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Goodwill | 6 Months Ended
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Jun. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill | NOTE 6 Goodwill The changes in the carrying value of goodwill by reportable segment for the six months ended June 30, 2025 are as follows:
(in millions) |  | Retail |  |  | Programs |  |  | Wholesale Brokerage |  |  | Total |
Balance as of December 31, 2024 |  | $ | 5,436 |  |  | $ | 1,884 |  |  | $ | 650 |  |  | $ | 7,970 |
Goodwill of acquired businesses |  |  | 21 |  |  |  | 24 |  |  |  | 92 |  |  |  | 137 |
Goodwill adjustments during measurement period (1) |  |  | (5 | ) |  |  | — |  |  |  | — |  |  |  | (5 | )
Goodwill disposed of relating to sales of businesses |  |  | (5 | ) |  |  | — |  |  |  | — |  |  |  | (5 | )
Foreign currency translation adjustments during the year |  |  | 218 |  |  |  | 41 |  |  |  | 9 |  |  |  | 268 |
Balance as of June 30, 2025 |  | $ | 5,665 |  |  | $ | 1,949 |  |  | $ | 751 |  |  | $ | 8,365 |
(1) Provisional estimates of fair value of acquired assets and liabilities are established at the time of each acquisition and are subsequently reviewed and finalized within the first year of operations subsequent to the acquisition date to determine the necessity for adjustments to goodwill.

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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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