Income taxes - Comparison of Income Taxes at Statutory Rate and Company's Effective Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023	Jan. 03, 2021	Dec. 29, 2019
Comparison Of Income Tax Expense At Statutory Rate And Company's Tax Rate Abstract
U.S.	$ (458)	$ (2,033)	$ 4,606
International	17,145	17,095	14,753
Earnings before provision for taxes on income	$ 16,687	$ 15,062	$ 19,359
Tax rates:
U.S. statutory rate	21.00%	21.00%	21.00%	21.00%	35.00%
International operations	(5.20%)	(8.10%)	(5.00%)
U.S. tax settlements	1.00%	(3.00%)	0.00%
U.S. taxes on international income	(2.60%)	(0.30%)	(1.10%)
U.S. state taxes	1.50%	1.00%	0.30%
Tax benefits on share-based compensation	(0.60%)	(0.80%)	(1.40%)
All other	0.60%	1.70%	1.60%
Effective Rate	15.70%	11.50%	15.40%