Net Income Attributable to PepsiCo per Common Share - Basic And Diluted Net Income Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 25, 2023	Mar. 19, 2022
Earnings Per Share [Abstract]
Earnings Per Share, Basic (in USD per share)	$ 1.40	$ 3.08
Net Income (Loss) Available to Common Stockholders, Basic	$ 1,932	$ 4,261
Weighted Average Number of Shares Outstanding, Basic (in shares)	1,378	1,383
Dilutive Securities [Abstract]
Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units	$ 0	$ 0
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	6	8
Net Income (Loss) Available to Common Stockholders, Diluted	$ 1,932	$ 4,261
Weighted Average Number of Shares Outstanding, Diluted	1,384	1,391
Earnings Per Share, Diluted (in USD per share)	$ 1.40	$ 3.06
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	3