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Goodwill | 12 Months Ended
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Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill | NOTE 4 Goodwill The changes in the carrying value of goodwill by reportable segment for the years ended December 31, are as follows:
(in millions) |  | Retail (1) |  |  | Programs (1) |  |  | Wholesale Brokerage |  |  | Total |
Balance as of January 1, 2023 |  | $ | 4,436 |  |  | $ | 1,646 |  |  | $ | 592 |  |  | $ | 6,674 |
Goodwill of acquired businesses |  |  | 335 |  |  |  | 263 |  |  |  | 23 |  |  |  | 621 |
Goodwill adjustment during measurement period (2) |  |  | 13 |  |  |  | (23 | ) |  |  | (2 | ) |  |  | (12 | )
Goodwill disposed of relating to sales of businesses |  |  | — |  |  |  | (47 | ) |  |  | — |  |  |  | (47 | )
Foreign currency translation adjustments during the year |  |  | 86 |  |  |  | 14 |  |  |  | 5 |  |  |  | 105 |
Balance as of December 31, 2023 |  | $ | 4,870 |  |  | $ | 1,853 |  |  | $ | 618 |  |  | $ | 7,341 |
Goodwill of acquired businesses |  |  | 671 |  |  |  | — |  |  |  | 27 |  |  |  | 698 |
Goodwill adjustment during measurement period (2) |  |  | (37 | ) |  |  | 40 |  |  |  | 6 |  |  |  | 9 |
Goodwill disposed of relating to sales of businesses |  |  | (13 | ) |  |  | — |  |  |  | — |  |  |  | (13 | )
Foreign currency translation adjustments during the year |  |  | (55 | ) |  |  | (9 | ) |  |  | (1 | ) |  |  | (65 | )
Balance as of December 31, 2024 |  | $ | 5,436 |  |  | $ | 1,884 |  |  | $ | 650 |  |  | $ | 7,970 |
(1) 2023 balances and activity reflect reclassifications from the former Services segment as a result of our segment realignment in 2024. (2) Provisional estimates of fair value are established at the time of each acquisition and are subsequently reviewed and finalized within the first year of operations subsequent to the acquisition dates. As of December 31, 2024, adjustments were made to the amounts initially recorded. See also Note 3.

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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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