Basic and Diluted Net Income Attributable to PepsiCo (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 21, 2015		Mar. 22, 2014
Earnings Per Share [Abstract]
Net income attributable to PepsiCo	$ 1,221		$ 1,216
Preferred Stock [Abstract]
Redemption premium	(1)		(1)
Net income available for PepsiCo common shareholders - Value	1,220		1,215
Net income available for PepsiCo common shareholders - Shares	1,484	[1]	1,524	[1]
Basic net income attributable to PepsiCo per common share (in dollars per share)	$ 0.82		$ 0.80
Dilutive Securities [Abstract]
Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities	0		0
Stock options and RSUs - Shares	18	[1],[2]	15	[1],[2]
ESOP convertible preferred stock - Value	1		1
ESOP convertible preferred stock - Shares	1	[1]	1	[1]
Diluted shares - Value	$ 1,221		$ 1,216
Diluted shares - Shares	1,503	[1]	1,540	[1]
Diluted net income attributable to PepsiCo per common share (in dollars per share)	$ 0.81		$ 0.79
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1.6		0.2
Out-of-the-money options average exercise price	$ 99.25		$ 82.25

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

[2] In the 12 weeks ended March 21, 2015 and March 22, 2014, options to purchase 1.6 million shares and 0.2 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 $99.25 and $82.25 in the 12 weeks ended March 21, 2015 and March 22, 2014, respectively.