Restructuring, Impairment and Integration Charges Restructuring, Impairment and Integration Charges (Summary of 2014 Productivity Plan Charges) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges	$ 289	$ 373	$ 316
Cash payments for restructuring charges	(255)	(350)	(255)
2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Beginning Balance	0	114	226
Restructuring and impairment charges	0	0	170
Cash payments for restructuring charges		(93)	(255)
Non-cash charges and translation		(21)	(27)
Ending Balance		0	$ 114
Net income attributable to PepsiCo per common share			$ 0.10
Plan to Date through 12/26/2020		1,300
Restructuring and Related Cost, Total Cash Expenditures		$ 960
Cash payments reported on the cash flow statement in pension and retiree medical contributions			$ 11
Frito Lay North America [Member] | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges			8
Percent of Total Plan Restructuring Charges		14.00%
Quaker Foods North America [Member] | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges			2
Percent of Total Plan Restructuring Charges		3.00%
PepsiCo Beverages North America [Member] | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges			51
Percent of Total Plan Restructuring Charges		29.00%
Africa, Middle East and South Asia [Member] | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges			15
Percent of Total Plan Restructuring Charges		3.00%
Asia Pacific, Australia and New Zealand, and China Region [Member] | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges			12
Percent of Total Plan Restructuring Charges		3.00%
Europe | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges			53
Percent of Total Plan Restructuring Charges		23.00%
Latin America | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges			30
Percent of Total Plan Restructuring Charges		15.00%
Severance and Other Employee Costs | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Beginning Balance	0	$ 91	212
Restructuring and impairment charges			86
Cash payments for restructuring charges		(77)	(203)
Non-cash charges and translation		(14)	(4)
Ending Balance		$ 0	91
Percent of Total Plan Restructuring Charges		59.00%
Asset Impairments | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Beginning Balance	0	$ 0	0
Restructuring and impairment charges			28
Cash payments for restructuring charges		0	0
Non-cash charges and translation		0	(28)
Ending Balance		$ 0	0
Percent of Total Plan Restructuring Charges		15.00%
Other Costs | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 0	$ 23	14
Restructuring and impairment charges			56
Cash payments for restructuring charges		(16)	(52)
Non-cash charges and translation		(7)	5
Ending Balance		$ 0	23
Percent of Total Plan Restructuring Charges		26.00%
Selling, general and administrative expenses | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges			169
Other pension and retiree medical benefits expense | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges			1
After-tax amount | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges			143
Corporate | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges			$ (1)
Percent of Total Plan Restructuring Charges		10.00%