Consolidated Statements Of Changes In Equity - USD ($) $ in Thousands |
Total |
Total Equity [Member] |
Total Shareholders' Equity [Member] |
Preferred Stock [Member] |
Common Stock [Member] |
Retained Earnings [Member] |
Accumulated Other Comprehensive Loss [Member] |
Noncontrolling Interests [Member] |
Redeemable Noncontrolling Interests [Member] |
|---|---|---|---|---|---|---|---|---|---|
| Balance at Dec. 31, 2022 | $ 13,213,885 | $ 13,151,094 | $ 591,891 | $ 3,493,893 | $ 9,832,804 | $ (767,494) | $ 62,791 | ||
| Balance, redeemable noncontrolling interests at Dec. 31, 2022 | $ 523,154 | ||||||||
| Net Income | $ 537,799 | 533,345 | 488,652 | 488,652 | 0 | 44,693 | 4,454 | ||
| Other comprehensive income (loss) | 157,745 | 157,713 | 157,713 | 0 | 157,713 | 0 | 32 | ||
| Comprehensive Income (Loss) | 695,544 | 691,058 | 646,365 | 44,693 | 4,486 | ||||
| Repurchase of common stock | (81,964) | (81,964) | 0 | 0 | (81,964) | 0 | 0 | 0 | |
| Restricted stock unit awards expensed | 21,698 | 21,698 | 0 | 21,698 | 0 | 0 | 0 | 0 | |
| Adjustment of redeemable noncontrolling interests | 13,473 | 13,473 | 0 | 0 | 13,473 | 0 | 0 | (13,473) | |
| Purchase of noncontrolling interest | (8,619) | (8,619) | 0 | (8,619) | 0 | 0 | 0 | (13,046) | |
| Redemption of Markel CATCo Re noncontrolling interests | (88,997) | (62,646) | 0 | 0 | 0 | 0 | 0 | (62,646) | 0 |
| Other | 2,436 | 2,436 | 0 | 0 | 2,436 | 0 | 0 | (9,238) | |
| Balance at Mar. 31, 2023 | 13,789,321 | 13,744,483 | 591,891 | 3,506,972 | 10,255,401 | (609,781) | 44,838 | ||
| Balance, redeemable noncontrolling interests at Mar. 31, 2023 | 491,883 | ||||||||
| Balance at Dec. 31, 2023 | 15,056,208 | 15,056,208 | 14,983,928 | 591,891 | 3,517,146 | 11,353,101 | (478,210) | 72,280 | |
| Balance, redeemable noncontrolling interests at Dec. 31, 2023 | 469,685 | 469,685 | |||||||
| Net Income | 1,049,182 | 1,040,708 | 1,025,184 | 1,025,184 | 0 | 15,524 | 8,474 | ||
| Other comprehensive income (loss) | (116,739) | (116,799) | (116,799) | 0 | (116,799) | 0 | 60 | ||
| Comprehensive Income (Loss) | 932,443 | 923,909 | 908,385 | 15,524 | 8,534 | ||||
| Repurchase of common stock | (160,882) | (160,882) | 0 | 0 | (160,882) | 0 | 0 | 0 | |
| Restricted stock unit awards expensed | 30,766 | 30,766 | 0 | 30,766 | 0 | 0 | 0 | 0 | |
| Adjustment of redeemable noncontrolling interests | (32,602) | (32,602) | 0 | 0 | (32,602) | 0 | 0 | 32,602 | |
| Redemption of Markel CATCo Re noncontrolling interests | 0 | ||||||||
| Other | 124 | 124 | 0 | 0 | 124 | 0 | 0 | (10,828) | |
| Balance at Mar. 31, 2024 | 15,817,523 | $ 15,817,523 | $ 15,729,719 | $ 591,891 | $ 3,547,912 | $ 12,184,925 | $ (595,009) | $ 87,804 | |
| Balance, redeemable noncontrolling interests at Mar. 31, 2024 | $ 499,993 | $ 499,993 |
| X | ||||||||||
- Definition Redemption of Markel CATCo Re noncontrolling interests No definition available.
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| X | ||||||||||
- Definition Amount of increase to additional paid-in capital (APIC) for recognition of cost for restricted stock unit under share-based payment arrangement. No definition available.
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| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount after tax and reclassification adjustments of other comprehensive income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition As of the reporting date, the carrying amount of noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. The noncontrolling interest holder's ownership (or holders' ownership) may be in the form of common shares (regardless of class), limited partnership units (regardless of class), non-preferential membership interests, or any other form of common equity regardless of investee entity legal form. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of equity (deficit) attributable to parent and noncontrolling interest. Excludes temporary equity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition This element represents movements included in the statement of changes in stockholders' equity which are not separately disclosed or provided for elsewhere in the taxonomy. No definition available.
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| X | ||||||||||
- Definition Value of accretion of temporary equity to its redemption value during the period. No definition available.
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