v3.25.0.1
Goodwill and Intangible Assets - Goodwill (Details) - USD ($)
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Changes in the carrying amount of goodwill    
Balance at the beginning of the period $ 32,293,000,000 $ 32,156,000,000
Additions [1] 2,951,000,000  
Foreign currency translation adjustments and other (288,000,000) 137,000,000
Balance at the end of the period 34,956,000,000 32,293,000,000
Accumulated goodwill impairment losses    
Accumulated goodwill impairment losses $ 0 $ 0
[1] Goodwill additions related to the acquisitions of ImmunoGen and Cerevel Therapeutics (see Note 5).