Basic and Diluted Net Income Attributable to PepsiCo (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
Mar. 21, 2020	Mar. 23, 2019
Earnings Per Share [Abstract]
Net income attributable to PepsiCo	$ 1,338	$ 1,413
Preferred Stock [Abstract]
Net income available for PepsiCo common shareholders - Value	$ 1,338	$ 1,413
Net income available for PepsiCo common shareholders - Shares	1,390	1,406
Earnings Per Share, Basic	$ 0.96	$ 1.01
Dilutive Securities [Abstract]
Stock options and RSUs - Shares	6	7
Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units	$ 0	$ 0
Net Income (Loss) Available to Common Stockholders, Diluted	$ 1,338	$ 1,413
Weighted Average Number of Shares Outstanding, Diluted	1,396	1,413
Earnings Per Share, Diluted	$ 0.96	$ 1.00

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