Identifiable Intangible Assets and Goodwill - Goodwill (Detail) $ in Millions	3 Months Ended
	Mar. 29, 2020 USD ($)
Goodwill [Roll Forward]
Balance, December 31, 2019	$ 58,653	[1]
Other	(151)	[2]
Balance, March 29, 2020	58,502	[1]
Operating Segments [Member] | Biopharma [Member]
Goodwill [Roll Forward]
Balance, December 31, 2019	48,202
Other	(122)	[2]
Balance, March 29, 2020	48,081
Operating Segments [Member] | Upjohn [Member]
Goodwill [Roll Forward]
Balance, December 31, 2019	10,451
Other	(30)	[2]
Balance, March 29, 2020	$ 10,421

[1] Amounts may not add due to rounding.

[2] Represents the impact of foreign exchange.