$LAZ
Lazard Inc Stock $laz

$laz Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000162828024006659 Filed on February 23, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$785.5M	$825.8M	$2.593B
YoY Change	39.79%	12.83%	-9.17%
Cost Of Revenue		$47.19M	$188.6M
YoY Change		7.05%	-1.54%
Gross Profit		$778.6M	$2.423B
YoY Change		13.2%	-9.05%
Gross Profit Margin		94.29%	93.42%
Selling, General & Admin		$671.1M	$2.219B
YoY Change		11.92%	5.56%
% of Gross Profit		86.2%	91.59%
Research & Development	$44.92M		$189.7M
YoY Change	1.99%		10.46%
% of Gross Profit			7.83%
Depreciation & Amortization	$9.134M	$10.77M	$42.85M
YoY Change	-18.04%	3.01%	1.22%
% of Gross Profit		1.38%	1.77%
Operating Expenses	$44.92M	$690.8M	$189.7M
YoY Change	1.99%	12.39%	10.46%
Operating Profit	$54.56M	$87.79M	-$79.96M
YoY Change	-247.77%	20.03%	-115.47%
Interest Expense	$20.73M	-$80.00K	$77.67M
YoY Change	6.43%		-4.72%
% of Operating Profit	37.99%	-0.09%
Other Income/Expense, Net	$11.91M		$72.67M
YoY Change	-41.35%		62.01%
Pretax Income		$71.90M	-$79.96M
YoY Change		-1.7%	-115.47%
Income Tax	$14.34M	$403.0K	-$22.65M
% Of Pretax Income		0.56%
Net Earnings	$35.76M	$62.04M	-$75.48M
YoY Change	-261.26%	50.02%	-121.11%
Net Earnings / Revenue	4.55%	7.51%	-2.91%
Basic Earnings Per Share	$0.38		-$0.90
Diluted Earnings Per Share	$0.35	$0.69	-$0.90
COMMON SHARES
Basic Shares Outstanding	112.8M shares	112.8M shares	88.99M shares
Diluted Shares Outstanding	99.35M shares		88.99M shares

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments		$1.191B	$1.191B
YoY Change		-40.87%	-40.87%
Cash & Equivalents	$923.2M	$971.3M	$1.191B
Short-Term Investments
Other Short-Term Assets			$233.4M
YoY Change			7.15%
Inventory
Prepaid Expenses
Receivables		$560.6M	$560.6M
Other Receivables		$201.8M	$201.8M
Total Short-Term Assets		$1.953B	$2.187B
YoY Change		-26.76%	-24.2%
LONG-TERM ASSETS
Property, Plant & Equipment	$227.5M	$232.5M	$639.7M
YoY Change	-7.39%	-7.02%	-6.15%
Goodwill	$394.1M	$394.9M
YoY Change	-0.02%	4.68%
Intangibles
YoY Change
Long-Term Investments		$0.00	$702.0M
YoY Change		-100.0%	0.43%
Other Assets		$531.4M	$531.4M
YoY Change		-48.56%	-48.56%
Total Long-Term Assets		$2.683B	$2.449B
YoY Change		-15.8%	-17.48%
TOTAL ASSETS
Total Short-Term Assets		$1.953B	$2.187B
Total Long-Term Assets		$2.683B	$2.449B
Total Assets	$4.587B	$4.636B	$4.636B
YoY Change	0.43%	-20.79%	-20.79%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses		$1.267B	$1.462B
YoY Change		1.38%	1.12%
Deferred Revenue
YoY Change
Short-Term Debt		$448.1M	$448.1M
YoY Change		-51.64%	-51.64%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities		$1.715B	$1.910B
YoY Change		-21.19%	-19.48%
LONG-TERM LIABILITIES
Long-Term Debt		$1.778B	$1.778B
YoY Change		-21.72%	-21.72%
Other Long-Term Liabilities		$657.2M	$323.6M
YoY Change		-9.51%	-21.53%
Total Long-Term Liabilities		$2.435B	$2.101B
YoY Change		-18.76%	-21.69%
TOTAL LIABILITIES
Total Short-Term Liabilities		$1.715B	$1.910B
Total Long-Term Liabilities		$2.435B	$2.101B
Total Liabilities	$4.050B	$4.066B	$4.212B
YoY Change	2.02%	-11.49%	-20.47%
SHAREHOLDERS EQUITY
Retained Earnings	$1.385B	$1.403B
YoY Change	-13.7%	-16.35%
Common Stock	$135.7M	$248.3M
YoY Change	42.18%	46.93%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$392.7M	$423.8M	$423.8M
YoY Change
Total Liabilities & Shareholders Equity	$4.587B	$4.636B	$4.636B
YoY Change	0.43%	-20.79%	-20.79%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$35.76M	$62.04M	-$75.48M
YoY Change	-261.26%	50.02%	-121.11%
Depreciation, Depletion And Amortization	$9.134M	$10.77M	$42.85M
YoY Change	-18.04%	3.01%	1.22%
Cash From Operating Activities	-$89.99M	$341.6M	$164.7M
YoY Change	-78.13%	8.68%	-80.26%
INVESTING ACTIVITIES
Capital Expenditures	$6.619M	$8.792M	$28.30M
YoY Change	43.52%	-64.15%	-42.85%
Acquisitions	$0.00		$10.52M
YoY Change	-100.0%
Other Investing Activities		$138.0K	-$10.03M
YoY Change		-54.15%	-233.68%
Cash From Investing Activities	-$6.607M	-$8.654M	-$38.32M
YoY Change	-56.32%	-64.28%	-32.1%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$102.1M
YoY Change			-85.25%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$98.49M	-150.3M	-$1.571B
YoY Change	-109.18%	-80.76%	13.69%
NET CHANGE
Cash From Operating Activities	-$89.99M	341.6M	$164.7M
Cash From Investing Activities	-$6.607M	-8.654M	-$38.32M
Cash From Financing Activities	$98.49M	-150.3M	-$1.571B
Net Change In Cash	-$20.33M	182.7M	-$1.414B
YoY Change	-98.63%	-137.2%	78.9%
FREE CASH FLOW
Cash From Operating Activities	-$89.99M	$341.6M	$164.7M
Capital Expenditures	$6.619M	$8.792M	$28.30M
Free Cash Flow	-$96.61M	$332.8M	$136.4M
YoY Change	-76.78%	14.84%	-82.62%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	New York
CY2023	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	2515489000	usd
CY2023	us-gaap	Labor And Related Expense LaborAndRelatedExpense	1946010000	usd
CY2022	us-gaap	Labor And Related Expense LaborAndRelatedExpense	1656451000	usd
CY2023	us-gaap	Occupancy Net OccupancyNet	131117000	usd
CY2022	us-gaap	Occupancy Net OccupancyNet	122251000	usd
CY2021	us-gaap	Occupancy Net OccupancyNet	128040000	usd
CY2023	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	99357000	usd
CY2022	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	83103000	usd
CY2021	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	42755000	usd
CY2022	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	171702000	usd
CY2021	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	146765000	usd
CY2021	us-gaap	Professional Fees ProfessionalFees	77702000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-39056000	usd
CY2022	laz	Proceeds From Customer Deposits Net ProceedsFromCustomerDepositsNet	0	usd
CY2021	laz	Proceeds From Customer Deposits Net ProceedsFromCustomerDepositsNet	350868000	usd
CY2023	dei	Trading Symbol TradingSymbol	LAZ
CY2023	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2023	dei	Entity Central Index Key EntityCentralIndexKey	0001311370
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	dei	Amendment Flag AmendmentFlag	false
CY2023Q4	us-gaap	Derivative Liability Statement Of Financial Position Extensible Enumeration DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherLiabilities
CY2022Q4	us-gaap	Derivative Asset Statement Of Financial Position Extensible Enumeration DerivativeAssetStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherAssets
CY2022Q4	us-gaap	Derivative Liability Statement Of Financial Position Extensible Enumeration DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherLiabilities
CY2023	us-gaap	Fair Value Recurring Basis Unobservable Input Reconciliation Liability Gain Loss Statement Of Income Extensible List FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfIncomeExtensibleList	http://fasb.org/us-gaap/2023#OtherIncome
CY2022	us-gaap	Fair Value Recurring Basis Unobservable Input Reconciliation Asset Gain Loss Statement Of Income Extensible List FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList	http://fasb.org/us-gaap/2023#OtherIncome
CY2021	us-gaap	Fair Value Recurring Basis Unobservable Input Reconciliation Liability Gain Loss Statement Of Income Extensible List FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfIncomeExtensibleList	http://fasb.org/us-gaap/2023#OtherIncome
CY2021	us-gaap	Fair Value Recurring Basis Unobservable Input Reconciliation Asset Gain Loss Statement Of Income Extensible List FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList	http://fasb.org/us-gaap/2023#OtherIncome
CY2022	us-gaap	Fair Value Asset Recurring Basis Still Held Unrealized Gain Loss Statement Of Income Extensible List FairValueAssetRecurringBasisStillHeldUnrealizedGainLossStatementOfIncomeExtensibleList	http://fasb.org/us-gaap/2023#OtherIncome
CY2021	us-gaap	Fair Value Asset Recurring Basis Still Held Unrealized Gain Loss Statement Of Income Extensible List FairValueAssetRecurringBasisStillHeldUnrealizedGainLossStatementOfIncomeExtensibleList	http://fasb.org/us-gaap/2023#OtherIncome
CY2023	us-gaap	Fair Value Asset Recurring Basis Still Held Unrealized Gain Loss Statement Of Income Extensible List FairValueAssetRecurringBasisStillHeldUnrealizedGainLossStatementOfIncomeExtensibleList	http://fasb.org/us-gaap/2023#OtherIncome
CY2023	us-gaap	Fair Value Liability Recurring Basis Still Held Unrealized Gain Loss Statement Of Income Extensible List FairValueLiabilityRecurringBasisStillHeldUnrealizedGainLossStatementOfIncomeExtensibleList	http://www.lazard.com/20231231#AmortizationAndOtherAcquisitionRelatedCosts
CY2021	us-gaap	Derivative Gain Loss Statement Of Income Or Comprehensive Income Extensible Enumeration DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherIncome
CY2023	us-gaap	Derivative Gain Loss Statement Of Income Or Comprehensive Income Extensible Enumeration DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherIncome
CY2022	us-gaap	Derivative Gain Loss Statement Of Income Or Comprehensive Income Extensible Enumeration DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherIncome
CY2023	us-gaap	Operating Lease Income Comprehensive Income Extensible List OperatingLeaseIncomeComprehensiveIncomeExtensibleList	http://fasb.org/us-gaap/2023#OtherIncome
CY2023	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost Credit Excluding Service Cost Statement Of Income Or Comprehensive Income Extensible List DefinedBenefitPlanNetPeriodicBenefitCostCreditExcludingServiceCostStatementOfIncomeOrComprehensiveIncomeExtensibleList	http://fasb.org/us-gaap/2023#OtherExpenses
CY2022	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost Credit Excluding Service Cost Statement Of Income Or Comprehensive Income Extensible List DefinedBenefitPlanNetPeriodicBenefitCostCreditExcludingServiceCostStatementOfIncomeOrComprehensiveIncomeExtensibleList	http://fasb.org/us-gaap/2023#OtherExpenses
CY2021	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost Credit Excluding Service Cost Statement Of Income Or Comprehensive Income Extensible List DefinedBenefitPlanNetPeriodicBenefitCostCreditExcludingServiceCostStatementOfIncomeOrComprehensiveIncomeExtensibleList	http://fasb.org/us-gaap/2023#OtherExpenses
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CY2022Q4	us-gaap	Investment Type Extensible Enumeration InvestmentTypeExtensibleEnumeration	http://www.lazard.com/20231231#LazardFundInterestMember
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Document Period End Date DocumentPeriodEndDate	2023-12-31
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity File Number EntityFileNumber	001-32492
CY2023	dei	Entity Registrant Name EntityRegistrantName	LAZARD, INC.
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	98-0437848
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	30 Rockefeller Plaza
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	10112
CY2023	dei	City Area Code CityAreaCode	212
CY2023	dei	Local Phone Number LocalPhoneNumber	632-6000
CY2023	dei	Security12b Title Security12bTitle	Common Stock
CY2023	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2023	dei	Entity Small Business EntitySmallBusiness	false
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
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CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	112766091	shares
CY2023	dei	Auditor Firm AuditorFirmId	34
CY2023	dei	Auditor Name AuditorName	Deloitte & Touche LLP
CY2023	dei	Auditor Location AuditorLocation	New York, New York USA
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	971316000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1234773000	usd
CY2023Q4	laz	Deposits With Banks And Short Term Investments DepositsWithBanksAndShortTermInvestments	219576000	usd
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CY2022Q4	us-gaap	Minority Interest MinorityInterest	118936000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	482187000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	675399000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4635781000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5852561000	usd
CY2023	us-gaap	Interest Income Operating InterestIncomeOperating	42022000	usd
CY2022	us-gaap	Interest Income Operating InterestIncomeOperating	29457000	usd
CY2021	us-gaap	Interest Income Operating InterestIncomeOperating	5551000	usd
CY2023	us-gaap	Other Income OtherIncome	89588000	usd
CY2022	us-gaap	Other Income OtherIncome	40602000	usd
CY2021	us-gaap	Other Income OtherIncome	127171000	usd
CY2023	us-gaap	Revenues Revenues	2593162000	usd
CY2022	us-gaap	Revenues Revenues	2855093000	usd
CY2021	us-gaap	Revenues Revenues	3273816000	usd
CY2023	us-gaap	Interest Expense InterestExpense	77673000	usd
CY2022	us-gaap	Interest Expense InterestExpense	81522000	usd
CY2021	us-gaap	Interest Expense InterestExpense	80768000	usd
CY2022	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	2773571000	usd
CY2021	us-gaap	Revenues Net Of Interest Expense RevenuesNetOfInterestExpense	3193048000	usd
CY2021	us-gaap	Labor And Related Expense LaborAndRelatedExpense	1895859000	usd
CY2023	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	189670000	usd
CY2022	us-gaap	Professional Fees ProfessionalFees	69535000	usd
CY2021	laz	Fund Administration And Outsourced Services Expense FundAdministrationAndOutsourcedServicesExpense	130502000	usd
CY2023	us-gaap	Other Expenses OtherExpenses	72666000	usd
CY2023	us-gaap	Costs And Expenses CostsAndExpenses	2595446000	usd
CY2022	us-gaap	Costs And Expenses CostsAndExpenses	2256723000	usd
CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	-79957000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	516848000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	723848000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-22650000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	124365000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	181303000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	-57307000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	392483000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	542545000	usd
CY2023	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	18172000	usd
CY2022	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	34966000	usd
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	14481000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	-75479000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	357517000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	528064000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	88993985	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	95664129	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	106035808	shares
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	88993985	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	100997674	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	113674699	shares
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.90
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.68
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.90
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.90
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.51
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.63
CY2023	us-gaap	Profit Loss ProfitLoss	-57307000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	392483000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	542545000	usd
CY2023	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	31107000	usd
CY2022	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-64778000	usd
CY2021	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-48099000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax	-1826000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax	-32000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax	-23645000	usd
CY2023	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-7606000	usd
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-5978000	usd
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	13263000	usd
CY2023	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-24510000	usd
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-11413000	usd
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	33315000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Benefit Plan Improvement Tax Effect OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect	2567000	usd
CY2023	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	7751000	usd
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	0	usd
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	0	usd
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	-1521000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	-994000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	-1609000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	5233000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	4152000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	5660000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	5905000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-72007000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	14521000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-51402000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	320476000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	557066000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	18173000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	34966000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	14481000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-69575000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	285510000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	542585000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	-57307000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	392483000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	542545000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	42853000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	42336000	usd
CY2022	laz	Payments From Other Investing Activities PaymentsFromOtherInvestingActivities	7500000	usd
CY2021	laz	Payments From Other Investing Activities PaymentsFromOtherInvestingActivities	0	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-38323000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-56438000	usd
CY2023	laz	Proceeds From Customer Deposits Net ProceedsFromCustomerDepositsNet	0	usd
CY2023	us-gaap	Proceeds From Issuance Initial Public Offering ProceedsFromIssuanceInitialPublicOffering	0	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	38315000	usd
CY2023	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	63552000	usd
CY2022	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	60624000	usd
CY2021	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	74024000	usd
CY2023	laz	Currency Translation Adjustment Reclassification CurrencyTranslationAdjustmentReclassification	1826000	usd
CY2022	laz	Currency Translation Adjustment Reclassification CurrencyTranslationAdjustmentReclassification	32000	usd
CY2021	laz	Currency Translation Adjustment Reclassification CurrencyTranslationAdjustmentReclassification	23645000	usd
CY2023	laz	Amortization Of Deferred Expenses And Sharebased Incentive Compensation AmortizationOfDeferredExpensesAndSharebasedIncentiveCompensation	429523000	usd
CY2022	laz	Amortization Of Deferred Expenses And Sharebased Incentive Compensation AmortizationOfDeferredExpensesAndSharebasedIncentiveCompensation	406242000	usd
CY2021	laz	Amortization Of Deferred Expenses And Sharebased Incentive Compensation AmortizationOfDeferredExpensesAndSharebasedIncentiveCompensation	394114000	usd
CY2023	laz	Amortization And Other Acquisition Related Costs AmortizationAndOtherAcquisitionRelatedCosts	334000	usd
CY2022	laz	Amortization And Other Acquisition Related Costs AmortizationAndOtherAcquisitionRelatedCosts	60000	usd
CY2021	laz	Amortization And Other Acquisition Related Costs AmortizationAndOtherAcquisitionRelatedCosts	60000	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-81068000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	42709000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	90643000	usd
CY2023	laz	Provision Benefit Pursuant To Tax Receivable Agreement ProvisionBenefitPursuantToTaxReceivableAgreement	-43894000	usd
CY2022	laz	Provision Benefit Pursuant To Tax Receivable Agreement ProvisionBenefitPursuantToTaxReceivableAgreement	-1209000	usd
CY2021	laz	Provision Benefit Pursuant To Tax Receivable Agreement ProvisionBenefitPursuantToTaxReceivableAgreement	2199000	usd
CY2023	laz	Impairment Of Equity Method Investments And Other Receivables ImpairmentOfEquityMethodInvestmentsAndOtherReceivables	22981000	usd
CY2022	laz	Impairment Of Equity Method Investments And Other Receivables ImpairmentOfEquityMethodInvestmentsAndOtherReceivables	0	usd
CY2021	laz	Impairment Of Equity Method Investments And Other Receivables ImpairmentOfEquityMethodInvestmentsAndOtherReceivables	0	usd
CY2023	laz	Impairment Of Assets Associated With Cost Saving Initiatives ImpairmentOfAssetsAssociatedWithCostSavingInitiatives	8801000	usd
CY2022	laz	Impairment Of Assets Associated With Cost Saving Initiatives ImpairmentOfAssetsAssociatedWithCostSavingInitiatives	0	usd
CY2021	laz	Impairment Of Assets Associated With Cost Saving Initiatives ImpairmentOfAssetsAssociatedWithCostSavingInitiatives	0	usd
CY2023	laz	Loss On Affiliated Entity Liquidation LossOnAffiliatedEntityLiquidation	17929000	usd
CY2022	laz	Loss On Affiliated Entity Liquidation LossOnAffiliatedEntityLiquidation	0	usd
CY2021	laz	Loss On Affiliated Entity Liquidation LossOnAffiliatedEntityLiquidation	0	usd
CY2023	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	100501000	usd
CY2022	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-140745000	usd
CY2023	us-gaap	Increase Decrease In Financial Instruments Used In Operating Activities IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities	145010000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	33410000	usd
CY2022	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-372619000	usd
CY2021	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	274146000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	164662000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	833984000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	866079000	usd
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	28297000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	49511000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	39698000	usd
CY2023	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	490000	usd
CY2022	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	573000	usd
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	642000	usd
CY2023	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	10516000	usd
CY2022	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	usd
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	usd
CY2023	laz	Payments From Other Investing Activities PaymentsFromOtherInvestingActivities	0	usd
CY2022	us-gaap	Proceeds From Issuance Initial Public Offering ProceedsFromIssuanceInitialPublicOffering	0	usd
CY2021	us-gaap	Proceeds From Issuance Initial Public Offering ProceedsFromIssuanceInitialPublicOffering	575000000	usd
CY2023	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	2077000	usd
CY2022	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	514000	usd
CY2021	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	334000	usd
CY2023	laz	Payments Relating To Customer Deposits Net PaymentsRelatingToCustomerDepositsNet	572025000	usd
CY2022	laz	Payments Relating To Customer Deposits Net PaymentsRelatingToCustomerDepositsNet	373044000	usd
CY2021	laz	Payments Relating To Customer Deposits Net PaymentsRelatingToCustomerDepositsNet	0	usd
CY2023	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	5802000	usd
CY2022	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	32051000	usd
CY2021	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	11398000	usd
CY2023	laz	Payments For Tax Receivable Agreement Obligation PaymentsForTaxReceivableAgreementObligation	32208000	usd
CY2022	laz	Payments For Tax Receivable Agreement Obligation PaymentsForTaxReceivableAgreementObligation	21036000	usd
CY2021	laz	Payments For Tax Receivable Agreement Obligation PaymentsForTaxReceivableAgreementObligation	10215000	usd
CY2023	laz	Payment For Underwriting And Other Fees PaymentForUnderwritingAndOtherFees	0	usd
CY2022	laz	Payment For Underwriting And Other Fees PaymentForUnderwritingAndOtherFees	0	usd
CY2021	laz	Payment For Underwriting And Other Fees PaymentForUnderwritingAndOtherFees	9352000	usd
CY2023	us-gaap	Payments For Repurchase Of Redeemable Noncontrolling Interest PaymentsForRepurchaseOfRedeemableNoncontrollingInterest	585891000	usd
CY2022	us-gaap	Payments For Repurchase Of Redeemable Noncontrolling Interest PaymentsForRepurchaseOfRedeemableNoncontrollingInterest	0	usd
CY2021	us-gaap	Payments For Repurchase Of Redeemable Noncontrolling Interest PaymentsForRepurchaseOfRedeemableNoncontrollingInterest	0	usd
CY2023	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	102051000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	691705000	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	406149000	usd
CY2023	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	173075000	usd
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	181880000	usd
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	195944000	usd
CY2023	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	54529000	usd
CY2022	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	61916000	usd
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	68013000	usd
CY2023	laz	Payments For Consolidated Funds Redemptions PaymentsForConsolidatedFundsRedemptions	35238000	usd
CY2022	laz	Payments For Consolidated Funds Redemptions PaymentsForConsolidatedFundsRedemptions	10020000	usd
CY2021	laz	Payments For Consolidated Funds Redemptions PaymentsForConsolidatedFundsRedemptions	20915000	usd
CY2023	laz	Payments For Other Financing Activities PaymentsForOtherFinancingActivities	12452000	usd
CY2022	laz	Payments For Other Financing Activities PaymentsForOtherFinancingActivities	10897000	usd
CY2021	laz	Payments For Other Financing Activities PaymentsForOtherFinancingActivities	8380000	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1571194000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1382035000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	195836000	usd
CY2023	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	30438000	usd
CY2022	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-186125000	usd
CY2021	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-161672000	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-1414417000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-790614000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	861187000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	2639400000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	3430014000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	2568827000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	1224983000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	2639400000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	3430014000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	971316000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1234773000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1465022000	usd
CY2023Q4	laz	Deposits With Banks And Short Term Investments Fair Value Disclosure DepositsWithBanksAndShortTermInvestmentsFairValueDisclosure	219576000	usd
CY2022Q4	laz	Deposits With Banks And Short Term Investments Fair Value Disclosure DepositsWithBanksAndShortTermInvestmentsFairValueDisclosure	779246000	usd
CY2021Q4	laz	Deposits With Banks And Short Term Investments Fair Value Disclosure DepositsWithBanksAndShortTermInvestmentsFairValueDisclosure	1347544000	usd
CY2023Q4	us-gaap	Restricted Cash RestrictedCash	34091000	usd
CY2022Q4	us-gaap	Restricted Cash RestrictedCash	625381000	usd
CY2021Q4	us-gaap	Restricted Cash RestrictedCash	617448000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	1224983000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	2639400000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	3430014000	usd
CY2023	us-gaap	Interest Paid Net InterestPaidNet	73684000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	77441000	usd
CY2021	us-gaap	Stockholders Equity Other StockholdersEquityOther	3000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1077964000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	77986000	usd
CY2023	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	44230000	usd
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	144312000	usd
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	74095000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	675399000	usd
CY2023	laz	Profit Loss Excluding Redeemable Noncontrolling Interests ProfitLossExcludingRedeemableNoncontrollingInterests	-69288000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	5905000	usd
CY2023	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	250570000	usd
CY2023	us-gaap	Dividends Sharebased Compensation Stock DividendsSharebasedCompensationStock	11600000	usd
CY2023	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.00
CY2023	us-gaap	Dividends Common Stock DividendsCommonStock	173075000	usd
CY2023	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	102051000	usd
CY2023	laz	Tax Expense Benefit From Stock Issued In Connection With Share Based Incentive Compensation TaxExpenseBenefitFromStockIssuedInConnectionWithShareBasedIncentiveCompensation	-253000	usd
CY2023	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-54276000	usd
CY2023	laz	Stock Issued Issuable During Period Value Business Acquisitions Mergers And Amortization StockIssuedIssuableDuringPeriodValueBusinessAcquisitionsMergersAndAmortization	1775000	usd
CY2023	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	0	usd
CY2023	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	3725000	usd
CY2023	laz	Consolidated Variable Interest Entities ConsolidatedVariableInterestEntities	-74164000	usd
CY2023	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-589000	usd
CY2023	laz	Reversal To Net Loss Of Amounts Previously Charged To Additional Paid In Capital And Noncontrolling Interests ReversalToNetLossOfAmountsPreviouslyChargedToAdditionalPaidInCapitalAndNoncontrollingInterests	17929000	usd
CY2023	laz	Reversal Of Deferred Offering Costs Liability ReversalOfDeferredOfferingCostsLiability	20125000	usd
CY2023	us-gaap	Stockholders Equity Other StockholdersEquityOther	748000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	482187000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1077964000	usd
CY2022	laz	Profit Loss Excluding Redeemable Noncontrolling Interests ProfitLossExcludingRedeemableNoncontrollingInterests	378471000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-72007000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	240641000	usd
CY2022	us-gaap	Dividends Sharebased Compensation Stock DividendsSharebasedCompensationStock	10872000	usd
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.94
CY2022	us-gaap	Dividends Common Stock DividendsCommonStock	181880000	usd
CY2022	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	691705000	usd
CY2022	laz	Tax Expense Benefit From Stock Issued In Connection With Share Based Incentive Compensation TaxExpenseBenefitFromStockIssuedInConnectionWithShareBasedIncentiveCompensation	-6441000	usd
CY2022	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-55477000	usd
CY2022	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	31537000	usd
CY2022	laz	Consolidated Variable Interest Entities ConsolidatedVariableInterestEntities	18279000	usd
CY2022	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	5541000	usd
CY2022	us-gaap	Stockholders Equity Other StockholdersEquityOther	2019000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	675399000	usd
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	999433000	usd
CY2021	laz	Profit Loss Excluding Redeemable Noncontrolling Interests ProfitLossExcludingRedeemableNoncontrollingInterests	546210000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	14521000	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	233958000	usd
CY2021	us-gaap	Dividends Sharebased Compensation Stock DividendsSharebasedCompensationStock	8359000	usd
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.88
CY2021	us-gaap	Dividends Common Stock DividendsCommonStock	195944000	usd
CY2021	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	406149000	usd
CY2021	laz	Tax Expense Benefit From Stock Issued In Connection With Share Based Incentive Compensation TaxExpenseBenefitFromStockIssuedInConnectionWithShareBasedIncentiveCompensation	1539000	usd
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-69552000	usd
CY2021	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	0	usd
CY2021	laz	Dividend Equivalents Business Acquisitions DividendEquivalentsBusinessAcquisitions	0	usd
CY2021	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	11064000	usd
CY2021	laz	Consolidated Variable Interest Entities ConsolidatedVariableInterestEntities	18832000	usd
CY2021	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-43919000	usd
CY2023	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2023	laz	Foreign Currency Remeasurement Gains Losses Net Of Gains And Losses From Forward Foreign Currency Exchange Rate Contracts ForeignCurrencyRemeasurementGainsLossesNetOfGainsAndLossesFromForwardForeignCurrencyExchangeRateContracts	-5574000	usd
CY2022	laz	Foreign Currency Remeasurement Gains Losses Net Of Gains And Losses From Forward Foreign Currency Exchange Rate Contracts ForeignCurrencyRemeasurementGainsLossesNetOfGainsAndLossesFromForwardForeignCurrencyExchangeRateContracts	399000	usd
CY2021	laz	Foreign Currency Remeasurement Gains Losses Net Of Gains And Losses From Forward Foreign Currency Exchange Rate Contracts ForeignCurrencyRemeasurementGainsLossesNetOfGainsAndLossesFromForwardForeignCurrencyExchangeRateContracts	-1234000	usd
CY2023	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-top:12pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates—</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of consolidated financial statements in conformity with U.S. GAAP requires the use of management’s estimates. In preparing the consolidated financial statements, management makes estimates and assumptions regarding:</span></div><div style="margin-top:6pt;padding-left:72pt;text-indent:-36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:32.5pt">valuations of assets and liabilities requiring fair value estimates including, but not limited to, investments, derivatives and assumptions used to value pension and other post-retirement plans;</span></div><div style="margin-top:6pt;padding-left:72pt;text-indent:-36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:32.5pt">the assessment of probability with respect to recognizing revenue;</span></div><div style="margin-top:6pt;padding-left:72pt;text-indent:-36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:32.5pt">the discount rate used to measure operating lease right-of-use assets and operating lease liabilities;</span></div><div style="margin-top:6pt;padding-left:72pt;text-indent:-36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:32.5pt">the adequacy of the allowance for credit losses;</span></div><div style="margin-top:6pt;padding-left:72pt;text-indent:-36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:32.5pt">the realization of deferred tax assets and adequacy of tax reserves for uncertain tax positions;</span></div><div style="margin-top:6pt;padding-left:72pt;text-indent:-36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:32.5pt">the measurement of our tax receivable agreement obligation;</span></div><div style="margin-top:6pt;padding-left:72pt;text-indent:-36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:32.5pt">the outcome of litigation;</span></div><div style="margin-top:6pt;padding-left:72pt;text-indent:-36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:32.5pt">the carrying amount of goodwill and other intangible assets;</span></div><div style="margin-top:6pt;padding-left:72pt;text-indent:-36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:32.5pt">the vesting of share-based and other deferred compensation plan awards; and</span></div><div style="margin-top:6pt;padding-left:72pt;text-indent:-36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:32.5pt">other matters that affect the reported amounts and disclosure of contingencies in the consolidated financial statements.</span></div><div style="margin-top:12pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Estimates, by their nature, are based on judgment and available information. Therefore, actual results could differ from those estimates and could have a material impact on the consolidated financial statements.</span></div>
CY2023Q4	laz	Fee Receivable Credit Term FeeReceivableCreditTerm	P60D
CY2023Q4	laz	Fee Receivable Threshold Period Past Due FeeReceivableThresholdPeriodPastDue	P60D
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	42853000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	42336000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	38315000	usd
CY2023Q4	laz	Financing Fee Receivable FinancingFeeReceivable	113929000	usd
CY2022Q4	laz	Financing Fee Receivable FinancingFeeReceivable	97964000	usd
CY2023Q4	laz	Other Fees And Customers And Other Receivables Not Discussed Elsewhere In The Note OtherFeesAndCustomersAndOtherReceivablesNotDiscussedElsewhereInTheNote	561978000	usd
CY2022Q4	laz	Other Fees And Customers And Other Receivables Not Discussed Elsewhere In The Note OtherFeesAndCustomersAndOtherReceivablesNotDiscussedElsewhereInTheNote	425904000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	17738000	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	33957000	usd
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	36649000	usd
CY2023	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	20875000	usd
CY2022	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	4012000	usd
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	3807000	usd
CY2023	laz	Allowance For Doubtful Accounts Receivable Charge Offs Foreign Currency Translation And Other Adjustments AllowanceForDoubtfulAccountsReceivableChargeOffsForeignCurrencyTranslationAndOtherAdjustments	10110000	usd
CY2022	laz	Allowance For Doubtful Accounts Receivable Charge Offs Foreign Currency Translation And Other Adjustments AllowanceForDoubtfulAccountsReceivableChargeOffsForeignCurrencyTranslationAndOtherAdjustments	20231000	usd
CY2021	laz	Allowance For Doubtful Accounts Receivable Charge Offs Foreign Currency Translation And Other Adjustments AllowanceForDoubtfulAccountsReceivableChargeOffsForeignCurrencyTranslationAndOtherAdjustments	6499000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	28503000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	17738000	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	33957000	usd
CY2023Q4	laz	Investments Fair Value Disclosure Excluding Equity Method Investments InvestmentsFairValueDisclosureExcludingEquityMethodInvestments	701964000	usd
CY2022Q4	laz	Investments Fair Value Disclosure Excluding Equity Method Investments InvestmentsFairValueDisclosureExcludingEquityMethodInvestments	683496000	usd
CY2023Q4	us-gaap	Equity Method Investments EquityMethodInvestments	0	usd
CY2022Q4	us-gaap	Equity Method Investments EquityMethodInvestments	15481000	usd
CY2023Q4	us-gaap	Investments Investments	701964000	usd
CY2022Q4	us-gaap	Investments Investments	698977000	usd
CY2023	laz	Net Unrealized Gains Losses On Investments In Equity Securities And Trading Debt Securities NetUnrealizedGainsLossesOnInvestmentsInEquitySecuritiesAndTradingDebtSecurities	54228000	usd
CY2022	laz	Net Unrealized Gains Losses On Investments In Equity Securities And Trading Debt Securities NetUnrealizedGainsLossesOnInvestmentsInEquitySecuritiesAndTradingDebtSecurities	-92793000	usd
CY2021	laz	Net Unrealized Gains Losses On Investments In Equity Securities And Trading Debt Securities NetUnrealizedGainsLossesOnInvestmentsInEquitySecuritiesAndTradingDebtSecurities	14154000	usd
CY2022Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	698050000	usd
CY2022Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	19418000	usd
CY2023	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	54000	usd
CY2023	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	0	usd
CY2023	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales	18789000	usd
CY2023	laz	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Foreign Currency Translation Adjustments FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationAdjustments	83000	usd
CY2023Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	766000	usd
CY2022Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	0	usd
CY2023	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	274000	usd
CY2023	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases	7754000	usd
CY2023	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySales	1445000	usd
CY2023	laz	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Foreign Currency Translation Adjustments FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityForeignCurrencyTranslationAdjustments	0	usd
CY2023Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	6583000	usd
CY2021Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	871000	usd
CY2022	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	99000	usd
CY2022	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	18000000	usd
CY2022	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales	13000	usd
CY2022	laz	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Foreign Currency Translation Adjustments FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationAdjustments	461000	usd
CY2022Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	19418000	usd
CY2020Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	3157000	usd
CY2021	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	155000	usd
CY2021	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	0	usd
CY2021	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales	2356000	usd
CY2021	laz	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Foreign Currency Translation Adjustments FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationAdjustments	-85000	usd
CY2021Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	871000	usd
CY2020Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	0	usd
CY2021	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	0	usd
CY2021	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases	11500000	usd
CY2021	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySales	11500000	usd
CY2021	laz	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Foreign Currency Translation Adjustments FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityForeignCurrencyTranslationAdjustments	0	usd
CY2021Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	0	usd
CY2022	laz	Fair Value Transfers Into Or Out Of Level3 FairValueTransfersIntoOrOutOfLevel3	0	usd
CY2023	laz	Fair Value Transfers Into Or Out Of Level3 FairValueTransfersIntoOrOutOfLevel3	0	usd
CY2021	laz	Fair Value Transfers Into Or Out Of Level3 FairValueTransfersIntoOrOutOfLevel3	0	usd
CY2023Q4	us-gaap	Alternative Investment AlternativeInvestment	92599000	usd
CY2023Q4	us-gaap	Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments	5505000	usd
CY2022Q4	us-gaap	Alternative Investment AlternativeInvestment	64968000	usd
CY2022Q4	us-gaap	Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments	5455000	usd
CY2023Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	3533000	usd
CY2023Q4	us-gaap	Derivative Asset Notional Amount DerivativeAssetNotionalAmount	288113000	usd
CY2023Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	379557000	usd
CY2023Q4	us-gaap	Derivative Liability Notional Amount DerivativeLiabilityNotionalAmount	640734000	usd
CY2023Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	0	usd
CY2023Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	243000	usd
CY2023Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	0	usd
CY2023Q4	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	0	usd
CY2023Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	2789000	usd
CY2023Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	368430000	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	14783000	usd
CY2022Q4	us-gaap	Derivative Asset Notional Amount DerivativeAssetNotionalAmount	325129000	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	327390000	usd
CY2022Q4	us-gaap	Derivative Liability Notional Amount DerivativeLiabilityNotionalAmount	479122000	usd
CY2022Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	0	usd
CY2022Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	0	usd
CY2022Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	0	usd
CY2022Q4	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	0	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	14554000	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	327160000	usd
CY2023	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-61006000	usd
CY2022	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	82084000	usd
CY2021	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-37452000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	647063000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	645182000	usd
CY2023Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	414547000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	395109000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	232516000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	250073000	usd
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	80257000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	78482000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	86232000	usd
CY2023	us-gaap	Variable Lease Cost VariableLeaseCost	23521000	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	21086000	usd
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	21193000	usd
CY2023	us-gaap	Sublease Income SubleaseIncome	934000	usd
CY2022	us-gaap	Sublease Income SubleaseIncome	4969000	usd
CY2021	us-gaap	Sublease Income SubleaseIncome	7303000	usd
CY2023	us-gaap	Lease Cost LeaseCost	102844000	usd
CY2022	us-gaap	Lease Cost LeaseCost	94599000	usd
CY2021	us-gaap	Lease Cost LeaseCost	100122000	usd
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	81737000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	81415000	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	35282000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	34559000	usd
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P9Y
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.039
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.037
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	82321000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	73201000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	64811000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	63334000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	59863000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	221452000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	564982000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	79791000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	485191000	usd
CY2023Q4	laz	Lessee Operating Lease Not Yet Commenced Undiscounted Future Lease Payment LesseeOperatingLeaseNotYetCommencedUndiscountedFutureLeasePayment	119225000	usd
CY2021	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	usd
CY2023	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	929000	usd
CY2022	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-2181000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Lease Not Yet Commenced Term Of Contract1 LesseeOperatingLeaseLeaseNotYetCommencedTermOfContract1	P15Y
CY2023Q4	us-gaap	Property Subject To Or Available For Operating Lease Net PropertySubjectToOrAvailableForOperatingLeaseNet	72921000	usd
CY2023Q4	us-gaap	Property Subject To Or Available For Operating Lease Accumulated Depreciation PropertySubjectToOrAvailableForOperatingLeaseAccumulatedDepreciation	104171000	usd
CY2023	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	6393000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	2758000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	8273000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	8273000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	8273000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	8273000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	24820000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	60670000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	394898000	usd
CY2023Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	30000	usd
CY2022Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	90000	usd
CY2023Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	394928000	usd
CY2022Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	377330000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	377240000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	379421000	usd
CY2020Q4	us-gaap	Goodwill Goodwill	383861000	usd
CY2023	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	16729000	usd
CY2022	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	usd
CY2021	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-4440000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	394898000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	377240000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	379421000	usd
CY2022	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2023	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	60000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	60000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	60000	usd
CY2023Q4	laz	Income And Other Tax Receivables Current IncomeAndOtherTaxReceivablesCurrent	69700000	usd
CY2022Q4	laz	Income And Other Tax Receivables Current IncomeAndOtherTaxReceivablesCurrent	73672000	usd
CY2023Q4	laz	Prepaid Compensation Asset PrepaidCompensationAsset	115972000	usd
CY2022Q4	laz	Prepaid Compensation Asset PrepaidCompensationAsset	112124000	usd
CY2023Q4	laz	Advances And Prepayments AdvancesAndPrepayments	117452000	usd
CY2022Q4	laz	Advances And Prepayments AdvancesAndPrepayments	105717000	usd
CY2023Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	111394000	usd
CY2022Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	103245000	usd
CY2023Q4	us-gaap	Other Assets OtherAssets	414518000	usd
CY2022Q4	us-gaap	Other Assets OtherAssets	394758000	usd
CY2023Q4	us-gaap	Accrued Liabilities Current And Noncurrent AccruedLiabilitiesCurrentAndNoncurrent	195572000	usd
CY2022Q4	us-gaap	Accrued Liabilities Current And Noncurrent AccruedLiabilitiesCurrentAndNoncurrent	196624000	usd
CY2023Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	138056000	usd
CY2022Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	117308000	usd
CY2023Q4	laz	Accrued Employee Benefits AccruedEmployeeBenefits	23829000	usd
CY2022Q4	laz	Accrued Employee Benefits AccruedEmployeeBenefits	30580000	usd
CY2023Q4	laz	Unclaimed Funds Of Subsidiaries UnclaimedFundsOfSubsidiaries	16994000	usd
CY2022Q4	laz	Unclaimed Funds Of Subsidiaries UnclaimedFundsOfSubsidiaries	16435000	usd
CY2023Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	140417000	usd
CY2022Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	137330000	usd
CY2023Q4	us-gaap	Financial Instruments Sold Not Yet Purchased At Fair Value FinancialInstrumentsSoldNotYetPurchasedAtFairValue	4809000	usd
CY2022Q4	us-gaap	Financial Instruments Sold Not Yet Purchased At Fair Value FinancialInstrumentsSoldNotYetPurchasedAtFairValue	4651000	usd
CY2023Q4	laz	Deferred Cost Associated With Ipo Of Special Purpose Acquisition Entity DeferredCostAssociatedWithIPOOfSpecialPurposeAcquisitionEntity	0	usd
CY2023	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	250570000	usd
CY2022Q4	laz	Deferred Cost Associated With Ipo Of Special Purpose Acquisition Entity DeferredCostAssociatedWithIPOOfSpecialPurposeAcquisitionEntity	20125000	usd
CY2023Q4	us-gaap	Other Sundry Liabilities OtherSundryLiabilities	27270000	usd
CY2022Q4	us-gaap	Other Sundry Liabilities OtherSundryLiabilities	16717000	usd
CY2023Q4	us-gaap	Other Liabilities OtherLiabilities	546947000	usd
CY2022Q4	us-gaap	Other Liabilities OtherLiabilities	539770000	usd
CY2023	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	18775000	usd
CY2022Q4	us-gaap	Deferred Revenue DeferredRevenue	18775000	usd
CY2023Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1700000000	usd
CY2023Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	9800000	usd
CY2023Q4	us-gaap	Long Term Debt LongTermDebt	1690200000	usd
CY2022Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1700000000	usd
CY2022Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	12286000	usd
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	1687714000	usd
CY2021	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	9124295	shares
CY2021	laz	Average Price Per Common Share AveragePricePerCommonShare	44.51
CY2022	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	19666798	shares
CY2022	laz	Average Price Per Common Share AveragePricePerCommonShare	35.17
CY2023	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	2782662	shares
CY2023	laz	Average Price Per Common Share AveragePricePerCommonShare	36.67
CY2023Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	200095000	usd
CY2023	us-gaap	Stock Repurchase Program Expiration Date StockRepurchaseProgramExpirationDate	2024-12-31
CY2023Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	15000000	shares
CY2023Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2023	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-1154000	usd
CY2023	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-7059000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	5905000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-76191000	usd
CY2022	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-4184000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-72007000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-14784000	usd
CY2021	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-29305000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	14521000	usd
CY2023	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-7059000	usd
CY2022	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-4184000	usd
CY2021	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-29305000	usd
CY2023	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	18172000	usd
CY2022	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	34966000	usd
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	14481000	usd
CY2023Q4	us-gaap	Minority Interest MinorityInterest	58428000	usd
CY2022Q4	us-gaap	Minority Interest MinorityInterest	118936000	usd
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	240641000	usd
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	233958000	usd
CY2022Q4	laz	Prepaid Compensation Asset PrepaidCompensationAsset	112124000	usd
CY2023	laz	Prepaid Compensation Asset Granted PrepaidCompensationAssetGranted	159981000	usd
CY2023	laz	Prepaid Compensation Asset Settled PrepaidCompensationAssetSettled	0	usd
CY2023	laz	Prepaid Compensation Assets Amortization Including Impact Of Forfeitures PrepaidCompensationAssetsAmortizationIncludingImpactOfForfeitures	156254000	usd
CY2023	laz	Prepaid Compensation Asset Change In Fair Value PrepaidCompensationAssetChangeInFairValue	0	usd
CY2023	laz	Prepaid Compensation Asset Foreign Currency Translation And Other Adjustments PrepaidCompensationAssetForeignCurrencyTranslationAndOtherAdjustments	121000	usd
CY2023Q4	laz	Prepaid Compensation Asset PrepaidCompensationAsset	115972000	usd
CY2023	laz	Amortization Of Awarded Grants Net Of Forfeitures AmortizationOfAwardedGrantsNetOfForfeitures	164357000	usd
CY2022	laz	Amortization Of Awarded Grants Net Of Forfeitures AmortizationOfAwardedGrantsNetOfForfeitures	154878000	usd
CY2021	laz	Amortization Of Awarded Grants Net Of Forfeitures AmortizationOfAwardedGrantsNetOfForfeitures	151604000	usd
CY2023	laz	Compensation Expense Related To Change In Fair Value Of Underlying Investments CompensationExpenseRelatedToChangeInFairValueOfUnderlyingInvestments	41463000	usd
CY2022	laz	Compensation Expense Related To Change In Fair Value Of Underlying Investments CompensationExpenseRelatedToChangeInFairValueOfUnderlyingInvestments	-44261000	usd
CY2021	laz	Compensation Expense Related To Change In Fair Value Of Underlying Investments CompensationExpenseRelatedToChangeInFairValueOfUnderlyingInvestments	35494000	usd
CY2023	us-gaap	Deferred Compensation Arrangement With Individual Allocated Share Based Compensation Expense DeferredCompensationArrangementWithIndividualAllocatedShareBasedCompensationExpense	205820000	usd
CY2022	us-gaap	Deferred Compensation Arrangement With Individual Allocated Share Based Compensation Expense DeferredCompensationArrangementWithIndividualAllocatedShareBasedCompensationExpense	110617000	usd
CY2021	us-gaap	Deferred Compensation Arrangement With Individual Allocated Share Based Compensation Expense DeferredCompensationArrangementWithIndividualAllocatedShareBasedCompensationExpense	187098000	usd
CY2023Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	496451000	usd
CY2022Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	468872000	usd
CY2023Q4	laz	Equity Funds That Are Invested In Funds Managed By The Company EquityFundsThatAreInvestedInFundsManagedByTheCompany	63927000	usd
CY2022Q4	laz	Equity Funds That Are Invested In Funds Managed By The Company EquityFundsThatAreInvestedInFundsManagedByTheCompany	54810000	usd
CY2023	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	22190000	usd
CY2022	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	19692000	usd
CY2021	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	17864000	usd
CY2023	us-gaap	Restructuring Charges RestructuringCharges	200004000	usd
CY2022Q4	us-gaap	Restructuring Reserve RestructuringReserve	0	usd
CY2023	us-gaap	Restructuring Charges RestructuringCharges	200004000	usd
CY2023	us-gaap	Restructuring Reserve Settled Without Cash2 RestructuringReserveSettledWithoutCash2	44416000	usd
CY2023	us-gaap	Payments For Restructuring PaymentsForRestructuring	103290000	usd
CY2023Q4	us-gaap	Restructuring Reserve RestructuringReserve	52298000	usd
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	96000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	2081000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-12772000	usd
CY2023	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	55513000	usd
CY2022	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	73410000	usd
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	100235000	usd
CY2023	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2809000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	6165000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3197000	usd
CY2023	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	58418000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	81656000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	90660000	usd
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-58600000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	31980000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	69633000	usd
CY2023	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-5123000	usd
CY2022	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	3960000	usd
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	6709000	usd
CY2023	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-17345000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	6769000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	14301000	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-81068000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	42709000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	90643000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-22650000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	124365000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	181303000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2023	laz	Effective Income Tax Rate Reconciliation Beat And Gilti Tax EffectiveIncomeTaxRateReconciliationBEATAndGILTITax	0
CY2022	laz	Effective Income Tax Rate Reconciliation Beat And Gilti Tax EffectiveIncomeTaxRateReconciliationBEATAndGILTITax	0
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CY2022	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.040
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.061
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CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.008
CY2023	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.283
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.241
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.250
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CY2022Q4	laz	Gross Deferred Tax Assets Pertaining To Basis Adjustments GrossDeferredTaxAssetsPertainingToBasisAdjustments	131353000	usd
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CY2022Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	11777000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	615000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	341000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	273000	usd
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CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill	43448000	usd
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CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	77617000	usd
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CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	17829000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	836000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	2052000	usd
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CY2023	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	243000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	43000	usd
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CY2021Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	18579000	usd
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CY2023	laz	Weighted Average Number Of Basic Shares Outstanding Adjustment WeightedAverageNumberOfBasicSharesOutstandingAdjustment	2242163	shares
CY2022	laz	Weighted Average Number Of Basic Shares Outstanding Adjustment WeightedAverageNumberOfBasicSharesOutstandingAdjustment	1669466	shares
CY2021	laz	Weighted Average Number Of Basic Shares Outstanding Adjustment WeightedAverageNumberOfBasicSharesOutstandingAdjustment	1869461	shares
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	88993985	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	95664129	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	106035808	shares
CY2023	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
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CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	100997674	shares
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$LAZ
Lazard Inc Stock $laz

2024 Q1 Form 10-K Financial Statement

#000162828024006659 Filed on February 23, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$LAZ Lazard Inc Stock $laz

2024 Q1 Form 10-K Financial Statement

#000162828024006659 Filed on February 23, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$LAZ
Lazard Inc Stock $laz