Basic and Diluted Net Income Attributable to PepsiCo (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended
		Mar. 19, 2016	Mar. 21, 2015
Earnings Per Share [Abstract]
Net income attributable to PepsiCo		$ 931	$ 1,221
Preferred Stock [Abstract]
Redemption premium		(1)	(1)
Net income available for PepsiCo common shareholders - Value		$ 930	$ 1,220
Net income available for PepsiCo common shareholders - Shares	[1]	1,446.0	1,484.0
Basic net income attributable to PepsiCo per common share (in dollars per share)		$ 0.64	$ 0.82
Dilutive Securities [Abstract]
Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities		$ 0	$ 0
Stock options and RSUs - Shares	[1],[2]	12.0	18.0
ESOP convertible preferred stock - Value		$ 1	$ 1
ESOP convertible preferred stock - Shares	[1]	1.0	1.0
Diluted shares - Value		$ 931	$ 1,221
Diluted shares - Shares	[1]	1,459.0	1,503.0
Diluted net income attributable to PepsiCo per common share (in dollars per share)		$ 0.64	$ 0.81
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		2.9	1.6
Out-of-the-money options average exercise price		$ 98.99	$ 99.25

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

[2] For the 12 weeks ended March 19, 2016 and March 21, 2015, options to purchase 2.9 million shares and 1.6 million shares, respectively, were not included in the calculation of diluted earnings per common share because these options were out-of-the-money. These out-of-the-money options had average exercise prices of $98.99 and $99.25 for the 12 weeks ended March 19, 2016 and March 21, 2015, respectively.