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. 07, 2019	Sep. 07, 2019	Sep. 08, 2018
Restructuring Cost and Reserve [Line Items]
Cash payments		$ (248)	$ (179)
2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Liability as of December 29, 2018		106
Restructuring Charges	$ 98	282
Cash payments		(133)
Non-cash charges and translation		(91)
Liability as of September 7, 2019	$ 164	$ 164
Net income attributable to PepsiCo per common share	$ 0.06	$ 0.16
Restructuring and Related Cost, Cost Incurred to Date	$ 420	$ 420
Cash payments reported on the cash flow statement in pension and retiree medical contributions		3
2019 Productivity Plan [Member] | Frito Lay North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	16	22
Restructuring and Related Cost, Cost Incurred to Date	53	53
2019 Productivity Plan [Member] | Quaker Foods North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	2	2
Restructuring and Related Cost, Cost Incurred to Date	7	7
2019 Productivity Plan [Member] | PepsiCo Beverages North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	26	42
Restructuring and Related Cost, Cost Incurred to Date	82	82
2019 Productivity Plan [Member] | Latin America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	22	43
Restructuring and Related Cost, Cost Incurred to Date	52	52
2019 Productivity Plan [Member] | Europe Sub-Saharan Africa [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	14	73
Restructuring and Related Cost, Cost Incurred to Date	81	81
2019 Productivity Plan [Member] | Asia, Middle East and North Africa [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	10	63
Restructuring and Related Cost, Cost Incurred to Date	66	66
Corporate Unallocated [Member] | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	3	37
Restructuring and Related Cost, Cost Incurred to Date	44	44
Severance and Other Employee Costs | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Liability as of December 29, 2018		105
Restructuring Charges	65	105
Cash payments		(88)
Non-cash charges and translation		(5)
Liability as of September 7, 2019	117	117
Restructuring and Related Cost, Cost Incurred to Date	242	242
Asset Impairments | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Liability as of December 29, 2018		0
Restructuring Charges	3	87
Cash payments		0
Non-cash charges and translation		(87)
Liability as of September 7, 2019	0	0
Restructuring and Related Cost, Cost Incurred to Date	87	87
Other Costs | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Liability as of December 29, 2018		1
Restructuring Charges	30	90
Cash payments		(45)
Non-cash charges and translation		(1)
Liability as of September 7, 2019	47	47
Restructuring and Related Cost, Cost Incurred to Date	91	91
Cost of sales | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	10	100
Selling, general and administrative expenses | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	83	182
Other pension and retiree medical benefits expense | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	5	0
Restructuring and Related Cost, Cost Incurred to Date	35	35
After-tax amount | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	82	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	93	282
Restructuring and Related Cost, Cost Incurred to Date	$ 385	$ 385