054000	USD
CY2018Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Prepaid Expense And Other Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets	52917000	USD
CY2018Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment	5829000	USD
CY2018Q4	us-gaap	Goodwill Fair Value Disclosure GoodwillFairValueDisclosure	717710000	USD
CY2018Q4	bro	Business Acquisitions Purchase Price Allocation Amortizable Intangible Assets BusinessAcquisitionsPurchasePriceAllocationAmortizableIntangibleAssets	342008000	USD
CY2018Q4	bro	Business Acquisitions Purchase Price Allocation Noncompete Agreements Gross BusinessAcquisitionsPurchasePriceAllocationNoncompeteAgreementsGross	3222000	USD
CY2018Q4	bro	Business Acquisitions Purchase Price Allocation Other Noncurrent Assets BusinessAcquisitionsPurchasePriceAllocationOtherNoncurrentAssets	18588000	USD
CY2018Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets	1151328000	USD
CY2018Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Other BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther	32996000	USD
CY2018Q4	bro	Business Acquisition Purchase Price Allocation Other Liabilities Assumed BusinessAcquisitionPurchasePriceAllocationOtherLiabilitiesAssumed	565000	USD
CY2018Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities	33561000	USD
CY2018Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	1117767000	USD
CY2018Q4	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount	640300000	USD
CY2018Q4	bro	Business Acquisition Purchase Price Allocation Goodwill Non Deductible Amount BusinessAcquisitionPurchasePriceAllocationGoodwillNonDeductibleAmount	77400000	USD
CY2018	us-gaap	Business Combination Pro Forma Information Revenue Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual	82400000	USD
CY2018	bro	Business Combination Pro Forma Information Income Loss Before Income Taxes Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationIncomeLossBeforeIncomeTaxesOfAcquireeSinceAcquisitionDateActual	6300000	USD
CY2017	bro	Business Acquisitions Purchase Price Allocation Adjustment Purchase Price BusinessAcquisitionsPurchasePriceAllocationAdjustmentPurchasePrice	1500000	USD
CY2017	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	41471000	USD
CY2017Q4	bro	Business Acquisition Cost Of Acquired Entity Other Payable BusinessAcquisitionCostOfAcquiredEntityOtherPayable	11708000	USD
CY2017Q4	bro	Business Acquisitions Contingent Consideration At Fair Value BusinessAcquisitionsContingentConsiderationAtFairValue	6921000	USD
CY2017Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	60100000	USD
CY2017Q4	us-gaap	Business Combination Contingent Consideration Arrangements Range Of Outcomes Value High BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh	27451000	USD
CY2017Q4	bro	Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets BusinessAcquisitionPurchasePriceAllocationCurrentAssetsPrepaidExpensesAndOtherAssets	601000	USD
CY2017Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment	69000	USD
CY2017Q4	us-gaap	Goodwill Fair Value Disclosure GoodwillFairValueDisclosure	42172000	USD
CY2017Q4	bro	Business Acquisitions Purchase Price Allocation Amortizable Intangible Assets BusinessAcquisitionsPurchasePriceAllocationAmortizableIntangibleAssets	18738000	USD
CY2017Q4	bro	Business Acquisitions Purchase Price Allocation Noncompete Agreements Gross BusinessAcquisitionsPurchasePriceAllocationNoncompeteAgreementsGross	721000	USD
CY2017Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets	62301000	USD
CY2017Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Other BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther	1512000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	689000	USD
CY2017Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities	2201000	USD
CY2017Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	60100000	USD
CY2017Q4	us-gaap	Goodwill Fair Value Disclosure GoodwillFairValueDisclosure	42200000	USD
CY2017Q4	us-gaap	Goodwill Fair Value Disclosure GoodwillFairValueDisclosure	42200000	USD
CY2017Q4	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount	35300000	USD
CY2017Q4	bro	Earn Out Payable Not Deductible Until Earned Paid EarnOutPayableNotDeductibleUntilEarnedPaid	6900000	USD
CY2017	us-gaap	Business Combination Pro Forma Information Revenue Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual	7800000	USD
CY2017	bro	Business Combination Pro Forma Information Income Loss Before Income Taxes Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationIncomeLossBeforeIncomeTaxesOfAcquireeSinceAcquisitionDateActual	2400000	USD
CY2016	bro	Business Acquisitions Purchase Price Allocation Adjustment Purchase Price BusinessAcquisitionsPurchasePriceAllocationAdjustmentPurchasePrice	917497	USD
CY2016	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	124716000	USD
CY2016Q4	bro	Business Acquisition Cost Note Payable BusinessAcquisitionCostNotePayable	492000	USD
CY2016Q4	bro	Business Acquisition Cost Of Acquired Entity Other Payable BusinessAcquisitionCostOfAcquiredEntityOtherPayable	10664000	USD
CY2016Q4	bro	Business Acquisitions Contingent Consideration At Fair Value BusinessAcquisitionsContingentConsiderationAtFairValue	4462000	USD
CY2016Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	140334000	USD
CY2016Q4	us-gaap	Business Combination Contingent Consideration Arrangements Range Of Outcomes Value High BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh	16285000	USD
CY2016Q4	bro	Business Acquisitions Purchase Price Allocation Current Assets Cash And Cash Equivalents BusinessAcquisitionsPurchasePriceAllocationCurrentAssetsCashAndCashEquivalents	2094000	USD
CY2016Q4	bro	Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets BusinessAcquisitionPurchasePriceAllocationCurrentAssetsPrepaidExpensesAndOtherAssets	5079000	USD
CY2016Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment	684000	USD
CY2016Q4	us-gaap	Goodwill Fair Value Disclosure GoodwillFairValueDisclosure	93376000	USD
CY2016Q4	bro	Business Acquisitions Purchase Price Allocation Amortizable Intangible Assets BusinessAcquisitionsPurchasePriceAllocationAmortizableIntangibleAssets	50625000	USD
CY2016Q4	bro	Business Acquisitions Purchase Price Allocation Noncompete Agreements Gross BusinessAcquisitionsPurchasePriceAllocationNoncompeteAgreementsGross	228000	USD
CY2016Q4	bro	Business Acquisitions Purchase Price Allocation Other Noncurrent Assets BusinessAcquisitionsPurchasePriceAllocationOtherNoncurrentAssets	20000	USD
CY2016Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets	152106000	USD
CY2016Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Other BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther	8542000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	3230000	USD
CY2016Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities	11772000	USD
CY2016Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	140334000	USD
CY2016Q4	us-gaap	Goodwill Fair Value Disclosure GoodwillFairValueDisclosure	93400000	USD
CY2016Q4	us-gaap	Goodwill Fair Value Disclosure GoodwillFairValueDisclosure	93400000	USD
CY2016Q4	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount	88900000	USD
CY2016Q4	bro	Earn Out Payable Not Deductible Until Earned Paid EarnOutPayableNotDeductibleUntilEarnedPaid	4500000	USD
CY2016	us-gaap	Business Combination Pro Forma Information Revenue Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual	34200000	USD
CY2016	bro	Business Combination Pro Forma Information Income Loss Before Income Taxes Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationIncomeLossBeforeIncomeTaxesOfAcquireeSinceAcquisitionDateActual	4300000	USD
CY2018Q4	bro	Maximum Future Contingencypayments Acquisitions MaximumFutureContingencypaymentsAcquisitions	198600000	USD
CY2017Q4	bro	Business Acquisition Earn Out Payables BusinessAcquisitionEarnOutPayables	36175000	USD
CY2016Q4	bro	Business Acquisition Earn Out Payables BusinessAcquisitionEarnOutPayables	63821000	USD
CY2015Q4	bro	Business Acquisition Earn Out Payables BusinessAcquisitionEarnOutPayables	78387000	USD
CY2018	bro	Additions To Estimated Acquisition Earn Out Payables AdditionsToEstimatedAcquisitionEarnOutPayables	77377000	USD
CY2017	bro	Additions To Estimated Acquisition Earn Out Payables AdditionsToEstimatedAcquisitionEarnOutPayables	6920000	USD
CY2016	bro	Additions To Estimated Acquisition Earn Out Payables AdditionsToEstimatedAcquisitionEarnOutPayables	4462000	USD
CY2018	bro	Payments For Estimated Acquisition Earn Out Payables PaymentsForEstimatedAcquisitionEarnOutPayables	-26597000	USD
CY2017	bro	Payments For Estimated Acquisition Earn Out Payables PaymentsForEstimatedAcquisitionEarnOutPayables	-43766000	USD
CY2016	bro	Payments For Estimated Acquisition Earn Out Payables PaymentsForEstimatedAcquisitionEarnOutPayables	-28213000	USD
CY2018	bro	Business Acquisition Earn Out Payable After Change In Additions And Payments BusinessAcquisitionEarnOutPayableAfterChangeInAdditionsAndPayments	86955000	USD
CY2017	bro	Business Acquisition Earn Out Payable After Change In Additions And Payments BusinessAcquisitionEarnOutPayableAfterChangeInAdditionsAndPayments	26975000	USD
CY2016	bro	Business Acquisition Earn Out Payable After Change In Additions And Payments BusinessAcquisitionEarnOutPayableAfterChangeInAdditionsAndPayments	54636000	USD
CY2018	bro	Change In Fair Value Estimated Acquisition Earn Out Payables ChangeInFairValueEstimatedAcquisitionEarnOutPayables	603000	USD
CY2017	bro	Change In Fair Value Estimated Acquisition Earn Out Payables ChangeInFairValueEstimatedAcquisitionEarnOutPayables	6874000	USD
CY2016	bro	Change In Fair Value Estimated Acquisition Earn Out Payables ChangeInFairValueEstimatedAcquisitionEarnOutPayables	6338000	USD
CY2018	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	2366000	USD
CY2017	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	2326000	USD
CY2016	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	2847000	USD
CY2018	bro	Change In Estimated Acquisition Earn Out Payable ChangeInEstimatedAcquisitionEarnOutPayable	2969000	USD
CY2017	bro	Change In Estimated Acquisition Earn Out Payable ChangeInEstimatedAcquisitionEarnOutPayable	9200000	USD
CY2016	bro	Change In Estimated Acquisition Earn Out Payable ChangeInEstimatedAcquisitionEarnOutPayable	9185000	USD
CY2018Q4	bro	Business Acquisition Earn Out Payables BusinessAcquisitionEarnOutPayables	89924000	USD
CY2017Q4	bro	Business Acquisition Earn Out Payables BusinessAcquisitionEarnOutPayables	36175000	USD
CY2016Q4	bro	Business Acquisition Earn Out Payables BusinessAcquisitionEarnOutPayables	63821000	USD
CY2018Q4	bro	Business Acquisition Earn Out Payables BusinessAcquisitionEarnOutPayables	89900000	USD
CY2017Q4	bro	Business Acquisition Earn Out Payables BusinessAcquisitionEarnOutPayables	36200000	USD
CY2016Q4	bro	Business Acquisition Earn Out Payables BusinessAcquisitionEarnOutPayables	63800000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	2675402000	USD
CY2017	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	42172000	USD
CY2017	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	1495000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	2716079000	USD
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	717710000	USD
CY2018	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	1003000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	3432786000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	1837873000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	939066000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	898807000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	1494561000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	853556000	USD
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	641005000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	100400000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	93000000.0	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	89500000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	85000000.0	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	78000000.0	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	22352000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	7000	USD
CY2018Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	222000	USD
CY2018Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	22137000	USD
CY2018Q4	us-gaap	Time Deposits TimeDeposits	8100000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	6323000	USD
CY2018Q4	bro	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses Accumulated In Aoci AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLossesAccumulatedInAoci	6000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	12734000	USD
CY2018Q4	bro	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses Accumulated In Aoci AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInAoci	216000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	19057000	USD
CY2018Q4	bro	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses Accumulated In Aoci AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInAoci	222000	USD
CY2018Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	20	Securities
CY2017Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	31042000	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	12000	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	206000	USD
CY2017Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	30848000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	18319000	USD
CY2017Q4	bro	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses Accumulated In Aoci AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLossesAccumulatedInAoci	157000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	11845000	USD
CY2017Q4	bro	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses Accumulated In Aoci AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInAoci	49000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	30164000	USD
CY2017Q4	bro	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses Accumulated In Aoci AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInAoci	206000	USD
CY2017Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	27	Securities
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	4768000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	4743000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	17584000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	17394000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	0	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	0	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	22352000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	22137000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	16934000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	16899000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	13876000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	13708000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	232000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	241000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	31042000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	30848000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	17100000	USD
CY2018	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	17900000	USD
CY2018	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	9300000	USD
CY2017	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	5800000	USD
CY2017	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	9600000	USD
CY2018Q4	us-gaap	Assets Held By Insurance Regulators AssetsHeldByInsuranceRegulators	4100000	USD
CY2018Q4	us-gaap	Development In Process DevelopmentInProcess	7568000	USD
CY2017Q4	us-gaap	Development In Process DevelopmentInProcess	0	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	268875000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	233908000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	168480000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	156822000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	100395000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	77086000	USD
CY2018	us-gaap	Depreciation Depreciation	22800000	USD
CY2017	us-gaap	Depreciation Depreciation	22700000	USD
CY2016	us-gaap	Depreciation Depreciation	21000000.0	USD
CY2018Q4	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	120228000	USD
CY2017Q4	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	106923000	USD
CY2018Q4	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	51731000	USD
CY2017Q4	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	40540000	USD
CY2018Q4	bro	Accrued Rentand Vendor Expenses AccruedRentandVendorExpenses	34110000	USD
CY2017Q4	bro	Accrued Rentand Vendor Expenses AccruedRentandVendorExpenses	30616000	USD
CY2018Q4	us-gaap	Deferred Revenue DeferredRevenue	37018000	USD
CY2017Q4	us-gaap	Deferred Revenue DeferredRevenue	21921000	USD
CY2018Q4	bro	Reserveforpolicycancellations Reserveforpolicycancellations	15197000	USD
CY2017Q4	bro	Reserveforpolicycancellations Reserveforpolicycancellations	11048000	USD
CY2018Q4	us-gaap	Interest Payable Current InterestPayableCurrent	7669000	USD
CY2017Q4	us-gaap	Interest Payable Current InterestPayableCurrent	6749000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	13357000	USD
CY2017Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	10951000	USD
CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	279310000	USD
CY2017Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	228748000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	50000000	USD
CY2017Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	120000000	USD
CY2018Q4	us-gaap	Senior Notes SeniorNotes	499101000	USD
CY2017Q4	us-gaap	Senior Notes SeniorNotes	498943000	USD
CY2018Q4	us-gaap	Line Of Credit LineOfCredit	965000000	USD
CY2017Q4	us-gaap	Line Of Credit LineOfCredit	365000000	USD
CY2018Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	7111000	USD
CY2017Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	7802000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1456990000	USD
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	856141000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	50000000	USD
CY2017Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	120000000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	1506990000	USD
CY2017Q4	us-gaap	Long Term Debt LongTermDebt	976141000	USD
CY2018	bro	Notes Receivable On Sale Of Fixed Assets And Customer Accounts NotesReceivableOnSaleOfFixedAssetsAndCustomerAccounts	52000	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	143100000	USD
CY2014Q2	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	500000000.0	USD
CY2014Q2	bro	Unsecured Revolving Credit Facility UnsecuredRevolvingCreditFacility	800000000.0	USD
CY2014Q2	us-gaap	Unsecured Long Term Debt UnsecuredLongTermDebt	550000000.0	USD
CY2014Q2	bro	Unsecured Revolving Credit Facility UnsecuredRevolvingCreditFacility	800000000.0	USD
CY2017Q2	bro	Unsecured Revolving Credit Facility UnsecuredRevolvingCreditFacility	400000000.0	USD
CY2018Q3	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	2800000	USD
CY2018Q3	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	200000	USD
CY2017Q2	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	1600000	USD
CY2018Q4	us-gaap	Debt Instrument Periodic Payment Principal DebtInstrumentPeriodicPaymentPrincipal	5000000.0	USD
CY2018Q4	us-gaap	Unsecured Long Term Debt UnsecuredLongTermDebt	365000000.0	USD
CY2018Q4	bro	Unsecured Revolving Credit Facility UnsecuredRevolvingCreditFacility	350000000.0	USD
CY2018Q4	bro	Unsecured Revolving Credit Facility UnsecuredRevolvingCreditFacility	600000000.0	USD
CY2018Q4	us-gaap	Debt Instrument Periodic Payment DebtInstrumentPeriodicPayment	250000000.0	USD
CY2018	us-gaap	Interest Paid InterestPaid	38000000.0	USD
CY2017	us-gaap	Interest Paid InterestPaid	36200000	USD
CY2016	us-gaap	Interest Paid InterestPaid	37700000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	50000000.0	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	55000000.0	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	70000000.0	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	630000000.0	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	210000000.0	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	500000000.0	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2018	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	1600000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	77694000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	129954000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	126145000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	25096000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	21392000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	21110000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	409000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	929000	USD
CY2016	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	590000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	103199000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	152275000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	147845000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	8483000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	18999000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	15551000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	6519000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	2984000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	2612000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	6000	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0	USD
CY2016	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0	USD
CY2018	bro	Deferred Tax Provision DeferredTaxProvision	15008000	USD
CY2017	bro	Deferred Tax Provision DeferredTaxProvision	-102183000	USD
CY2016	bro	Deferred Tax Provision DeferredTaxProvision	18163000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	118207000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	50092000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	166008000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.057
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.038
CY2016	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.039
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.002
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.003
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.003
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Meals And Entertainment EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment	0.003
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Meals And Entertainment EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment	0.003
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Meals And Entertainment EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment	0.003
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	0.003	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	0	USD
CY2018Q4	bro	Tax Reform Act Deferred Tax Revaluationand Transition Tax Impact TaxReformActDeferredTaxRevaluationandTransitionTaxImpact	-0.003
CY2017Q4	bro	Tax Reform Act Deferred Tax Revaluationand Transition Tax Impact TaxReformActDeferredTaxRevaluationandTransitionTaxImpact	-0.269
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	-0.016
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	-0.014
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	-0.003
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.256
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.111
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.392
CY2018Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	334200000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	306351000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	4929000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2723000	USD
CY2018Q4	bro	Net Unrealized Holding Gainon Availablefor Sale Securities NetUnrealizedHoldingGainonAvailableforSaleSecurities	-78000	USD
CY2017Q4	bro	Net Unrealized Holding Gainon Availablefor Sale Securities NetUnrealizedHoldingGainonAvailableforSaleSecurities	-6000	USD
CY2018Q4	bro	Non Current Deferred Tax Liability NonCurrentDeferredTaxLiability	368780000	USD
CY2017Q4	bro	Non Current Deferred Tax Liability NonCurrentDeferredTaxLiability	309068000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	41293000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	36701000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	10455000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	7534000	USD
CY2018Q4	bro	Deferredprofitsharingcontingentcommissions Deferredprofitsharingcontingentcommissions	0	USD
CY2017Q4	bro	Deferredprofitsharingcontingentcommissions Deferredprofitsharingcontingentcommissions	7107000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	2196000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	2434000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	896000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	893000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	53048000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	52883000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	315732000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	256185000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	110600000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	152000000.0	USD
CY2018Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	100000	USD
CY2018Q4	bro	Operating Loss Carryforwards State OperatingLossCarryforwardsState	42500000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1694000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	750000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	584000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	594000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1070000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	412000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	5000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	41000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	644000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	126000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	205000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1639000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1694000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	750000	USD
CY2018Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	197205	USD
CY2017Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	228608	USD
CY2016Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	86191	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1600000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1700000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	800000	USD
CY2018	bro	Service Period Eligibleto Participatefor Employee Savings Plan ServicePeriodEligibletoParticipateforEmployeeSavingsPlan	30	USD
CY2018	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.040
CY2016	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.025
CY2018	bro	Discretionary Profit Sharing Contribution Percentageof Employees Salary DiscretionaryProfitSharingContributionPercentageofEmployeesSalary	0.015
CY2018	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	22800000	USD
CY2017	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	19600000	USD
CY2016	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	19300000	USD
CY2018Q4	bro	Maximum Number Of Shares Available To Be Granted Under Award Stock Plan MaximumNumberOfSharesAvailableToBeGrantedUnderAwardStockPlan	28800000	shares
CY2018Q4	bro	Incremental Increases In Average Stock Price From Initial Grant Price IncrementalIncreasesInAverageStockPriceFromInitialGrantPrice	0.20
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1	P15Y
CY2009Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1	P20Y
CY2018	bro	Attainment Age Of Stock Plan AttainmentAgeOfStockPlan	attainment of age 64
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	10269384	shares
CY2018Q4	bro	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Awarded Shares Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedSharesOutstandingNumber	1196092	shares
CY2018Q4	bro	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Distributed Shares Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedSharesOutstandingNumber	9073292	shares
CY2018	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Lower Range Limit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit	8.16
CY2018	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Upper Range Limit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit	12.84
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	11900000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	6300000	USD
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	18100000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Maximum Employee Subscription Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate	0.10
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	33519000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	30631000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	16052000	USD
CY2018Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	97100000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P3Y3M14D
CY2018	us-gaap	Interest Paid InterestPaid	38032000	USD
CY2017	us-gaap	Interest Paid InterestPaid	36172000	USD
CY2016	us-gaap	Interest Paid InterestPaid	37652000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	110557000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	152024000	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	143111000	USD
CY2018Q4	bro	Other Payables OtherPayables	5462000	USD
CY2017Q4	bro	Other Payables OtherPayables	11708000	USD
CY2016Q4	bro	Other Payables OtherPayables	10664000	USD
CY2018	bro	Recorded Earn Out Payable RecordedEarnOutPayable	77378000	USD
CY2017	bro	Recorded Earn Out Payable RecordedEarnOutPayable	6921000	USD
CY2016	bro	Recorded Earn Out Payable RecordedEarnOutPayable	4463000	USD
CY2018	us-gaap	Notes Assumed1 NotesAssumed1	0	USD
CY2017	us-gaap	Notes Assumed1 NotesAssumed1	0	USD
CY2016	us-gaap	Notes Assumed1 NotesAssumed1	492000	USD
CY2017	bro	Notes Receivable On Sale Of Fixed Assets And Customer Accounts NotesReceivableOnSaleOfFixedAssetsAndCustomerAccounts	0	USD
CY2016	bro	Notes Receivable On Sale Of Fixed Assets And Customer Accounts NotesReceivableOnSaleOfFixedAssetsAndCustomerAccounts	22000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	90828000	USD
CY2018Q1	us-gaap	Operating Expenses OperatingExpenses	383020000	USD
CY2018Q2	us-gaap	Operating Expenses OperatingExpenses	372277000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	438961000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	573383000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	515646000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	338635000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	250705000	USD
CY2016Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	265637000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	54600000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	51000000.0	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	49300000	USD
CY2018Q1	us-gaap	Revenues Revenues	501461000	USD
CY2018Q2	us-gaap	Revenues Revenues	473187000	USD
CY2018Q3	us-gaap	Revenues Revenues	530850000	USD
CY2018Q4	us-gaap	Revenues Revenues	508748000	USD
CY2018Q3	us-gaap	Operating Expenses OperatingExpenses	388350000	USD
CY2018Q4	us-gaap	Operating Expenses OperatingExpenses	408137000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	118441000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	142500000	USD
CY2018Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	100611000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	100910000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	73922000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	106053000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	73452000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.0033
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.0027
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.0038
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.0026
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.0032
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.0026
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.0038
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.0026
CY2017Q1	us-gaap	Revenues Revenues	465080000	USD
CY2017Q2	us-gaap	Revenues Revenues	466305000	USD
CY2017Q3	us-gaap	Revenues Revenues	475646000	USD
CY2017Q4	us-gaap	Revenues Revenues	474316000	USD
CY2017Q1	us-gaap	Operating Expenses OperatingExpenses	354113000	USD
CY2017Q2	us-gaap	Operating Expenses OperatingExpenses	358303000	USD
CY2017Q3	us-gaap	Operating Expenses OperatingExpenses	351227000	USD
CY2017Q4	us-gaap	Operating Expenses OperatingExpenses	367982000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	110967000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	108002000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	124419000	USD
CY2017Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	106334000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	70110000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	66102000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	75913000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	187505000	USD
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.0025
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.0024
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.0027
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.0068
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.0025
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.0023
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.0027
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.0066
CY2018	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	Segment
CY2018	us-gaap	Revenues Revenues	2014246000	USD
CY2018	us-gaap	Investment Income Nonoperating InvestmentIncomeNonoperating	2746000	USD
CY2018	us-gaap	Adjustment For Amortization AdjustmentForAmortization	86544000	USD
CY2018	us-gaap	Depreciation Depreciation	22834000	USD
CY2018	us-gaap	Interest Expense InterestExpense	40580000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	462462000	USD
CY2018Q4	us-gaap	Assets Assets	6688668000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	41520000	USD
CY2017	us-gaap	Revenues Revenues	1881347000	USD
CY2017	us-gaap	Investment Income Nonoperating InvestmentIncomeNonoperating	1626000	USD
CY2017	us-gaap	Adjustment For Amortization AdjustmentForAmortization	85446000	USD
CY2017	us-gaap	Depreciation Depreciation	22698000	USD
CY2017	us-gaap	Interest Expense InterestExpense	38316000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	449722000	USD
CY2017Q4	us-gaap	Assets Assets	5747550000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	24192000	USD
CY2016	us-gaap	Revenues Revenues	1766629000	USD
CY2016	us-gaap	Investment Income Nonoperating InvestmentIncomeNonoperating	1456000	USD
CY2016	us-gaap	Adjustment For Amortization AdjustmentForAmortization	86663000	USD
CY2016	us-gaap	Depreciation Depreciation	21003000	USD
CY2016	us-gaap	Interest Expense InterestExpense	39481000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	423499000	USD
CY2016Q4	us-gaap	Assets Assets	5262734000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	17765000	USD
CY2018	us-gaap	Direct Premiums Written DirectPremiumsWritten	619223000	USD
CY2018	us-gaap	Direct Premiums Earned DirectPremiumsEarned	602320000	USD
CY2017	us-gaap	Direct Premiums Written DirectPremiumsWritten	604623000	USD
CY2017	us-gaap	Direct Premiums Earned DirectPremiumsEarned	592267000	USD
CY2018	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	0	USD
CY2018	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	0	USD
CY2017	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	0	USD
CY2017	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	0	USD
CY2018	us-gaap	Ceded Premiums Written CededPremiumsWritten	619206000	USD
CY2018	us-gaap	Ceded Premiums Earned CededPremiumsEarned	602303000	USD
CY2017	us-gaap	Ceded Premiums Written CededPremiumsWritten	604610000	USD
CY2017	us-gaap	Ceded Premiums Earned CededPremiumsEarned	592254000	USD
CY2018	us-gaap	Premiums Written Net PremiumsWrittenNet	17000	USD
CY2018	us-gaap	Premiums Earned Net PremiumsEarnedNet	17000	USD
CY2017	us-gaap	Premiums Written Net PremiumsWrittenNet	13000	USD
CY2017	us-gaap	Premiums Earned Net PremiumsEarnedNet	13000	USD
CY2018Q4	bro	Percentage Of Ceded Premiums PercentageOfCededPremiums	1
CY2018Q4	us-gaap	Reinsurance Recoverables On Unpaid Losses Gross ReinsuranceRecoverablesOnUnpaidLossesGross	65400000	USD
CY2018Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	337900000	USD
CY2017Q4	us-gaap	Reinsurance Recoverables On Unpaid Losses Gross ReinsuranceRecoverablesOnUnpaidLossesGross	477800000	USD
CY2017Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	321000000.0	USD
CY2018	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	200000	USD
CY2017	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	1100000	USD
CY2018Q4	bro	Percentage Of Ceded Premiums PercentageOfCededPremiums	1
CY2018	bro	Number Of Reinsurers NumberOfReinsurers	2	Reinsurer
CY2018Q4	bro	Reserve For Losses And Loss Adjustment Expenses For Reinsurance Liability ReserveForLossesAndLossAdjustmentExpensesForReinsuranceLiability	65400000	USD
CY2017Q4	bro	Reserve For Losses And Loss Adjustment Expenses For Reinsurance Liability ReserveForLossesAndLossAdjustmentExpensesForReinsuranceLiability	477800000	USD
CY2018Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.10
CY2018Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	100000000.0	USD
CY2018Q4	us-gaap	Accelerated Share Repurchases Settlement Payment Or Receipt AcceleratedShareRepurchasesSettlementPaymentOrReceipt	20000000.0	USD
CY2018Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	147500000	USD
	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	13800000	shares
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	477500000	USD

Files In Submission

Name	View Source	Status
0000079282-19-000006-index-headers.html	Edgar Link	pending
0000079282-19-000006-index.html	Edgar Link	pending
0000079282-19-000006.txt	Edgar Link	pending
0000079282-19-000006-xbrl.zip	Edgar Link	pending
bba18.jpg	Edgar Link	pending
bro-20181231.xsd	Edgar Link	pending
bro-20181231x10k.htm	Edgar Link	pending
bro-20181231x10k_htm.xml	Edgar Link	completed
bro-20181231_cal.xml	Edgar Link	unprocessable
bro-20181231_def.xml	Edgar Link	unprocessable
bro-20181231_lab.xml	Edgar Link	unprocessable
bro-20181231_pre.xml	Edgar Link	unprocessable
bro10kstockprice1312019v1.jpg	Edgar Link	pending
exhibit1010q42018.htm	Edgar Link	pending
exhibit101eq42018.htm	Edgar Link	pending
exhibit109q42018.htm	Edgar Link	pending
exhibit21q42018.htm	Edgar Link	pending
exhibit23q42018.htm	Edgar Link	pending
exhibit24q42018.htm	Edgar Link	pending
exhibit311q42018.htm	Edgar Link	pending
exhibit312q42018.htm	Edgar Link	pending
exhibit321q42018.htm	Edgar Link	pending
exhibit322q42018.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R100.htm	Edgar Link	pending
R101.htm	Edgar Link	pending
R102.htm	Edgar Link	pending
R103.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R82.htm	Edgar Link	pending
R83.htm	Edgar Link	pending
R84.htm	Edgar Link	pending
R85.htm	Edgar Link	pending
R86.htm	Edgar Link	pending
R87.htm	Edgar Link	pending
R88.htm	Edgar Link	pending
R89.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
R90.htm	Edgar Link	pending
R91.htm	Edgar Link	pending
R92.htm	Edgar Link	pending
R93.htm	Edgar Link	pending
R94.htm	Edgar Link	pending
R95.htm	Edgar Link	pending
R96.htm	Edgar Link	pending
R97.htm	Edgar Link	pending
R98.htm	Edgar Link	pending
R99.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$BRO
BROWN & BROWN, INC. Stock $bro

2017 Q4 Form 10-K Financial Statement

#000007928219000006 Filed on February 26, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$BRO BROWN & BROWN, INC. Stock $bro

2017 Q4 Form 10-K Financial Statement

#000007928219000006 Filed on February 26, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$BRO
BROWN & BROWN, INC. Stock $bro