Basic and Diluted Net Income Attributable to PepsiCo (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended
		Mar. 25, 2017	Mar. 19, 2016
Earnings Per Share [Abstract]
Net income attributable to PepsiCo		$ 1,318	$ 931
Preferred Stock [Abstract]
Redemption premium		(2)	(1)
Net income available for PepsiCo common shareholders - Value		$ 1,316	$ 930
Net income available for PepsiCo common shareholders - Shares	[1]	1,428	1,446
Basic net income attributable to PepsiCo per common share (in dollars per share)		$ 0.92	$ 0.64
Dilutive Securities [Abstract]
Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities		$ 0	$ 0
Stock options and RSUs - Shares	[1]	11	12
ESOP convertible preferred stock - Value		$ 2	$ 1
ESOP convertible preferred stock - Shares	[1]	1	1
Diluted shares - Value		$ 1,318	$ 931
Diluted shares - Shares	[1]	1,440	1,459
Diluted net income attributable to PepsiCo per common share (in dollars per share)		$ 0.91	$ 0.64

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