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NONCONTROLLING INTERESTS - Schedule of Activity in Redeemable Noncontrolling Interest (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Activity in redeemable noncontrolling interest |  |  |  |
Beginning balance |  |  | $ 6,977,749,000 |
Net income (loss) attributable to redeemable noncontrolling interest | $ 415,200,000 | $ 450,176,000 | 548,287,000 | $ 919,734,000
Ending balance | 7,469,059,000 |  | 7,469,059,000 |
Variable Interest Entity, Primary Beneficiary |  |  |  |
Activity in redeemable noncontrolling interest |  |  |  |
Beginning balance |  |  | 6,977,749,000 |
Net income (loss) attributable to redeemable noncontrolling interest | 415,200,000 | 450,176,000 | 548,287,000 | 919,734,000
Ending balance | 7,469,059,000 |  | 7,469,059,000 |
DaVinciRe Holdings Ltd. | Variable Interest Entity, Primary Beneficiary |  |  |  |
Activity in redeemable noncontrolling interest |  |  |  |
Beginning balance | 3,210,791,000 | 2,760,164,000 | 3,061,708,000 | 2,541,482,000
Redemption of shares/capital from redeemable noncontrolling interest, net of adjustments | 0 | (25,000,000) | (26,929,000) | (406,849,000)
Sale of shares to redeemable noncontrolling interests, net of adjustments | 0 | 0 | 70,000,000 | 300,007,000
Net income (loss) attributable to redeemable noncontrolling interest | 243,464,000 | 223,288,000 | 349,476,000 | 523,812,000
Ending balance | 3,454,255,000 | 2,958,452,000 | 3,454,255,000 | 2,958,452,000
Medici | Variable Interest Entity, Primary Beneficiary |  |  |  |
Activity in redeemable noncontrolling interest |  |  |  |
Beginning balance | 1,532,990,000 | 1,631,508,000 | 1,646,745,000 | 1,650,229,000
Redemption of shares/capital from redeemable noncontrolling interest, net of adjustments | (7,143,000) | (83,614,000) | (302,672,000) | (311,164,000)
Sale of shares and contribution of capital to/by redeemable noncontrolling interests | 17,895,000 | 15,319,000 | 160,827,000 | 183,040,000
Net income (loss) attributable to redeemable noncontrolling interest | 79,573,000 | 123,497,000 | 133,729,000 | 183,015,000
Dividends on common shares | 0 | (6,190,000) | (15,314,000) | (24,600,000)
Ending balance | 1,623,315,000 | 1,680,520,000 | 1,623,315,000 | 1,680,520,000
Vermeer | Variable Interest Entity, Primary Beneficiary |  |  |  |
Activity in redeemable noncontrolling interest |  |  |  |
Beginning balance | 1,750,202,000 | 1,489,892,000 | 1,799,857,000 | 1,555,297,000
Sale of shares and contribution of capital to/by redeemable noncontrolling interests | 0 | 175,000,000 | 0 | 175,000,000
Net income (loss) attributable to redeemable noncontrolling interest | 70,981,000 | 73,534,000 | 21,326,000 | 183,129,000
Dividends on common shares | 0 | 0 | 0 | (175,000,000)
Ending balance | 1,821,183,000 | 1,738,426,000 | 1,821,183,000 | 1,738,426,000
Fontana | Variable Interest Entity, Primary Beneficiary |  |  |  |
Activity in redeemable noncontrolling interest |  |  |  |
Beginning balance | 549,124,000 | 453,744,000 | 469,439,000 | 353,823,000
Redemption of shares/capital from redeemable noncontrolling interest, net of adjustments | 0 | 0 | (72,044,000) | 0
Sale of shares and contribution of capital to/by redeemable noncontrolling interests | 0 | 0 | 129,155,000 | 100,000,000
Net income (loss) attributable to redeemable noncontrolling interest | 21,182,000 | 29,857,000 | 43,756,000 | 29,778,000
Ending balance | $ 570,306,000 | $ 483,601,000 | $ 570,306,000 | $ 483,601,000

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