Restructuring and Impairment Charges Restructuring and Impairment Charges (Summary of 2019 Productivity Plan Charges) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 13, 2020	Jun. 15, 2019	Jun. 13, 2020	Jun. 15, 2019
Restructuring Cost and Reserve [Line Items]
Cash payments			$ (109)	$ (153)
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	25	$ 158	63	$ 184
Cash payments			(109)
Non-cash charges and translation			(13)
Liability as of June 13, 2020	$ 90		$ 90
Net income attributable to PepsiCo per common share	$ 0.02	$ 0.08	$ 0.04	$ 0.10
Restructuring and Related Cost, Cost Incurred to Date	$ 571		$ 571
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	$ 6	$ 7	$ 6
Restructuring and Related Cost, Cost Incurred to Date	$ 60		$ 60
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	0	$ 1	0
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	$ 0	10	$ 3	16
Restructuring and Related Cost, Cost Incurred to Date	$ 94		$ 94
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	$ 4	21	$ 9	21
Restructuring and Related Cost, Cost Incurred to Date	$ 80		$ 80
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	$ 8	53	$ 16	59
Restructuring and Related Cost, Cost Incurred to Date	$ 121		$ 121
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	$ 5	8	$ 7	16
Restructuring and Related Cost, Cost Incurred to Date	$ 48		$ 48
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	$ 3	34	$ 3	37
Restructuring and Related Cost, Cost Incurred to Date	$ 52		$ 52
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	$ 2	26	$ 10	34
Restructuring and Related Cost, Cost Incurred to Date	$ 64		$ 64
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	$ 2	43	24	40
Cash payments			(59)
Non-cash charges and translation			(11)
Liability as of June 13, 2020	82		82
Restructuring and Related Cost, Cost Incurred to Date	$ 310		$ 310
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	$ 4	76	5	84
Cash payments			0
Non-cash charges and translation			(5)
Liability as of June 13, 2020	0		0
Restructuring and Related Cost, Cost Incurred to Date	$ 97		$ 97
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	$ 19	39	34	60
Cash payments			(50)
Non-cash charges and translation			3
Liability as of June 13, 2020	8		8
Restructuring and Related Cost, Cost Incurred to Date	164		164
Cost of sales | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	1	82	3	90
Selling, general and administrative expenses | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	23	76	53	99
Other pension and retiree medical benefits expense/(income) (a) | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	1	0	7	(5)
Restructuring and Related Cost, Cost Incurred to Date	44		44
After-tax amount | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	21	120	53	143
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	24	$ 158	56	$ 189
Restructuring and Related Cost, Cost Incurred to Date	$ 527		$ 527