v3.26.1
Goodwill - Summary of Changes in the Carrying Amount of Goodwill by Segment (Detail) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Goodwill [Line Items]        
Beginning balance   $ 15,147 [1] $ 17,177 $ 17,177 [1]
Goodwill allocation related to the shift of Canada to International Markets       0
Goodwill impairment $ 0 0 (1,280) (700)
Goodwill reclassified as assets held for sale   (6) (236)  
Translation differences and other   859 (513)  
Ending balance   16,000 [1] 15,147 [1] 17,177
North America [Member]        
Goodwill [Line Items]        
Beginning balance [1]       6,459
Goodwill allocation related to the shift of Canada to International Markets       (6,459)
Goodwill impairment     0  
Goodwill reclassified as assets held for sale   0 0  
Translation differences and other   0 0  
United States [Member]        
Goodwill [Line Items]        
Beginning balance   5,732 [1] 5,813 0 [1]
Goodwill allocation related to the shift of Canada to International Markets       5,813
Goodwill impairment     0  
Goodwill reclassified as assets held for sale   0 (81)  
Translation differences and other   0 0  
Ending balance   5,732 [1] 5,732 [1] 5,813
Europe [Member]        
Goodwill [Line Items]        
Beginning balance   8,075 [1] 8,466 8,466 [1]
Goodwill allocation related to the shift of Canada to International Markets       0
Goodwill impairment     0  
Goodwill reclassified as assets held for sale   0 (98)  
Translation differences and other   737 (293)  
Ending balance   8,812 [1] 8,075 [1] 8,466
International Markets [Member]        
Goodwill [Line Items]        
Beginning balance   1,110 [1] 1,321 675 [1]
Goodwill allocation related to the shift of Canada to International Markets       646
Goodwill impairment     0  
Goodwill reclassified as assets held for sale   (6) (50)  
Translation differences and other   62 (161)  
Ending balance   1,166 [1] 1,110 [1] 1,321
Other [Member] | Tevas API Reporting Unit [Member]        
Goodwill [Line Items]        
Beginning balance   0 [1] 1,313 1,313 [1]
Goodwill allocation related to the shift of Canada to International Markets       0
Goodwill impairment     (1,280)  
Goodwill reclassified as assets held for sale   0 0  
Translation differences and other   0 (33)  
Ending balance   0 [1] 0 [1] 1,313
Other [Member] | Medis Reporting Units [Member]        
Goodwill [Line Items]        
Beginning balance   232 [1] 265 265 [1]
Goodwill allocation related to the shift of Canada to International Markets       0
Goodwill impairment     0  
Goodwill reclassified as assets held for sale   0 (7)  
Translation differences and other   60 (26)  
Ending balance   $ 292 [1] $ 232 [1] $ 265
[1] Cumulative goodwill impairment as of December 31, 2025, 2024 and 2023, was approximately $29.6 billion, $29.6 billion and $28.3 billion, respectively.