Restructuring, Impairment and Integration Charges Restructuring, Impairment and Integration Charges (Summary of 2019 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)
2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	2,500
Restructuring and Related Cost, Expected Cash Expenditures	1,600
Beginning Balance	149	106
Restructuring and impairment charges	289	370	138
Cash payments for restructuring charges	(255)	(257)
Non-cash charges and translation	(56)	(70)	(32)
Ending Balance	$ 127	$ 149	$ 106
Net income attributable to PepsiCo per common share	$ 0.17	$ 0.21	$ 0.08
Plan to Date through 12/26/2020	$ 797
Cash payments reported on the cash flow statement in pension and retiree medical contributions	$ 2	$ 4
Frito Lay North America [Member] | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	15.00%
Restructuring and impairment charges	$ 83	22	$ 31
Plan to Date through 12/26/2020	$ 136
Quaker Foods North America [Member] | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	1.00%
Restructuring and impairment charges	$ 5	2	5
Plan to Date through 12/26/2020	$ 12
PepsiCo Beverages North America [Member] | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	30.00%
Restructuring and impairment charges	$ 47	51	40
Plan to Date through 12/26/2020	$ 138
Africa, Middle East and South Asia [Member] | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	5.00%
Restructuring and impairment charges	$ 14	38	3
Plan to Date through 12/26/2020	$ 55
Asia Pacific, Australia and New Zealand, and China Region [Member] | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	3.00%
Restructuring and impairment charges	$ 5	47	2
Plan to Date through 12/26/2020	$ 54
Latin America | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	10.00%
Restructuring and impairment charges	$ 31	62	9
Plan to Date through 12/26/2020	$ 102
Europe | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	25.00%
Restructuring and impairment charges	$ 48	99	6
Plan to Date through 12/26/2020	$ 153
Severance and Other Employee Costs | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	65.00%
Beginning Balance	$ 128	105
Restructuring and impairment charges	158	149	137
Cash payments for restructuring charges	(138)	(138)
Non-cash charges and translation	(26)	12	(32)
Ending Balance	122	128	105
Plan to Date through 12/26/2020	$ 444
Asset Impairments | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	15.00%
Beginning Balance	$ 0	0
Restructuring and impairment charges	33	92	0
Cash payments for restructuring charges	0	0
Non-cash charges and translation	(33)	(92)	0
Ending Balance	0	0	0
Plan to Date through 12/26/2020	$ 125
Other Costs | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	20.00%
Beginning Balance	$ 21	1
Restructuring and impairment charges	98	129	1
Cash payments for restructuring charges	(117)	(119)
Non-cash charges and translation	3	10	0
Ending Balance	5	21	1
Plan to Date through 12/26/2020	228
Cost of sales | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges	30	115	3
Selling, general and administrative expenses | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges	239	253	100
Other pension and retiree medical benefits expense | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges	20	2	35
Plan to Date through 12/26/2020	57
After-tax amount | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges	231	303	109
Restructuring, Settlement and Impairment Provisions, less Other pension and retiree medical benefits expense [Member] | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges	269	368	103
Plan to Date through 12/26/2020	$ 740
Corporate | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	11.00%
Restructuring and impairment charges	$ 36	$ 47	$ 7
Plan to Date through 12/26/2020	$ 90