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Revenue (Tables)
 9 Months Ended
Sep. 30, 2025
Revenue Recognition and Deferred Revenue [Abstract]  
Revenue from External Customers by Geographic Areas
The following tables present our revenue disaggregated by geographic area, species and major product category:
Revenue by geographic area
Three Months EndedNine Months Ended
September 30,September 30,
(MILLIONS OF DOLLARS)2025202420252024
United States$1,322 $1,346 $3,861 $3,817 
Australia87 83 245 239 
Brazil100 101 281 301 
Canada70 66 210 202 
Chile29 31 99 93 
China45 61 177 205 
France40 36 113 111 
Germany62 57 171 166 
Italy35 31 102 95 
Japan34 33 115 109 
Mexico41 39 116 129 
Spain38 35 108 100 
United Kingdom82 80 236 230 
Other developed markets164 148 459 413 
Other emerging markets228 220 701 670 
2,377 2,367 6,994 6,880 
Contract manufacturing & human health23 21 86 59 
Total Revenue$2,400 $2,388 $7,080 $6,939 
Revenue from External Customers by Major Species
Revenue by major species
Three Months EndedNine Months Ended
September 30,September 30,
(MILLIONS OF DOLLARS)2025202420252024
U.S.
Companion animal$1,069 $1,068 $3,218 $3,046 
Livestock253 278 643 771 
1,322 1,346 3,861 3,817 
International
Companion animal583 541 1,768 1,662 
Livestock472 480 1,365 1,401 
1,055 1,021 3,133 3,063 
Total
Companion animal1,652 1,609 4,986 4,708 
Livestock725 758 2,008 2,172 
Contract manufacturing & human health23 21 86 59 
Total Revenue$2,400 $2,388 $7,080 $6,939 
Revenue from External Customers by Species
Revenue by species
Three Months EndedNine Months Ended
September 30,September 30,
(MILLIONS OF DOLLARS)2025202420252024
Companion Animal:
Dogs and Cats$1,586 $1,551 $4,783 $4,516 
Horses66 58 203 192 
1,652 1,609 4,986 4,708 
Livestock:
Cattle399 391 1,077 1,132 
Swine111 131 341 388 
Poultry106 139 315 410 
Fish78 70 205 177 
Sheep and other31 27 70 65 
725 758 2,008 2,172 
Contract manufacturing & human health23 21 86 59 
Total Revenue$2,400 $2,388 $7,080 $6,939 
Schedule of Significant Product Revenues
Revenue by major product category
Three Months EndedNine Months Ended
September 30,September 30,
(MILLIONS OF DOLLARS)2025202420252024
Parasiticides$564 $530 $1,799 $1,634 
Vaccines496 468 1,447 1,365 
Dermatology472 453 1,325 1,234 
Anti-infectives284 274 752 819 
Pain and sedation204 219 631 634 
Other pharmaceutical178 169 509 478 
Animal health diagnostics110 101 323 286 
Other non-pharmaceutical64 62 193 188 
Medicated feed additives5 91 15 242 
2,377 2,367 6,994 6,880 
Contract manufacturing & human health23 21 86 59 
Total Revenue$2,400 $2,388 $7,080 $6,939