Restructuring, Impairment and Integration Charges Restructuring, Impairment and Integration Charges (Summary of 2019 Productivity Plan Charges) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended						4 Months Ended		12 Months Ended
	Sep. 07, 2019	Jun. 15, 2019	Mar. 23, 2019	Sep. 08, 2018	Jun. 16, 2018	Mar. 24, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges	$ 98	$ 158	$ 26	$ 35	$ 32	$ 12	$ 88	$ 229	$ 373	$ 316	$ 311
Cash payments for restructuring charges									(350)	(255)	(113)
2019 Productivity Plan
Total 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
Beginning Balance			106						106
Restructuring and impairment charges									370	138	$ 0
Cash payments for restructuring charges									(257)
Non-cash charges and translation									(70)	(32)
Ending Balance							149	106	$ 149	$ 106
Net income attributable to PepsiCo per common share									$ 0.21	$ 0.08
Plan to Date through 12/28/2019							$ 508		$ 508
Cash payments reported on the cash flow statement in pension and retiree medical contributions									$ 4
Frito Lay North America [Member] | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs							11.00%		11.00%
Restructuring and impairment charges									$ 22	$ 31
Plan to Date through 12/28/2019							$ 53		$ 53
Quaker Foods North America [Member] | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs							2.00%		2.00%
Restructuring and impairment charges									$ 2	5
Plan to Date through 12/28/2019							$ 7		$ 7
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%		30.00%
Restructuring and impairment charges									$ 51	40
Plan to Date through 12/28/2019							$ 91		$ 91
Latin America [Member] | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs							10.00%		10.00%
Restructuring and impairment charges									$ 62	9
Plan to Date through 12/28/2019							$ 71		$ 71
Europe [Member] | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs							25.00%		25.00%
Restructuring and impairment charges									$ 99	6
Plan to Date through 12/28/2019							$ 105		$ 105
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							8.00%		8.00%
Restructuring and impairment charges									$ 38	3
Plan to Date through 12/28/2019							$ 41		$ 41
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							5.00%		5.00%
Restructuring and impairment charges									$ 47	2
Plan to Date through 12/28/2019							$ 49		$ 49
Severance and Other Employee Costs | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs							70.00%		70.00%
Beginning Balance			105						$ 105
Restructuring and impairment charges									149	137
Cash payments for restructuring charges									(138)
Non-cash charges and translation									12	(32)
Ending Balance							$ 128	105	128	105
Plan to Date through 12/28/2019							$ 286		$ 286
Asset Impairments | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs							15.00%		15.00%
Beginning Balance			0						$ 0
Restructuring and impairment charges									92	0
Cash payments for restructuring charges									0
Non-cash charges and translation									(92)	0
Ending Balance							$ 0	0	0	0
Plan to Date through 12/28/2019							$ 92		$ 92
Other Costs | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs							15.00%		15.00%
Beginning Balance			$ 1						$ 1
Restructuring and impairment charges									129	1
Cash payments for restructuring charges									(119)
Non-cash charges and translation									(10)	0
Ending Balance							$ 21	$ 1	21	1
Plan to Date through 12/28/2019							130		130
Cost of sales | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges									115	3
Selling, general and administrative expenses | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges									253	100
Other pension and retiree medical benefits expense | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges									2	35
Plan to Date through 12/28/2019							37		37
After-tax amount | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges									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									368	103
Plan to Date through 12/28/2019							$ 471		$ 471
Corporate | 2019 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Percentage of Expect Costs							9.00%		9.00%
Restructuring and impairment charges									$ 47	$ 7
Plan to Date through 12/28/2019							$ 54		$ 54