Identifiable Intangible Assets - Goodwill (Detail) $ in Millions	3 Months Ended
	Apr. 03, 2022 USD ($)	[1]
Goodwill [Roll Forward]
Balance, beginning	$ 49,208
Additions	1,023	[2]
Other	(21)	[3]
Balance, ending	$ 50,211

[1] All goodwill is assigned within the Biopharma reportable segment.

[2] Additions relate to our acquisition of Arena. See Note 2A.

[3] Other represents the impact of foreign exchange.