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Goodwill | 9 Months Ended
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Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets Disclosure [Text Block] | Goodwill Goodwill The following table presents a roll-forward of Goodwill by segment:
(in millions of U.S. dollars) | North America Commercial P&C Insurance |  | North America Personal P&C Insurance |  | North America Agricultural Insurance |  | Overseas General Insurance |  | Global Reinsurance |  | Life Insurance |  | Chubb Consolidated
Balance at December 31, 2024 | $ | 7,168 |  |  | $ | 2,218 |  |  | $ | 134 |  |  | $ | 5,047 |  |  | $ | 371 |  |  | $ | 4,641 |  |  | $ | 19,579 |
Acquisition of Liberty Mutual's P&C insurance business in Thailand | — |  |  | — |  |  | — |  |  | 183 |  |  | — |  |  | — |  |  | 183 |
Foreign exchange revaluation | 20 |  |  | 7 |  |  | — |  |  | 306 |  |  | — |  |  | 142 |  |  | 475 |
Balance at September 30, 2025 (1) | $ | 7,188 |  |  | $ | 2,225 |  |  | $ | 134 |  |  | $ | 5,536 |  |  | $ | 371 |  |  | $ | 4,783 |  |  | $ | 20,237 |
(1)Includes $460 million attributable to noncontrolling interests.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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