v3.26.3
Segments - Schedule of Revenues by Major Products and Activities (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Product Information [Line Items]        
Revenues $ 4,395 $ 4,480 $ 12,519 $ 12,547
Distribution        
Product Information [Line Items]        
Revenues 421 406 1,252 1,167
United States        
Product Information [Line Items]        
Revenues 1,870 2,090 5,106 5,413
United States | Operating segments        
Product Information [Line Items]        
Revenues 1,870 2,090 5,106 5,413
United States | Generic products (including biosimilars)        
Product Information [Line Items]        
Revenues 718 1,175 1,990 2,984
United States | AJOVY        
Product Information [Line Items]        
Revenues 138 73 341 190
United States | AUSTEDO        
Product Information [Line Items]        
Revenues 727 601 1,963 1,492
United States | BENDEKA and TREANDA        
Product Information [Line Items]        
Revenues 30 35 85 111
United States | COPAXONE        
Product Information [Line Items]        
Revenues 58 62 182 179
United States | UZEDY        
Product Information [Line Items]        
Revenues 85 43 225 136
United States | Other        
Product Information [Line Items]        
Revenues 114 101 321 321
United States | Distribution | Operating segments        
Product Information [Line Items]        
Revenues 0 0 0 0
Europe        
Product Information [Line Items]        
Revenues 1,319 1,235 3,922 3,726
Europe | Operating segments        
Product Information [Line Items]        
Revenues 1,319 1,235 3,922 3,726
Europe | Generic products (including biosimilars)        
Product Information [Line Items]        
Revenues 1,033 982 3,146 3,011
Europe | AJOVY        
Product Information [Line Items]        
Revenues 84 66 238 195
Europe | COPAXONE        
Product Information [Line Items]        
Revenues 38 44 127 135
Europe | Respiratory products        
Product Information [Line Items]        
Revenues 54 52 171 162
Europe | Other        
Product Information [Line Items]        
Revenues 111 91 241 223
Europe | Distribution | Operating segments        
Product Information [Line Items]        
Revenues [1] [1] 1 1
International Markets        
Product Information [Line Items]        
Revenues 592 557 1,666 1,634
International Markets | Operating segments        
Product Information [Line Items]        
Revenues 592 557 1,666 1,634
International Markets | Generic products (including biosimilars)        
Product Information [Line Items]        
Revenues 407 421 1,212 1,298
International Markets | AJOVY        
Product Information [Line Items]        
Revenues 48 30 130 78
International Markets | AUSTEDO        
Product Information [Line Items]        
Revenues 24 17 63 34
International Markets | COPAXONE        
Product Information [Line Items]        
Revenues 8 8 22 25
International Markets | Other        
Product Information [Line Items]        
Revenues 105 82 239 199
International Markets | Distribution | Operating segments        
Product Information [Line Items]        
Revenues $ 20 $ 14 $ 59 $ 36
[1] Represents an amount less than $0.5 million