XML 87 R70.htm IDEA: XBRL DOCUMENT
v3.23.1

Stockholders' Equity and Redeemable Noncontrolling Interests - Schedule of Share Repurchase Authorized by Board of Directors (Detail) | 3 Months Ended
--- | ---
Mar. 31, 2023 USD ($)
Equity, Class of Treasury Stock [Line Items] |
Expiration | Dec. 31, 2024
April, 2021 [Member] |
Equity, Class of Treasury Stock [Line Items] |
Share Repurchase Authorization | $ 300,000,000
Expiration | Dec. 31, 2022
February, 2022 [Member] |
Equity, Class of Treasury Stock [Line Items] |
Share Repurchase Authorization | $ 300,000,000
Expiration | Dec. 31, 2024
July, 2022 [Member] |
Equity, Class of Treasury Stock [Line Items] |
Share Repurchase Authorization | $ 500,000,000
Expiration | Dec. 31, 2024

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_EquityClassOfTreasuryStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Expiration date for the purchase of an entity's own shares under a stock repurchase plan, in the YYYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramExpirationDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=laz_ShareRepurchaseProgramDateAprilTwoThousandAndTwentyOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=laz_ShareRepurchaseProgramDateFebruaryTwoThousandAndTwentyTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=laz_ShareRepurchaseProgramDateJulyTwoThousandAndTwentyTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |