Document and Entity Information
| Document and Entity Information | Jan. 22, 2022 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001494904 |
| Document Type | 8-K |
| Document Period End Date | Jan. 22, 2022 |
| Entity Registrant Name | GLOBAL INDEMNITY GROUP, LLC |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-34809 |
| Entity Tax Identification Number | 85-2619578 |
| Entity Address, Address Line One | Three Bala Plaza East |
| Entity Address, Address Line Two | Suite 300 |
| Entity Address, City or Town | Bala Cynwyd |
| Entity Address, Country | PA |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19004 |
| City Area Code | (610) |
| Local Phone Number | 664-1500 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Class A Common Shares, no par value |
| Trading Symbol | GBLI |
| Security Exchange Name | NYSE |
| Senior Subordinated Notes [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 7.875% Subordinated Notes due 2047 |
| Trading Symbol | GBLL |
| Security Exchange Name | NYSE |