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Goodwill - Summary of Changes in the Carrying Amount of Goodwill by Segment (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Goodwill [Line Items]          
Beginning balance   $ 17,177 $ 17,177 [1] $ 17,177 $ 17,633 [1]
Goodwill allocation related to the shift of Canada to International Markets       0  
Goodwill impairment $ (400)   (1,280) (700) (2,045)
Goodwill reclassified as assets held for sale     (236) (30)  
Translation differences     (513) 275  
Ending balance     15,147 [1] 17,177 [1] 17,177
Medis Reporting Units [Member]          
Goodwill [Line Items]          
Beginning balance [1]         249
Goodwill impairment       0  
Goodwill reclassified as assets held for sale       0  
Translation differences       16  
Tevas API Reporting Unit [Member]          
Goodwill [Line Items]          
Beginning balance [1]         1,293
Goodwill impairment       0  
Goodwill reclassified as assets held for sale       0  
Translation differences       20  
North America [Member]          
Goodwill [Line Items]          
Beginning balance   0 6,459 [1] 0 6,450 [1]
Goodwill allocation related to the shift of Canada to International Markets       (6,459)  
Goodwill impairment     0 0  
Goodwill reclassified as assets held for sale     0 0  
Translation differences     0 9  
Ending balance     0 [1] 6,459 [1] 0
Europe [Member]          
Goodwill [Line Items]          
Beginning balance   8,466 8,466 [1] 8,466 8,302 [1]
Goodwill allocation related to the shift of Canada to International Markets       0  
Goodwill impairment     0 0  
Goodwill reclassified as assets held for sale     (98) 0  
Translation differences     (293) 164  
Ending balance     8,075 [1] 8,466 [1] 8,466
International Markets [Member]          
Goodwill [Line Items]          
Beginning balance   1,321 675 [1] 1,321 1,339 [1]
Goodwill allocation related to the shift of Canada to International Markets       646  
Goodwill impairment   (700) 0 (700)  
Goodwill reclassified as assets held for sale     (50) (30)  
Translation differences     (161) 66  
Ending balance     1,110 [1] 675 [1] 1,321
Other [Member] | Medis Reporting Units [Member]          
Goodwill [Line Items]          
Beginning balance   265 265 [1] 265  
Goodwill allocation related to the shift of Canada to International Markets       0  
Goodwill impairment     0    
Goodwill reclassified as assets held for sale     (7)    
Translation differences     (26)    
Ending balance     232 [1] 265 [1] 265
Other [Member] | Tevas API Reporting Unit [Member]          
Goodwill [Line Items]          
Beginning balance   1,313 1,313 [1] 1,313  
Goodwill allocation related to the shift of Canada to International Markets       0  
Goodwill impairment     (1,280)    
Goodwill reclassified as assets held for sale     0    
Translation differences     (33)    
Ending balance     0 [1] 1,313 [1] 1,313
United States [Member]          
Goodwill [Line Items]          
Beginning balance   $ 5,813 0 [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     (81)    
Translation differences     0    
Ending balance     $ 5,732 [1] $ 0 [1] $ 5,813
[1] Cumulative goodwill impairment as of December 31, 2024, December 31, 2023 and December 31, 2022 was approximately $29.55 billion, $28.3 billion and $27.6 billion, respectively.