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. 15, 2019	Jun. 15, 2019	Jun. 16, 2018
Restructuring Cost and Reserve [Line Items]
Cash payments		$ (153)	$ (126)
2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Liability as of December 29, 2018		106
Restructuring Charges	$ 158	184
Cash payments		(64)
Non-cash charges and translation		(79)
Liability as of June 15, 2019	$ 147	$ 147
Net income attributable to PepsiCo per common share	$ 0.08	$ 0.10
Restructuring and Related Cost, Cost Incurred to Date	$ 322	$ 322
2019 Productivity Plan [Member] | Cash expenditures excluded from liability rollforward [Member]
Restructuring Cost and Reserve [Line Items]
Cash payments		2
2019 Productivity Plan [Member] | Frito Lay North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	6	6
Restructuring and Related Cost, Cost Incurred to Date	37	37
2019 Productivity Plan [Member] | Quaker Foods North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0	0
Restructuring and Related Cost, Cost Incurred to Date	5	5
2019 Productivity Plan [Member] | PepsiCo Beverages North America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	10	16
Restructuring and Related Cost, Cost Incurred to Date	56	56
2019 Productivity Plan [Member] | Latin America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	21	21
Restructuring and Related Cost, Cost Incurred to Date	30	30
2019 Productivity Plan [Member] | Europe Sub-Saharan Africa [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	53	59
Restructuring and Related Cost, Cost Incurred to Date	67	67
2019 Productivity Plan [Member] | Asia, Middle East and North Africa [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	42	53
Restructuring and Related Cost, Cost Incurred to Date	56	56
Corporate Unallocated [Member] | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	26	34
Restructuring and Related Cost, Cost Incurred to Date	41	41
Employee Severance [Member] | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Liability as of December 29, 2018		105
Restructuring Charges	43	40
Cash payments		(44)
Non-cash charges and translation		5
Liability as of June 15, 2019	106	106
Restructuring and Related Cost, Cost Incurred to Date	177	177
Asset Impairment [Member] | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Liability as of December 29, 2018		0
Restructuring Charges	76	84
Cash payments		0
Non-cash charges and translation		(84)
Liability as of June 15, 2019	0	0
Restructuring and Related Cost, Cost Incurred to Date	84	84
Other Restructuring [Member] | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Liability as of December 29, 2018		1
Restructuring Charges	39	60
Cash payments		(20)
Non-cash charges and translation		0
Liability as of June 15, 2019	41	41
Restructuring and Related Cost, Cost Incurred to Date	61	61
Cost of sales | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	82	90
Selling, general and administrative expenses | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	76	99
Other pension and retiree medical benefits income (a) | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0	(5)
Restructuring and Related Cost, Cost Incurred to Date	30	30
After-tax amount | 2019 Productivity Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	120	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	158	189
Restructuring and Related Cost, Cost Incurred to Date	$ 292	$ 292