Acquisition and Equity-Method Investment - Purchase Price Allocation (Details) - USD ($) $ in Millions		9 Months Ended
		Sep. 29, 2024	Dec. 31, 2023	Dec. 14, 2023
Business Acquisition [Line Items]
Goodwill	[1]	$ 68,570	$ 67,783
Seagen [Member]
Business Acquisition [Line Items]
Working capital, excluding inventories		622		$ 736
Inventories	[2]	3,304		4,195
Property, plant and equipment		290		524
Other noncurrent assets		77		174
Net income tax accounts		(4,790)		(6,123)
Other noncurrent liabilities		(200)		(167)
Total identifiable net assets		27,447		28,108
Goodwill		16,787		16,126
Net assets acquired/total consideration transferred		44,234		44,234
Measurement Period Adjustments
Working capital, excluding inventories	[3]	(114)
Inventories	[2],[3]	(891)
Property, plant and equipment	[3]	(234)
Other noncurrent assets	[3]	(96)
Net income tax accounts	[3]	1,332
Other noncurrent liabilities	[3]	(33)
Total identifiable net assets	[3]	(661)
Goodwill	[3]	661
Net assets acquired/total consideration transferred	[3]	0
Current inventories		1,200
Noncurrent inventories		2,100
Seagen [Member] | IPR&D [Member]
Business Acquisition [Line Items]
Identifiable intangible assets		20,750		20,800
Measurement Period Adjustments
Identifiable intangible assets	[3]	(50)
Seagen [Member] | Developed Technology Rights and Other Intangible Assets [Member]
Business Acquisition [Line Items]
Identifiable intangible assets	[4]	7,395		$ 7,970
Measurement Period Adjustments
Identifiable intangible assets	[3],[4]	(575)
Seagen [Member] | Developed technology rights [Member]
Business Acquisition [Line Items]
Identifiable intangible assets		$ 6,900
Measurement Period Adjustments
Acquired intangible assets, useful life		18 years

[1] All goodwill is assigned within the Biopharma reportable segment. As a result of the organizational changes to the commercial structure within the Biopharma operating segment effective in the first quarter of 2024 (see Note 13A), our goodwill was required to be reallocated amongst impacted reporting units. The allocation of goodwill is a complex process that requires, among other things, that we determine the fair value of each reporting unit under our old and new organizational structure and the portions being transferred. Therefore, we have not yet completed the allocation, but it will be completed in the current year.

[2] As adjusted, comprised of $1.2 billion current inventories and $2.1 billion noncurrent inventories.

[3] The changes in the estimated fair values are primarily to better reflect market participant assumptions about facts and circumstances existing as of the acquisition date. The measurement period adjustments did not result from intervening events subsequent to the acquisition date

[4] As adjusted, comprised mainly of $6.9 billion of finite-lived developed technology rights with an estimated weighted-average life of approximately 18 years