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Senior Debt - Senior Debt (Parenthetical) (Detail) | 6 Months Ended
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Jun. 30, 2022
Lazard Group 3.75% Senior Notes [Member] |
Debt Instrument [Line Items] |
Senior notes interest rate | 3.75%
Senior debt maturity date | 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
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
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
Effective interest rates of senior notes | 4.53%

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