Net Income Attributable to PepsiCo per Common Share (Basic and Diluted Net Income Attributable to PepsiCo per Common Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Earnings Per Share [Abstract]
Net income	$ 7,120	$ 7,314	$ 12,515
Redemption premium	0	0	(2)
Net income available for PepsiCo common shareholders - Value	$ 7,120	$ 7,314	$ 12,513
Net income available for PepsiCo common stockholders - Shares	1,385	1,399	1,415
Basic net income attributable to PepsiCo per common share	$ 5.14	$ 5.23	$ 8.84
Stock options and RSUs - Shares	7	8	10
Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units	$ 0	$ 0	$ 0
ESOP convertible preferred stock - Value	$ 0	$ 0	$ 2
ESOP convertible preferred stock - Shares	0	0	0
Diluted shares - Value	$ 7,120	$ 7,314	$ 12,515
Diluted shares - Shares	1,392	1,407	1,425
Diluted net income attributable to PepsiCo per common share	$ 5.12	$ 5.20	$ 8.78