v3.25.4

Goodwill and Other Intangibles (Tables) | 12 Months Ended
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Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Changes in the Carrying Amount of Goodwill | Changes in the carrying amount of goodwill are as follows:
(In millions) |  | 2025 |  | 2024
Balance at January 1, |  | $ | 23,306 |  |  | $ | 17,231 |
Goodwill acquired (a) |  | 562 |  |  | 6,407 |
Other adjustments (b) |  | 469 |  |  | (332) |
Balance at December 31, |  | $ | 24,337 |  |  | $ | 23,306 |
(a)Includes $5.2 billion from the acquisition of McGriff in 2024. (b)Primarily reflects the impact of foreign exchange.
Schedule of Finite-lived Intangible Assets | The gross cost and accumulated amortization of other intangible assets at December 31, 2025 and 2024 are as follows:
(In millions) |  | 2025 |  | 2024
|  | Gross Cost |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Cost |  | Accumulated Amortization |  | Net Carrying Amount
Customer relationships (a) |  | $ | 7,091 |  |  | $ | 2,422 |  |  | $ | 4,669 |  |  | $ | 6,650 |  |  | $ | 1,961 |  |  | $ | 4,689 |
Other (a) (b) |  | 476 |  |  | 399 |  |  | 77 |  |  | 476 |  |  | 345 |  |  | 131 |
Other intangible assets |  | $ | 7,567 |  |  | $ | 2,821 |  |  | $ | 4,746 |  |  | $ | 7,126 |  |  | $ | 2,306 |  |  | $ | 4,820 |
(a)Customer relationships and Other include $2.1 billion and $60 million, respectively from the acquisition of McGriff in 2024. (b)Primarily non-compete agreements, trade names and developed technology.
Schedule of Estimated Future Aggregate Amortization Expense | The estimated future aggregate amortization expense is as follows:
For the Years Ended December 31, |  |
(In millions) |  | Estimated Expense
2026 |  | $ | 544 |
2027 |  | 520 |
2028 |  | 479 |
2029 |  | 436 |
2030 |  | 433 |
Subsequent years |  | 2,334 |
Total future amortization |  | $ | 4,746 |

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