Basic and Diluted Net Income Attributable to PepsiCo (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 19, 2022	Mar. 20, 2021
Preferred Stock [Abstract]
Net Income (Loss) Available to Common Stockholders, Basic	$ 4,261	$ 1,714
Weighted Average Number of Shares Outstanding, Basic	1,383	1,380
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	8	7
Net Income (Loss) Attributable to Parent	$ 4,261	$ 1,714
Earnings Per Share, Basic	$ 3.08	$ 1.24
Dilutive Securities [Abstract]
Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units	$ 0	$ 0
Net Income (Loss) Available to Common Stockholders, Diluted	$ 4,261	$ 1,714
Weighted Average Number of Shares Outstanding, Diluted	1,391	1,387
Earnings Per Share, Diluted	$ 3.06	$ 1.24