Segment Reporting Information by COVID-19 Charges (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 12, 2021	Jun. 13, 2020	Jun. 12, 2021	Jun. 13, 2020
Unusual or Infrequent Item, or Both [Line Items]
Accounts Receivable, Credit Loss Expense (reversal) Novel Coronavirus (COVID-19) Impact	$ (13)	$ 4	$ (21)	$ 72
Prepaid Incentives Novel Coronavirus (COVID-19 ) Impact	(6)	3	(5)	47
Inventory Write-down and Product Returns Novel Coronavirus (COVID-19) Impact	1	28	(1)	54
Employee Compensation Expense Novel Coronavirus (COVID-19) Impact	36	224	82	224
Employee Protection Costs Novel Coronavirus (COVID-19) Impact	19	86	39	86
Charges Related to Novel Coronavirus (COVID-19) Impact - Other	(2)	33	2	38
Charges Related to Novel Coronavirus (COVID-19)	35	378	96	521
Reserve for Product Returns Novel Coronavirus (COVID-19) Impact		9		16
Frito Lay North America [Member]
Unusual or Infrequent Item, or Both [Line Items]
Accounts Receivable, Credit Loss Expense (reversal) Novel Coronavirus (COVID-19) Impact	(4)	(2)	(8)	19
Prepaid Incentives Novel Coronavirus (COVID-19 ) Impact	0	0	0	0
Inventory Write-down and Product Returns Novel Coronavirus (COVID-19) Impact	0	4	0	7
Employee Compensation Expense Novel Coronavirus (COVID-19) Impact	11	100	29	100
Employee Protection Costs Novel Coronavirus (COVID-19) Impact	7	33	16	33
Charges Related to Novel Coronavirus (COVID-19) Impact - Other	0	0	1	3
Charges Related to Novel Coronavirus (COVID-19)	14	135	38	162
Quaker Foods North America [Member]
Unusual or Infrequent Item, or Both [Line Items]
Accounts Receivable, Credit Loss Expense (reversal) Novel Coronavirus (COVID-19) Impact	0	0	0	2
Prepaid Incentives Novel Coronavirus (COVID-19 ) Impact	0	0	0	0
Inventory Write-down and Product Returns Novel Coronavirus (COVID-19) Impact	0	0	0	0
Employee Compensation Expense Novel Coronavirus (COVID-19) Impact	1	6	2	6
Employee Protection Costs Novel Coronavirus (COVID-19) Impact	0	1	1	1
Charges Related to Novel Coronavirus (COVID-19) Impact - Other	0	0	0	0
Charges Related to Novel Coronavirus (COVID-19)	1	7	3	9
PepsiCo Beverages North America [Member]
Unusual or Infrequent Item, or Both [Line Items]
Accounts Receivable, Credit Loss Expense (reversal) Novel Coronavirus (COVID-19) Impact	(9)	4	(13)	45
Prepaid Incentives Novel Coronavirus (COVID-19 ) Impact	(6)	2	(5)	46
Inventory Write-down and Product Returns Novel Coronavirus (COVID-19) Impact	0	7	0	29
Employee Compensation Expense Novel Coronavirus (COVID-19) Impact	7	84	19	84
Employee Protection Costs Novel Coronavirus (COVID-19) Impact	4	31	9	31
Charges Related to Novel Coronavirus (COVID-19) Impact - Other	(7)	9	(8)	10
Charges Related to Novel Coronavirus (COVID-19)	(11)	137	2	245
Latin America (Segment)
Unusual or Infrequent Item, or Both [Line Items]
Accounts Receivable, Credit Loss Expense (reversal) Novel Coronavirus (COVID-19) Impact	0	1	0	1
Prepaid Incentives Novel Coronavirus (COVID-19 ) Impact	0	0	0	0
Inventory Write-down and Product Returns Novel Coronavirus (COVID-19) Impact	1	6	1	6
Employee Compensation Expense Novel Coronavirus (COVID-19) Impact	12	16	24	16
Employee Protection Costs Novel Coronavirus (COVID-19) Impact	3	8	5	8
Charges Related to Novel Coronavirus (COVID-19) Impact - Other	1	3	2	3
Charges Related to Novel Coronavirus (COVID-19)	17	34	32	34
Europe (Segment)
Unusual or Infrequent Item, or Both [Line Items]
Accounts Receivable, Credit Loss Expense (reversal) Novel Coronavirus (COVID-19) Impact	0	0	0	4
Prepaid Incentives Novel Coronavirus (COVID-19 ) Impact	0	1	0	1
Inventory Write-down and Product Returns Novel Coronavirus (COVID-19) Impact	0	10	0	10
Employee Compensation Expense Novel Coronavirus (COVID-19) Impact	5	9	8	9
Employee Protection Costs Novel Coronavirus (COVID-19) Impact	3	8	6	8
Charges Related to Novel Coronavirus (COVID-19) Impact - Other	1	17	1	17
Charges Related to Novel Coronavirus (COVID-19)	9	45	15	49
Africa, Middle East and South Asia [Member]
Unusual or Infrequent Item, or Both [Line Items]
Accounts Receivable, Credit Loss Expense (reversal) Novel Coronavirus (COVID-19) Impact	0	1	0	1
Prepaid Incentives Novel Coronavirus (COVID-19 ) Impact	0	0	0	0
Inventory Write-down and Product Returns Novel Coronavirus (COVID-19) Impact	0	1	(2)	1
Employee Compensation Expense Novel Coronavirus (COVID-19) Impact	0	7	0	7
Employee Protection Costs Novel Coronavirus (COVID-19) Impact	1	4	1	4
Charges Related to Novel Coronavirus (COVID-19) Impact - Other	2	4	3	4
Charges Related to Novel Coronavirus (COVID-19)	3	17	2	17
Asia Pacific, Australia and New Zealand, and China Region [Member]
Unusual or Infrequent Item, or Both [Line Items]
Accounts Receivable, Credit Loss Expense (reversal) Novel Coronavirus (COVID-19) Impact	0	0	0	0
Prepaid Incentives Novel Coronavirus (COVID-19 ) Impact	0	0	0	0
Inventory Write-down and Product Returns Novel Coronavirus (COVID-19) Impact	0	0	0	1
Employee Compensation Expense Novel Coronavirus (COVID-19) Impact	0	2	0	2
Employee Protection Costs Novel Coronavirus (COVID-19) Impact	1	1	1	1
Charges Related to Novel Coronavirus (COVID-19) Impact - Other	1	0	3	1
Charges Related to Novel Coronavirus (COVID-19)	$ 2	$ 3	$ 4	$ 5