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Goodwill and Other Intangibles (Tables)
12 Months Ended
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill Activity by Segment
The following table summarizes goodwill activity by segment:
 
PharmaceuticalAnimal HealthAll OtherTotal
Balance January 1, 2019
$16,162 $1,870 $221 $18,253 
Acquisitions19 1,322 — 1,341 
Impairments— — (162)(162)
Other (1)
— — (7)(7)
Balance December 31, 2019 (2)
16,181 3,192 52 19,425 
Acquisitions742 105  847 
Divestitures  (54)(54)
Other (1)
47 (29)2 20 
Balance December 31, 2020 (2)
$16,970 $3,268 $ $20,238 
(1) Other includes cumulative translation adjustments on goodwill balances and certain other adjustments.
(2) Accumulated goodwill impairment losses were $531 million at both December 31, 2020 and 2019.
Other Intangibles
Other intangibles at December 31 consisted of:
 20202019
  
Gross
Carrying
Amount
Accumulated
Amortization
NetGross
Carrying
Amount
Accumulated
Amortization
Net
Products and product rights$45,087 $39,925 $5,162 $45,947 $38,852 $7,095 
Licenses4,177 1,387 2,790 3,185 824 2,361 
IPR&D3,228  3,228 1,032 — 1,032 
Trade names2,882 352 2,530 2,899 217 2,682 
Other2,223 1,329 894 2,261 1,235 1,026 
 $57,597 $42,993 $14,604 $55,324 $41,128 $14,196