v3.26.1
Identifiable Intangible Assets - Summary of Identifiable Intangible Assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount net of impairment $ 17,111 $ 16,716
Accumulated amortization 13,330 12,298
Net carrying amount 3,781 4,418
Product rights [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount net of impairment 16,308 15,915
Accumulated amortization 12,990 11,998
Net carrying amount 3,318 3,917
Trade names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount net of impairment 597 568
Accumulated amortization 340 300
Net carrying amount 257 268
In process research and development [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount net of impairment 206 233
Accumulated amortization 0 0
Net carrying amount $ 206 $ 233