Restructuring and Impairment Charges (Summary of 2019 Productivity Plan Charges) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 12, 2021	Jun. 13, 2020	Jun. 12, 2021	Jun. 13, 2020
Restructuring Cost and Reserve [Line Items]
Cash payments			$ (104)	$ (109)
2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Liability as of December 26, 2020			127
Restructuring Charges	$ 34	$ 25	77	$ 63
Cash payments			(104)
Non-cash charges and translation			(7)
Liability as of June 12, 2021	$ 93		$ 93
Net income attributable to PepsiCo per common share	$ (0.02)	$ (0.02)	$ (0.05)	$ (0.04)
Restructuring and Related Cost, Cost Incurred to Date	$ 874		$ 874
2019 Productivity Plan [Member] | Frito Lay North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	3	$ 2	18	$ 7
Restructuring and Related Cost, Cost Incurred to Date	154		154
2019 Productivity Plan [Member] | Quaker Foods North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0	0	0	1
Restructuring and Related Cost, Cost Incurred to Date	12		12
2019 Productivity Plan [Member] | PepsiCo Beverages North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	1	0	5	3
Restructuring and Related Cost, Cost Incurred to Date	143		143
2019 Productivity Plan [Member] | Africa, Middle East and South Asia [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	3	5	4	7
Restructuring and Related Cost, Cost Incurred to Date	59		59
2019 Productivity Plan [Member] | Asia Pacific, Australia and New Zealand, and China Region [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	1	3	1	3
Restructuring and Related Cost, Cost Incurred to Date	55		55
2019 Productivity Plan [Member] | Latin America (Segment)
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	6	4	8	9
Restructuring and Related Cost, Cost Incurred to Date	110		110
2019 Productivity Plan [Member] | Europe (Segment)
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	15	8	26	16
Restructuring and Related Cost, Cost Incurred to Date	179		179
Other than 2019 Productivity Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			0
Corporate Unallocated [Member] | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	6	2	10	10
Restructuring and Related Cost, Cost Incurred to Date	100		100
Severance and Other Employee Costs | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Liability as of December 26, 2020			122
Restructuring Charges	15	2	49	24
Cash payments			(75)
Non-cash charges and translation			(6)
Liability as of June 12, 2021	90		90
Restructuring and Related Cost, Cost Incurred to Date	493		493
Asset Impairments | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Liability as of December 26, 2020			0
Restructuring Charges	1	4	1	5
Cash payments			0
Non-cash charges and translation			(1)
Liability as of June 12, 2021	0		0
Restructuring and Related Cost, Cost Incurred to Date	126		126
Other Costs | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Liability as of December 26, 2020			5
Restructuring Charges	18	19	27	34
Cash payments			(29)
Non-cash charges and translation			0
Liability as of June 12, 2021	3		3
Restructuring and Related Cost, Cost Incurred to Date	255		255
Cost of sales | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	2	1	4	3
Selling, general and administrative expenses | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	33	23	68	53
Other pension and retiree medical benefits (income)/expense (a) | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	(1)	1	5	7
Restructuring and Related Cost, Cost Incurred to Date	62		62
After-tax amount | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	29	21	64	53
Restructuring, Settlement and Impairment Provisions, less Other pension and retiree medical benefits expense [Member] | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	35	$ 24	72	$ 56
Restructuring and Related Cost, Cost Incurred to Date	$ 812		$ 812