Identifiable Intangible Assets and Goodwill - Finite-lived and Indefinite-lived Intangible Assets (Detail) - USD ($) $ in Millions		Jun. 28, 2020	Dec. 31, 2019
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets		$ 7,032	$ 8,983
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount		93,176	91,425
Finite-lived intangible assets, accumulated amortization	[1]	(66,667)	(65,037)
Finite-lived intangible assets, net		26,509	26,387
Intangible assets, gross carrying amount	[1]	100,208	100,408
Finite-lived intangible assets, accumulated amortization	[1]	(66,667)	(65,037)
Identifiable Intangible Assets, less Accumulated Amortization	[1],[2]	33,541	35,370
Brands [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets		1,991	1,991
In Process Research and Development [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	[3]	4,518	5,919
License Agreements and Other [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	[4]	523	1,073
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	[3]	89,927	88,730
Finite-lived intangible assets, accumulated amortization	[3]	(64,683)	(63,106)
Finite-lived intangible assets, net	[3]	25,244	25,625
Finite-lived intangible assets, accumulated amortization	[3]	(64,683)	(63,106)
Brands [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount		922	922
Finite-lived intangible assets, accumulated amortization		(757)	(741)
Finite-lived intangible assets, net		165	181
Finite-lived intangible assets, accumulated amortization		(757)	(741)
License Agreements and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	[4]	2,327	1,772
Finite-lived intangible assets, accumulated amortization	[4]	(1,226)	(1,191)
Finite-lived intangible assets, net	[4]	1,101	582
Finite-lived intangible assets, accumulated amortization	[4]	$ (1,226)	$ (1,191)

[1] The decrease in Identifiable intangible assets, less accumulated amortization, is primarily due to amortization.

[2] Amounts may not add due to rounding.

[3] The changes in the gross carrying amount of Developed technology rights and IPR&D primarily reflect the transfer of $1.4 billion from IPR&D to Developed technology rights to reflect the approval of Braftovi in combination with Erbitux^® (cetuximab), for the treatment of BRAF^V600E-mutant metastatic colorectal cancer after prior therapy.

[4] The changes in the gross carrying amount of Licensing agreements and other primarily reflect the transfer of $550 million from Indefinite-lived Licensing agreements and other to finite-lived Licensing agreements and other to reflect the approval in the U.S. of several products subject to out-licensing arrangements acquired from Array.