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Fair value measurements - Summary of Activity Related to Equity Investments (Details) - USD ($) $ in Millions		12 Months Ended
	Aug. 23, 2023	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Equity Investment [Roll Forward]
Other assets, noncurrent		$ 11,414	$ 14,153
Equity securities, FV-NI, gain (loss)		400	400
Kenvue Inc. | Johnson & Johnson
Equity Investment [Roll Forward]
Percentage ownership after transaction	9.50%
Equity securities | Equity Investments with readily determinable value
Equity Investment [Roll Forward]
Marketable securities, noncurrent		451	4,473	$ 576
Equity, fair value adjustment		(17)	(368)
Equity investments, increase (decrease) from acquisition (sale) during period		(4,005)	4,265
Other assets, noncurrent		451	4,473
Equity securities | Equity Investments without readily determinable value
Equity Investment [Roll Forward]
Equity securities without readily determinable fair value, amount		773	696	$ 613
Equity, fair value adjustment		(197)	1
Equity investments, increase (decrease) from acquisition (sale) during period		274	82
Other assets, noncurrent		$ 773	$ 696

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Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(3)(d))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 321
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479536/321-10-50-4

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 321
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479536/321-10-50-3

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Amount of investment in marketable security, classified as noncurrent.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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-Publisher FASB
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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-Publisher FASB
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