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Identifiable Intangible Assets - Summary of Identifiable Intangible Assets (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount net of impairment	$ 21,361	$ 21,998
Accumulated amortization	11,104	10,766
Net carrying amount	10,256	11,232
Identifiable product rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount net of impairment	19,371	19,663
Accumulated amortization	10,969	10,640
Net carrying amount	8,402	9,023
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount net of impairment	595	600
Accumulated amortization	135	126
Net carrying amount	460	474
In Process Research and Development (IPR&D) [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount net of impairment	1,394	1,735
Net carrying amount	$ 1,394	$ 1,735

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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-Publisher FASB
-Name Accounting Standards Codification
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