| sources | | id | "qxieh2" |
|---|
| source_url | "https://www.sec.gov/Archives/edgar/data/776867/000162828026012603/0001628280-26-012603-index.htm" |
|---|
| document_category | "Annual report" |
|---|
| document_type | "Form 10-K" |
|---|
| document_name | "White Mountains Insurance Group 2025 Form 10-K" |
|---|
| variant | "" |
|---|
| file_format | "sec" |
|---|
| tier | null |
|---|
| year | 2025 |
|---|
| period | "FY" |
|---|
| publication_date | "2026-02-27" |
|---|
| language | "English" |
|---|
| archived | null |
|---|
| archive_file | null |
|---|
| notes | "SEC Form 10-K (inline XBRL)." |
|---|
|
| id | "ul2tiw" |
|---|
| source_url | "https://www.sec.gov/Archives/edgar/data/776867/000077686725000003/0000776867-25-000003-index.htm" |
|---|
| document_category | "Annual report" |
|---|
| document_type | "Form 10-K" |
|---|
| document_name | "White Mountains Insurance Group 2024 Form 10-K" |
|---|
| variant | "" |
|---|
| file_format | "sec" |
|---|
| tier | null |
|---|
| year | 2024 |
|---|
| period | "FY" |
|---|
| publication_date | "2025-02-28" |
|---|
| language | "English" |
|---|
| archived | null |
|---|
| archive_file | null |
|---|
| notes | "SEC Form 10-K (inline XBRL)." |
|---|
|
|
|---|