v3.26.1
Goodwill and other intangible assets - Goodwill (Detail) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]    
Balance at the beginning of the year [1] $ 83,074 $ 83,880
Business acquisitions 352 459
Other, including impairments and foreign currency translation (253) (1,265)
Balance at the end of the period [1] $ 83,173 $ 83,074
[1] Net of accumulated goodwill impairments of $13.0 billion as of June 30, 2026 and December 31, 2025 and $11.5 billion as of December 31, 2024.