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Alleghany Corp./DE – ‘8-K’ for 3/1/21 – ‘XML’

On:  Wednesday, 3/3/21, at 4:19pm ET   ·   For:  3/1/21   ·   Accession #:  1193125-21-67625   ·   File #:  1-09371

Previous ‘8-K’:  ‘8-K’ on / for 2/23/21   ·   Next:  ‘8-K’ on / for 3/16/21   ·   Latest:  ‘8-K’ on / for 10/19/22   ·   2 References:   

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  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 3/03/21  Alleghany Corp./DE                8-K:5,8,9   3/01/21   11:160K                                   Donnelley … Solutions/FA

Current Report   —   Form 8-K
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 8-K         Current Report                                      HTML     28K 
 2: EX-99.1     Miscellaneous Exhibit                               HTML     12K 
 7: R1          Document and Entity Information                     HTML     47K 
 9: XML         IDEA XML File -- Filing Summary                      XML     11K 
 6: XML         XBRL Instance -- d122811d8k_htm                      XML     13K 
 8: EXCEL       IDEA Workbook of Financial Reports                  XLSX      6K 
 4: EX-101.LAB  XBRL Labels -- y-20210301_lab                        XML     55K 
 5: EX-101.PRE  XBRL Presentations -- y-20210301_pre                 XML     35K 
 3: EX-101.SCH  XBRL Schema -- y-20210301                            XSD     12K 
10: JSON        XBRL Instance as JSON Data -- MetaLinks               12±    19K 
11: ZIP         XBRL Zipped Folder -- 0001193125-21-067625-xbrl      Zip     12K 


‘XML’   —   IDEA XML File — Filing Summary


This Document is an IDEA XML File.


                                                                                                                                                                                
<?xml version="1.0" encoding="windows-1252"?>
<FilingSummary>
<Version> 3.20.4 </Version>
<ProcessingTime/>
<ReportFormat> html </ReportFormat>
<ContextCount> 1 </ContextCount>
<ElementCount> 95 </ElementCount>
<EntityCount> 1 </EntityCount>
<FootnotesReported> false </FootnotesReported>
<SegmentCount> 0 </SegmentCount>
<ScenarioCount> 0 </ScenarioCount>
<TuplesReported> false </TuplesReported>
<UnitCount> 0 </UnitCount>
<MyReports>
<Report instance="d122811d8k.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R1.htm </HtmlFileName>
<LongName> 100000 - Document - Document and Entity Information </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.alleghany.com//20210301/taxonomy/role/DocumentDocumentAndEntityInformation </Role>
<ShortName> Document and Entity Information </ShortName>
<MenuCategory> Cover </MenuCategory>
<Position> 1 </Position>
</Report>
<Report>
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<LongName> All Reports </LongName>
<ReportType> Book </ReportType>
<ShortName> All Reports </ShortName>
</Report>
</MyReports>
<InputFiles>
<File doctype="8-K" original="d122811d8k.htm"> d122811d8k.htm </File>
<File> d122811dex991.htm </File>
<File> y-20210301.xsd </File>
<File> y-20210301_lab.xml </File>
<File> y-20210301_pre.xml </File>
</InputFiles>
<SupplementalFiles/>
<BaseTaxonomies>
<BaseTaxonomy> http://xbrl.sec.gov/dei/2019-01-31 </BaseTaxonomy>
</BaseTaxonomies>
<HasPresentationLinkbase> true </HasPresentationLinkbase>
<HasCalculationLinkbase> false </HasCalculationLinkbase>
</FilingSummary>


2 Subsequent Filings that Reference this Filing

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 8/11/21  Alleghany Corp./DE                424B2                  1:415K                                   Donnelley … Solutions/FA
 8/10/21  Alleghany Corp./DE                424B5                  1:415K                                   Donnelley … Solutions/FA
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Filing Submission 0001193125-21-067625   –   Alternative Formats (Word / Rich Text, HTML, Plain Text, et al.)

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