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. 16, 2018	Jun. 17, 2017	Jun. 16, 2018	Jun. 17, 2017
Earnings Per Share [Abstract]
Net income attributable to PepsiCo		$ 1,820	$ 2,105	$ 3,163	$ 3,423
Preferred Stock [Abstract]
Redemption premium		0	0	(2)	(2)
Net income available for PepsiCo common shareholders - Value		$ 1,820	$ 2,105	$ 3,161	$ 3,421
Net income available for PepsiCo common shareholders - Shares	[1]	1,417	1,428	1,418	1,428
Basic net income attributable to PepsiCo per common share (in dollars per share)		$ 1.28	$ 1.47	$ 2.23	$ 2.40
Dilutive Securities [Abstract]
Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities		$ 0	$ 0	$ 0	$ 0
Stock options and RSUs - Shares	[1]	9	12	10	12
ESOP convertible preferred stock - Value		$ 0	$ 0	$ 2	$ 2
ESOP convertible preferred stock - Shares	[1]	0	1	0	1
Diluted shares - Shares	[1]	1,426	1,441	1,428	1,441
Diluted net income attributable to PepsiCo per common share (in dollars per share)		$ 1.28	$ 1.46	$ 2.21	$ 2.38

[1] Weighted-average common shares outstanding (in millions)