Basic and Diluted Net Income Attributable to PepsiCo (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 11, 2022	Jun. 12, 2021	Jun. 11, 2022	Jun. 12, 2021
Earnings Per Share [Abstract]
Earnings Per Share, Basic	$ 1.03	$ 1.71	$ 4.11	$ 2.95
Net Income (Loss) Available to Common Stockholders, Basic	$ 1,429	$ 2,358	$ 5,690	$ 4,072
Weighted Average Number of Shares Outstanding, Basic	1,382	1,382	1,383	1,381
Dilutive Securities [Abstract]
Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units	$ 0	$ 0	$ 0	$ 0
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	7	6	7	6
Net Income (Loss) Available to Common Stockholders, Diluted	$ 1,429	$ 2,358	$ 5,690	$ 4,072
Weighted Average Number of Shares Outstanding, Diluted	1,389	1,388	1,390	1,387
Earnings Per Share, Diluted	$ 1.03	$ 1.70	$ 4.09	$ 2.94