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. 15, 2019	Jun. 16, 2018	Jun. 15, 2019	Jun. 16, 2018
Earnings Per Share [Abstract]
Net income attributable to PepsiCo	$ 2,035	$ 1,820	$ 3,448	$ 3,163
Preferred Stock [Abstract]
Redemption premium			0	(2)
Net income available for PepsiCo common shareholders - Value	$ 2,035	$ 1,820	$ 3,448	$ 3,161
Net income available for PepsiCo common shareholders - Shares	1,401	1,417	1,403	1,418
Earnings Per Share, Basic	$ 1.45	$ 1.28	$ 2.46	$ 2.23
Dilutive Securities [Abstract]
Stock options and RSUs - Shares	8	9	8	10
Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units	$ 0	$ 0	$ 0	$ 0
Dilutive Securities, Effect on Basic Earnings Per Share, ESOP Convertible Preferred Stock			$ 0	$ 2
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock			0	0
Net Income (Loss) Available to Common Stockholders, Diluted			$ 3,448	$ 3,163
Weighted Average Number of Shares Outstanding, Diluted	1,409	1,426	1,411	1,428
Earnings Per Share, Diluted	$ 1.44	$ 1.28	$ 2.44	$ 2.21