Restructuring, Impairment and Integration Charges Restructuring, Impairment and Integration Charges (Summary of 2014 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
Payments for Restructuring									(350)	(255)	(113)
2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Beginning Balance			114			226			114	226	96
Restructuring and impairment charges									0	170	295
Payments for Restructuring									(93)	(255)	(113)
Non-cash charges and translation									(21)	(27)	(52)
Ending Balance							0	114	0	$ 114	$ 226
Net income attributable to PepsiCo per common share										$ 0.10	$ 0.16
Plan to Date through 12/28/2019							1,300		1,300
Restructuring and Related Cost, Total Cash Expenditures							$ 960		$ 960
Cash payments reported on the cash flow statement in pension and retiree medical contributions										$ 11
Frito Lay North America [Member] | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges										8	$ 67
Percent of Total Plan Restructuring Charges							14.00%		14.00%
Quaker Foods North America [Member] | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges										2	11
Percent of Total Plan Restructuring Charges							3.00%		3.00%
PepsiCo Beverages North America [Member] | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges										51	54
Percent of Total Plan Restructuring Charges							29.00%		29.00%
Latin America [Member] | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges										30	63
Percent of Total Plan Restructuring Charges							15.00%		15.00%
Europe [Member] | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges										53	53
Percent of Total Plan Restructuring Charges							23.00%		23.00%
Africa, Middle East and South Asia [Member] | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges										15	2
Percent of Total Plan Restructuring Charges							3.00%		3.00%
Asia Pacific, Australia and New Zealand, and China Region [Member] | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges										12	(5)
Percent of Total Plan Restructuring Charges							3.00%		3.00%
Severance and Other Employee Costs | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Beginning Balance			91			212			$ 91	212	88
Restructuring and impairment charges										86	280
Payments for Restructuring									(77)	(203)	(91)
Non-cash charges and translation									(14)	(4)	(65)
Ending Balance							$ 0	91	$ 0	91	212
Percent of Total Plan Restructuring Charges							59.00%		59.00%
Asset Impairments | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Beginning Balance			0			0			$ 0	0	0
Restructuring and impairment charges										28	21
Payments for Restructuring									0	0	0
Non-cash charges and translation									0	(28)	(21)
Ending Balance							$ 0	0	$ 0	0	0
Percent of Total Plan Restructuring Charges							15.00%		15.00%
Other Costs | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Beginning Balance			$ 23			$ 14			$ 23	14	8
Restructuring and impairment charges										56	(6)
Payments for Restructuring									(16)	(52)	(22)
Non-cash charges and translation									(7)	5	34
Ending Balance							$ 0	$ 23	$ 0	23	14
Percent of Total Plan Restructuring Charges							26.00%		26.00%
Selling, general and administrative expenses | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges										169	229
Other pension and retiree medical benefits expense | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges										1	66
After-tax amount | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges										143	224
Corporate | 2014 Productivity Plan
Total Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges										$ (1)	$ 50
Percent of Total Plan Restructuring Charges							10.00%		10.00%