Basic and Diluted Net Income Attributable to PepsiCo (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		8 Months Ended
	Sep. 05, 2020	Sep. 07, 2019	Sep. 05, 2020	Sep. 07, 2019
Preferred Stock [Abstract]
Net Income (Loss) Available to Common Stockholders, Basic	$ 2,291	$ 2,100	$ 5,275	$ 5,548
Weighted Average Number of Shares Outstanding, Basic	1,384	1,397	1,387	1,401
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	6	8	6	8
Net Income (Loss) Attributable to Parent	$ 2,291	$ 2,100	$ 5,275	$ 5,548
Earnings Per Share, Basic	$ 1.66	$ 1.50	$ 3.80	$ 3.96
Dilutive Securities [Abstract]
Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units	$ 0	$ 0	$ 0	$ 0
Net Income (Loss) Available to Common Stockholders, Diluted	$ 2,291	$ 2,100	$ 5,275	$ 5,548
Weighted Average Number of Shares Outstanding, Diluted	1,390	1,405	1,393	1,409
Earnings Per Share, Diluted	$ 1.65	$ 1.49	$ 3.79	$ 3.94