Change in Book Value of Nonamortizable Intangible Assets (Detail) - USD ($) $ in Millions	8 Months Ended
	Sep. 05, 2020	Dec. 28, 2019
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	$ 36,274	$ 30,111
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	6,534
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	(371)
Impairment of Intangible Assets (Excluding Goodwill)	41
Frito Lay North America [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	802	461
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	342
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	(1)
QFNA
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	200	200
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	0
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	0
PepsiCo Beverages North America [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	24,009	19,267
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	4,783
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	(41)
Latin America [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	548	626
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	0
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	(78)
Europe [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	8,510	8,804
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	16
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	(310)
Africa, Middle East and South Asia [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	1,210	446
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	729
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	35
Asia Pacific, Australia and New Zealand, and China Region [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	995	307
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	664
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	24
Goodwill
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	18,603	15,501
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	3,298
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	(196)
Goodwill | Frito Lay North America [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	462	299
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	163
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	0
Goodwill | QFNA
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	189	189
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	0
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	0
Goodwill | PepsiCo Beverages North America [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	12,139	9,898
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	2,241
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	0
Goodwill | Latin America [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	444	501
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	0
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	(57)
Goodwill | Europe [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	3,802	3,961
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	16
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	(175)
Goodwill | Africa, Middle East and South Asia [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	991	446
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	521
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	24
Goodwill | Asia Pacific, Australia and New Zealand, and China Region [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	576	207
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	357
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	12
Brands
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	8,261	5,342
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	3,094
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	(175)
Brands | Frito Lay North America [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	340	162
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	179
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	(1)
Brands | QFNA
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	11	11
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	0
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	0
Brands | PepsiCo Beverages North America [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	3,122	763
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	2,400
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	(41)
Brands | Latin America [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	104	125
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	0
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	(21)
Brands | Europe [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	4,046	4,181
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	0
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	(135)
Brands | Africa, Middle East and South Asia [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	219
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	208
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	11
Brands | Asia Pacific, Australia and New Zealand, and China Region [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	419	100
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	307
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	12
Reacquired Franchise Rights
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	7,584	7,594
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	0
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	(10)
Reacquired Franchise Rights | PepsiCo Beverages North America [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	7,089	7,089
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	0
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	0
Reacquired Franchise Rights | Europe [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	495	505
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	0
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	(10)
Acquired franchise rights
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	1,826	1,674
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	142
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	10
Acquired franchise rights | PepsiCo Beverages North America [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	1,659	1,517
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	142
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	0
Acquired franchise rights | Europe [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	167	$ 157
Goodwill and Indefinite-lived Intangible Assets, Acquired (Divested) During Period	0
Indefinite-lived Intangible Assets [Roll Forward]
Translation and Other	$ 10