XML 102 R91.htm IDEA: XBRL DOCUMENT
v3.23.2

COST-SAVING INITIATIVES - Expenses Associated with Cost Savings Initiatives (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2023
Cost Saving initiatives [Line Items] |  |
Restructuring charges | $ 146,705 | $ 167,445
Severance and other employee termination costs (included in "compensation and benefits" expense) |  |
Cost Saving initiatives [Line Items] |  |
Restructuring charges | 136,608 | 157,348
Technology asset impairments (included in "technology and information services") |  |
Cost Saving initiatives [Line Items] |  |
Restructuring charges | 7,385 | 7,385
Other |  |
Cost Saving initiatives [Line Items] |  |
Restructuring charges | 2,712 | 2,712
Operating Segments | Financial Advisory |  |
Cost Saving initiatives [Line Items] |  |
Restructuring charges | 81,876 | 90,653
Operating Segments | Financial Advisory | Severance and other employee termination costs (included in "compensation and benefits" expense) |  |
Cost Saving initiatives [Line Items] |  |
Restructuring charges | 81,266 | 90,043
Operating Segments | Financial Advisory | Technology asset impairments (included in "technology and information services") |  |
Cost Saving initiatives [Line Items] |  |
Restructuring charges | 88 | 88
Operating Segments | Financial Advisory | Other |  |
Cost Saving initiatives [Line Items] |  |
Restructuring charges | 522 | 522
Operating Segments | Asset Management |  |
Cost Saving initiatives [Line Items] |  |
Restructuring charges | 37,110 | 48,345
Operating Segments | Asset Management | Severance and other employee termination costs (included in "compensation and benefits" expense) |  |
Cost Saving initiatives [Line Items] |  |
Restructuring charges | 29,533 | 40,768
Operating Segments | Asset Management | Technology asset impairments (included in "technology and information services") |  |
Cost Saving initiatives [Line Items] |  |
Restructuring charges | 7,297 | 7,297
Operating Segments | Asset Management | Other |  |
Cost Saving initiatives [Line Items] |  |
Restructuring charges | 280 | 280
Corporate |  |
Cost Saving initiatives [Line Items] |  |
Restructuring charges | 27,719 | 28,447
Corporate | Severance and other employee termination costs (included in "compensation and benefits" expense) |  |
Cost Saving initiatives [Line Items] |  |
Restructuring charges | 25,809 | 26,537
Corporate | Technology asset impairments (included in "technology and information services") |  |
Cost Saving initiatives [Line Items] |  |
Restructuring charges | 0 | 0
Corporate | Other |  |
Cost Saving initiatives [Line Items] |  |
Restructuring charges | $ 1,910 | $ 1,910

X
- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479823/420-10-S99-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482047/420-10-45-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479823/420-10-S99-1 + Details
Name: | us-gaap_RestructuringCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482017/420-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482017/420-10-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482017/420-10-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479823/420-10-S99-2 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479823/420-10-S99-2 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(d)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479823/420-10-S99-2 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482017/420-10-50-1 + Details
Name: | us-gaap_RestructuringCostAndReserveLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=laz_SeveranceAndOtherEmployeeTerminationCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=laz_TechnologyAssetImpairmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=us-gaap_OtherRestructuringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=laz_FinancialAdvisorySegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=laz_AssetManagementSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |