Financial Instruments - Investments - Unrealized Gains and Losses Related to Equity Securities (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 29, 2025	Jun. 30, 2024	Jun. 29, 2025		Jun. 30, 2024
Fair Value Disclosures [Abstract]
Net (gains)/losses recognized during the period on equity securities	[1]	$ (75)	$ 342	$ 295	[2]	$ 317	[2]
Less: Net (gains)/losses recognized during the period on equity securities sold during the period		(10)	(2)	(934)		(216)
Net unrealized (gains)/losses during the reporting period on equity securities still held at the reporting date	[3]	$ (65)	$ 344	$ 1,230		$ 533

[1] Reported in Other (income)/deductions––net. See Note 4.

[2] The net losses in the first six months of 2025 include, among other things, a net loss of $144 million related to our investment in Haleon, composed of unrealized losses of $1.0 billion, partially offset by $900 million in realized gains on the sales of our remaining investment.

[3] Included in net unrealized (gains)/losses are observable price changes on equity securities without readily determinable fair values. As of June 29, 2025, there were cumulative impairments and downward adjustments of $435 million and upward adjustments of $239 million. Impairments, downward and upward adjustments were not material to our operations in the second quarters and first six months of 2025 and 2024.