Identifiable Intangible Assets and Goodwill - Goodwill (Detail) $ in Millions	6 Months Ended
	Jun. 28, 2020 USD ($)
Goodwill [Roll Forward]
Balance, December 31, 2019	$ 58,653	[1]
Other	(204)	[2]
Balance, June 28, 2020	58,449	[1]
Operating Segments [Member] | Biopharma [Member]
Goodwill [Roll Forward]
Balance, December 31, 2019	48,202
Other	(155)	[2]
Balance, June 28, 2020	48,047
Operating Segments [Member] | Upjohn [Member]
Goodwill [Roll Forward]
Balance, December 31, 2019	10,451
Other	(49)	[2]
Balance, June 28, 2020	$ 10,401

[1] Amounts may not add due to rounding.

[2] Primarily represents the impact of foreign exchange.