Restructuring and Impairment Charges Restructuring and Impairment Charges (Summary of 2019 Productivity Plan Charges) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		8 Months Ended
	Sep. 05, 2020	Sep. 07, 2019	Sep. 05, 2020	Sep. 07, 2019
Restructuring Cost and Reserve [Line Items]
Cash payments			$ (166)	$ (248)
Cash payments reported on the cash flow statement in pension and retiree medical contributions			1
2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 2,500		2,500
Restructuring and Related Cost, Expected Cash Expenditures	1,600		1,600
Liability as of December 28, 2019			149
Restructuring Charges	61	$ 98	124	$ 282
Cash payments			(166)
Non-cash charges and translation			(26)
Liability as of September 5, 2020	$ 81		$ 81
Net income attributable to PepsiCo per common share	$ 0.03	$ 0.06	$ 0.07	$ 0.16
Restructuring and Related Cost, Cost Incurred to Date	$ 632		$ 632
2019 Productivity Plan [Member] | Frito Lay North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	11.00%		11.00%
Restructuring Charges	$ 2	$ 16	$ 9	$ 22
Restructuring and Related Cost, Cost Incurred to Date	$ 62		$ 62
2019 Productivity Plan [Member] | Quaker Foods North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	2.00%		2.00%
Restructuring Charges	$ 0	2	$ 1	2
Restructuring and Related Cost, Cost Incurred to Date	$ 8		$ 8
2019 Productivity Plan [Member] | PepsiCo Beverages North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	30.00%		30.00%
Restructuring Charges	$ 29	26	$ 32	42
Restructuring and Related Cost, Cost Incurred to Date	$ 123		$ 123
2019 Productivity Plan [Member] | Latin America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	10.00%		10.00%
Restructuring Charges	$ 5	22	$ 14	43
Restructuring and Related Cost, Cost Incurred to Date	$ 85		$ 85
2019 Productivity Plan [Member] | Europe [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	25.00%		25.00%
Restructuring Charges	$ 13	15	$ 29	74
Restructuring and Related Cost, Cost Incurred to Date	$ 134		$ 134
2019 Productivity Plan [Member] | Africa, Middle East and South Asia [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	8.00%		8.00%
Restructuring Charges	$ 2	5	$ 9	21
Restructuring and Related Cost, Cost Incurred to Date	$ 50		$ 50
2019 Productivity Plan [Member] | Asia Pacific, Australia and New Zealand, and China Region [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	5.00%		5.00%
Restructuring Charges	$ 1	4	$ 4	41
Restructuring and Related Cost, Cost Incurred to Date	$ 53		$ 53
Corporate Unallocated [Member] | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	9.00%		9.00%
Restructuring Charges	$ 8	3	$ 18	37
Restructuring and Related Cost, Cost Incurred to Date	$ 72		$ 72
Severance and Other Employee Costs | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	70.00%		70.00%
Liability as of December 28, 2019			$ 128
Restructuring Charges	$ 23	65	47	105
Cash payments			(92)
Non-cash charges and translation			(10)
Liability as of September 5, 2020	73		73
Restructuring and Related Cost, Cost Incurred to Date	$ 333		$ 333
Asset Impairments | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	15.00%		15.00%
Liability as of December 28, 2019			$ 0
Restructuring Charges	$ 15	3	20	87
Cash payments			0
Non-cash charges and translation			(20)
Liability as of September 5, 2020	0		0
Restructuring and Related Cost, Cost Incurred to Date	$ 112		$ 112
Other Costs | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs	15.00%		15.00%
Liability as of December 28, 2019			$ 21
Restructuring Charges	$ 23	30	57	90
Cash payments			(74)
Non-cash charges and translation			4
Liability as of September 5, 2020	8		8
Restructuring and Related Cost, Cost Incurred to Date	187		187
Cost of sales | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	1	10	4	100
Selling, general and administrative expenses | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	59	83	112	182
Other pension and retiree medical benefits expense | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	1	5	8	0
Restructuring and Related Cost, Cost Incurred to Date	45		45
After-tax amount | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	48	82	101	225
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	60	$ 93	116	$ 282
Restructuring and Related Cost, Cost Incurred to Date	$ 587		$ 587