Basic and Diluted Net Income Attributable to PepsiCo (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		8 Months Ended
		Sep. 08, 2018	Sep. 09, 2017	Sep. 08, 2018	Sep. 09, 2017
Earnings Per Share [Abstract]
Net income attributable to PepsiCo		$ 2,498	$ 2,144	$ 5,661	$ 5,567
Preferred Stock [Abstract]
Redemption premium		0	(1)	(2)	(3)
Net income available for PepsiCo common shareholders - Value		$ 2,498	$ 2,143	$ 5,659	$ 5,564
Net income available for PepsiCo common shareholders - Shares	[1]	1,414	1,425	1,417	1,427
Basic net income attributable to PepsiCo per common share (in dollars per share)		$ 1.77	$ 1.50	$ 3.99	$ 3.90
Dilutive Securities [Abstract]
Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities		$ 0	$ 0	$ 0	$ 0
Stock options and RSUs - Shares	[1]	10	12	10	12
ESOP convertible preferred stock - Value		$ 0	$ 1	$ 2	$ 3
ESOP convertible preferred stock - Shares	[1]	0	1	0	1
Diluted shares - Shares	[1]	1,424	1,438	1,427	1,440
Diluted net income attributable to PepsiCo per common share (in dollars per share)		$ 1.75	$ 1.49	$ 3.97	$ 3.87

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