Common stock, stock option plans and stock compensation agreements - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2023	Jan. 01, 2023
Outstanding Shares
Options outstanding beginning of period (in shares)	118,672
Options granted (in shares)	16,320
Options exercised (in shares)	(12,386)
Options canceled/forfeited (in shares)	(10,368)
Options outstanding end of period (in shares)	112,238
Weighted Average Exercise Price
Options exercise price beginning of period (in dollars per share)	$ 134.95
Options granted, average exercise price (in dollars per share)	162.75
Options exercised, average exercise price (in dollars per share)	109.48
Options canceled/forfeited, average exercise price (in dollars per share)	155.62
Options exercise price end of period (in dollars per share)	$ 139.88
Aggregate intrinsic value	$ 2,239	$ 4,949