{"cik":11544,"taxonomy":"us-gaap","tag":"StockholdersEquityNoteStockSplitConversionRatio1","label":"Stockholders' Equity Note, Stock Split, Conversion Ratio","description":"Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.","entityName":"W. R. BERKLEY CORP","units":{"pure":[{"end":"2019-04-02","val":0.6667,"accn":"0000011544-20-000016","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-20","frame":"CY2019Q1I"},{"end":"2022-03-23","val":1.5,"accn":"0000011544-22-000016","fy":2021,"fp":"Q1","form":"10-Q","filed":"2022-05-03"},{"end":"2022-03-23","val":1.5,"accn":"0000011544-22-000027","fy":2021,"fp":"Q2","form":"10-Q","filed":"2022-08-02"},{"end":"2022-03-23","val":1.5,"accn":"0000011544-22-000032","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-04"},{"end":"2022-03-23","val":1.5,"accn":"0000011544-23-000008","fy":2022,"fp":"Q1","form":"10-Q","filed":"2023-05-04"},{"end":"2022-03-23","val":1.5,"accn":"0000011544-23-000018","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03","frame":"CY2022Q1I"}]}}