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Revenue (Tables) | 6 Months Ended
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Jun. 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 Ended |  | Six Months Ended
|  | June 30, |  | June 30,
(MILLIONS OF DOLLARS) |  | 2025 |  | 2024 |  | 2025 |  | 2024
United States |  | $ | 1,356 |  |  | $ | 1,308 |  |  | $ | 2,539 |  |  | $ | 2,471 |
Australia |  | 83 |  |  | 83 |  |  | 158 |  |  | 156 |
Brazil |  | 93 |  |  | 99 |  |  | 181 |  |  | 200 |
Canada |  | 73 |  |  | 75 |  |  | 140 |  |  | 136 |
Chile |  | 36 |  |  | 31 |  |  | 70 |  |  | 62 |
China |  | 72 |  |  | 68 |  |  | 132 |  |  | 144 |
France |  | 33 |  |  | 34 |  |  | 73 |  |  | 75 |
Germany |  | 58 |  |  | 58 |  |  | 109 |  |  | 109 |
Italy |  | 38 |  |  | 36 |  |  | 67 |  |  | 64 |
Japan |  | 45 |  |  | 39 |  |  | 81 |  |  | 76 |
Mexico |  | 38 |  |  | 46 |  |  | 75 |  |  | 90 |
Spain |  | 37 |  |  | 33 |  |  | 70 |  |  | 65 |
United Kingdom |  | 77 |  |  | 73 |  |  | 154 |  |  | 150 |
Other developed markets |  | 162 |  |  | 138 |  |  | 295 |  |  | 265 |
Other emerging markets |  | 225 |  |  | 222 |  |  | 473 |  |  | 450 |
|  | 2,426 |  |  | 2,343 |  |  | 4,617 |  |  | 4,513 |
Contract manufacturing & human health |  | 34 |  |  | 18 |  |  | 63 |  |  | 38 |
Total Revenue |  | $ | 2,460 |  |  | $ | 2,361 |  |  | $ | 4,680 |  |  | $ | 4,551 |
Revenue from External Customers by Major Species | Revenue by major species
|  | Three Months Ended |  | Six Months Ended
|  | June 30, |  | June 30,
(MILLIONS OF DOLLARS) |  | 2025 |  | 2024 |  | 2025 |  | 2024
U.S. |  |  |  |  |  |  |  |
Companion animal |  | $ | 1,176 |  |  | $ | 1,080 |  |  | $ | 2,149 |  |  | $ | 1,978 |
Livestock |  | 180 |  |  | 228 |  |  | 390 |  |  | 493 |
|  | 1,356 |  |  | 1,308 |  |  | 2,539 |  |  | 2,471 |
International |  |  |  |  |  |  |  |
Companion animal |  | 612 |  |  | 569 |  |  | 1,185 |  |  | 1,121 |
Livestock |  | 458 |  |  | 466 |  |  | 893 |  |  | 921 |
|  | 1,070 |  |  | 1,035 |  |  | 2,078 |  |  | 2,042 |
Total |  |  |  |  |  |  |  |
Companion animal |  | 1,788 |  |  | 1,649 |  |  | 3,334 |  |  | 3,099 |
Livestock |  | 638 |  |  | 694 |  |  | 1,283 |  |  | 1,414 |
Contract manufacturing & human health |  | 34 |  |  | 18 |  |  | 63 |  |  | 38 |
Total Revenue |  | $ | 2,460 |  |  | $ | 2,361 |  |  | $ | 4,680 |  |  | $ | 4,551 |
Revenue from External Customers by Species | Revenue by species
|  | Three Months Ended |  | Six Months Ended
|  | June 30, |  | June 30,
(MILLIONS OF DOLLARS) |  | 2025 |  | 2024 |  | 2025 |  | 2024
Companion Animal: |  |  |  |  |  |  |  |
Dogs and Cats |  | $ | 1,716 |  |  | $ | 1,581 |  |  | $ | 3,197 |  |  | $ | 2,965 |
Horses |  | 72 |  |  | 68 |  |  | 137 |  |  | 134 |
|  | 1,788 |  |  | 1,649 |  |  | 3,334 |  |  | 3,099 |
Livestock: |  |  |  |  |  |  |  |
Cattle |  | 320 |  |  | 350 |  |  | 678 |  |  | 741 |
Swine |  | 119 |  |  | 130 |  |  | 230 |  |  | 257 |
Poultry |  | 103 |  |  | 132 |  |  | 209 |  |  | 271 |
Fish |  | 74 |  |  | 62 |  |  | 127 |  |  | 107 |
Sheep and other |  | 22 |  |  | 20 |  |  | 39 |  |  | 38 |
|  | 638 |  |  | 694 |  |  | 1,283 |  |  | 1,414 |
Contract manufacturing & human health |  | 34 |  |  | 18 |  |  | 63 |  |  | 38 |
Total Revenue |  | $ | 2,460 |  |  | $ | 2,361 |  |  | $ | 4,680 |  |  | $ | 4,551 |
Schedule of Significant Product Revenues | Revenue by major product category
|  | Three Months Ended |  | Six Months Ended
|  | June 30, |  | June 30,
(MILLIONS OF DOLLARS) |  | 2025 |  | 2024 |  | 2025 |  | 2024
Parasiticides |  | $ | 673 |  |  | $ | 600 |  |  | $ | 1,235 |  |  | $ | 1,104 |
Vaccines |  | 504 |  |  | 445 |  |  | 951 |  |  | 897 |
Dermatology |  | 463 |  |  | 418 |  |  | 853 |  |  | 781 |
Anti-infectives |  | 219 |  |  | 264 |  |  | 468 |  |  | 545 |
Pain and sedation |  | 217 |  |  | 221 |  |  | 427 |  |  | 415 |
Other pharmaceutical |  | 172 |  |  | 153 |  |  | 331 |  |  | 309 |
Animal health diagnostics |  | 110 |  |  | 103 |  |  | 213 |  |  | 185 |
Other non-pharmaceutical |  | 63 |  |  | 65 |  |  | 129 |  |  | 126 |
Medicated feed additives |  | 5 |  |  | 74 |  |  | 10 |  |  | 151 |
|  | 2,426 |  |  | 2,343 |  |  | 4,617 |  |  | 4,513 |
Contract manufacturing & human health |  | 34 |  |  | 18 |  |  | 63 |  |  | 38 |
Total Revenue |  | $ | 2,460 |  |  | $ | 2,361 |  |  | $ | 4,680 |  |  | $ | 4,551 |

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- Definition Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-40 + Details
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