| gptkbp:instanceOf | gptkb:public_company 
 | 
                        
                            
                                | gptkbp:annualReport | https://www.markel.com/investor-relations/annual-reports 
 | 
                        
                            
                                | gptkbp:auditedBy | gptkb:KPMG_LLP 
 | 
                        
                            
                                | gptkbp:businessModel | insurance underwriting and investment operations 
 | 
                        
                            
                                | gptkbp:CEO | gptkb:Thomas_S._Gayner Jeremy A. Noble
 
 | 
                        
                            
                                | gptkbp:country | gptkb:United_States 
 | 
                        
                            
                                | gptkbp:CUSIP | 570535104 
 | 
                        
                            
                                | gptkbp:dividendPaying | does not pay regular dividends 
 | 
                        
                            
                                | gptkbp:filingsInclude | https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001096343 
 | 
                        
                            
                                | gptkbp:Fortune500 | No 
 | 
                        
                            
                                | gptkbp:foundedBy | gptkb:Samuel_Markel 
 | 
                        
                            
                                | gptkbp:foundedYear | 1930 
 | 
                        
                            
                                | gptkbp:hasBoardChairman | Steven A. Markel 
 | 
                        
                            
                                | gptkbp:headquartersLocation | gptkb:Glen_Allen,_Virginia,_United_States 
 | 
                        
                            
                                | gptkbp:industry | gptkb:insurance gptkb:market
 
 | 
                        
                            
                                | gptkbp:ISIN | US5705351048 
 | 
                        
                            
                                | gptkbp:listedOn | gptkb:New_York_Stock_Exchange 
 | 
                        
                            
                                | gptkbp:marketCap | over $20 billion (as of 2024) 
 | 
                        
                            
                                | gptkbp:NAICS | 524126 
 | 
                        
                            
                                | gptkbp:name | Markel Group Inc. 
 | 
                        
                            
                                | gptkbp:notableAcquisition | gptkb:State_National_Companies_(2017) Brahmin Leather Works (2023)
 Costa Farms (2022)
 
 | 
                        
                            
                                | gptkbp:numberOfEmployees | over 20,000 (as of 2024) 
 | 
                        
                            
                                | gptkbp:S&P500Component | No 
 | 
                        
                            
                                | gptkbp:SIC | 6331 
 | 
                        
                            
                                | gptkbp:stockExchange | gptkb:NYSE gptkb:stock_market_index
 
 | 
                        
                            
                                | gptkbp:stockSymbol | gptkb:USD gptkb:MKL
 
 | 
                        
                            
                                | gptkbp:subsidiary | gptkb:Markel_Ventures gptkb:State_National_Companies
 AMF Bakery Systems
 Brahmin Leather Works
 CapTech Ventures
 Costa Farms
 Eagle Construction of VA
 Lansing Building Products
 
 | 
                        
                            
                                | gptkbp:website | https://www.markel.com/ 
 | 
                        
                            
                                | gptkbp:主要业务 | reinsurance investment management
 specialty insurance
 
 | 
                        
                            
                                | gptkbp:bfsParent | gptkb:Markel_Corporation 
 | 
                        
                            
                                | gptkbp:bfsLayer | 7 
 | 
                        
                            
                                | https://www.w3.org/2000/01/rdf-schema#label | NYSE: MKL 
 |