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Cover - USD ($)
 12 Months Ended
Dec. 31, 2024
Jan. 31, 2025
Jun. 30, 2024
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-32492    
Entity Registrant Name LAZARD, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 98-0437848    
Entity Address, Address Line One 30 Rockefeller Plaza    
Entity Address, City or Town New York    
Entity Address, State or Province NY    
Entity Address, Postal Zip Code 10112    
City Area Code 212    
Local Phone Number 632-6000    
Title of each class Common Stock    
Trading Symbol LAZ    
Name of each exchange on which registered NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 3,327,261,235
Entity Common Stock, Shares Outstanding   112,766,091  
Documents Incorporated by Reference
Portions of the Registrant’s proxy statement for its 2025 annual meeting of shareholders are incorporated by reference in this Form 10-K in response to Part III Items 10, 11, 12, 13 and 14.
    
Entity Central Index Key 0001311370    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2024    
Amendment Flag false    
Subsidiaries of Lazard Ltd      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   22,866,869