v3.25.4
Goodwill and Other Intangibles (Tables)
 12 Months Ended
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)20252024
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)20252024

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 
2027520 
2028479 
2029436 
2030433 
Subsequent years2,334 
 Total future amortization$4,746