Basis of Presentation and Our Divisions (COVID-19) (Details) $ in Millions	12 Months Ended
	Dec. 26, 2020 USD ($)
Segment Reporting Information [Line Items]
Accounts Receivable, Credit Loss Expense (reversal) Novel Coronavirus (COVID-19) Impact	$ 56
Prepaid Incentives Novel Coronavirus (COVID-19) Impact	59
Inventory Write-down and Product Returns Novel Coronavirus (COVID-19) Impact	72
Employee Compensation Expense Novel Coronavirus (COVID-19) Impact	350
Employee Protection Costs Novel Coronavirus (COVID-19) Impact	161
Charges Related to Novel Coronavirus (COVID-19) Impact - Other	76
Charges Related to Novel Coronavirus (COVID-19)	774
Reserve for Product Returns Novel Coronavirus (COVID-19) Impact	20
Social Welfare Credit Novel Coronavirus (COVID-19) Impact	11
Frito Lay North America [Member]
Segment Reporting Information [Line Items]
Accounts Receivable, Credit Loss Expense (reversal) Novel Coronavirus (COVID-19) Impact	17
Prepaid Incentives Novel Coronavirus (COVID-19) Impact	0
Inventory Write-down and Product Returns Novel Coronavirus (COVID-19) Impact	8
Employee Compensation Expense Novel Coronavirus (COVID-19) Impact	145
Employee Protection Costs Novel Coronavirus (COVID-19) Impact	59
Charges Related to Novel Coronavirus (COVID-19) Impact - Other	0
Charges Related to Novel Coronavirus (COVID-19)	229
Quaker Foods North America [Member]
Segment Reporting Information [Line Items]
Accounts Receivable, Credit Loss Expense (reversal) Novel Coronavirus (COVID-19) Impact	2
Prepaid Incentives Novel Coronavirus (COVID-19) Impact	0
Inventory Write-down and Product Returns Novel Coronavirus (COVID-19) Impact	0
Employee Compensation Expense Novel Coronavirus (COVID-19) Impact	9
Employee Protection Costs Novel Coronavirus (COVID-19) Impact	3
Charges Related to Novel Coronavirus (COVID-19) Impact - Other	1
Charges Related to Novel Coronavirus (COVID-19)	15
PepsiCo Beverages North America [Member]
Segment Reporting Information [Line Items]
Accounts Receivable, Credit Loss Expense (reversal) Novel Coronavirus (COVID-19) Impact	29
Prepaid Incentives Novel Coronavirus (COVID-19) Impact	56
Inventory Write-down and Product Returns Novel Coronavirus (COVID-19) Impact	28
Employee Compensation Expense Novel Coronavirus (COVID-19) Impact	115
Employee Protection Costs Novel Coronavirus (COVID-19) Impact	50
Charges Related to Novel Coronavirus (COVID-19) Impact - Other	26
Charges Related to Novel Coronavirus (COVID-19)	304
Africa, Middle East and South Asia [Member]
Segment Reporting Information [Line Items]
Accounts Receivable, Credit Loss Expense (reversal) Novel Coronavirus (COVID-19) Impact	2
Prepaid Incentives Novel Coronavirus (COVID-19) Impact	0
Inventory Write-down and Product Returns Novel Coronavirus (COVID-19) Impact	3
Employee Compensation Expense Novel Coronavirus (COVID-19) Impact	9
Employee Protection Costs Novel Coronavirus (COVID-19) Impact	7
Charges Related to Novel Coronavirus (COVID-19) Impact - Other	12
Charges Related to Novel Coronavirus (COVID-19)	33
Asia Pacific, Australia and New Zealand, and China Region [Member]
Segment Reporting Information [Line Items]
Accounts Receivable, Credit Loss Expense (reversal) Novel Coronavirus (COVID-19) Impact	0
Prepaid Incentives Novel Coronavirus (COVID-19) Impact	0
Inventory Write-down and Product Returns Novel Coronavirus (COVID-19) Impact	3
Employee Compensation Expense Novel Coronavirus (COVID-19) Impact	(7)
Employee Protection Costs Novel Coronavirus (COVID-19) Impact	2
Charges Related to Novel Coronavirus (COVID-19) Impact - Other	5
Charges Related to Novel Coronavirus (COVID-19)	3
Latin America
Segment Reporting Information [Line Items]
Accounts Receivable, Credit Loss Expense (reversal) Novel Coronavirus (COVID-19) Impact	1
Prepaid Incentives Novel Coronavirus (COVID-19) Impact	0
Inventory Write-down and Product Returns Novel Coronavirus (COVID-19) Impact	19
Employee Compensation Expense Novel Coronavirus (COVID-19) Impact	56
Employee Protection Costs Novel Coronavirus (COVID-19) Impact	18
Charges Related to Novel Coronavirus (COVID-19) Impact - Other	8
Charges Related to Novel Coronavirus (COVID-19)	102
Europe
Segment Reporting Information [Line Items]
Accounts Receivable, Credit Loss Expense (reversal) Novel Coronavirus (COVID-19) Impact	5
Prepaid Incentives Novel Coronavirus (COVID-19) Impact	3
Inventory Write-down and Product Returns Novel Coronavirus (COVID-19) Impact	11
Employee Compensation Expense Novel Coronavirus (COVID-19) Impact	23
Employee Protection Costs Novel Coronavirus (COVID-19) Impact	22
Charges Related to Novel Coronavirus (COVID-19) Impact - Other	24
Charges Related to Novel Coronavirus (COVID-19)	$ 88