v3.26.1
Identifiable Intangible Assets - Summary of Identifiable Intangible Assets (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount net of impairment $ 16,923 $ 17,111
Accumulated amortization 13,476 13,330
Net carrying amount 3,447 3,781
Product rights [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount net of impairment 16,140 16,308
Accumulated amortization 13,120 12,990
Net carrying amount 3,020 3,318
Trade names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount net of impairment 591 597
Accumulated amortization 356 340
Net carrying amount 235 257
In process research and development [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount net of impairment 192 206
Accumulated amortization   0
Net carrying amount $ 192 $ 206