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Senior Debt - Senior Debt (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Lazard Group 3.75% Senior Notes [Member]
Debt Instrument [Line Items]
Senior notes interest rate	3.75%
Senior debt maturity date	Feb. 13, 2025	Feb. 13, 2025
Effective interest rates of senior notes	3.87%
Lazard Group 3.625% Senior Notes [Member]
Debt Instrument [Line Items]
Senior notes interest rate	3.625%
Senior debt maturity date	Mar. 01, 2027	Mar. 01, 2027
Effective interest rates of senior notes	3.76%
Lazard Group 4.50% Senior Notes [Member]
Debt Instrument [Line Items]
Senior notes interest rate	4.50%
Senior debt maturity date	Sep. 19, 2028	Sep. 19, 2028
Effective interest rates of senior notes	4.67%
Lazard Group 4.375% Senior Notes [Member]
Debt Instrument [Line Items]
Senior notes interest rate	4.375%
Senior debt maturity date	Mar. 11, 2029	Mar. 11, 2029
Effective interest rates of senior notes	4.53%

X

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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