Basis of Presentation and Our Divisions (Segment Reporting Information by Amortization of Intangible Assets and Depreciation and Other Amortization) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Segment Reporting Information [Line Items]
Amortization of Intangible Assets	$ 90	$ 81	$ 69
Depreciation and Other Amortization	2,458	2,351	2,330
Frito Lay North America [Member]
Segment Reporting Information [Line Items]
Amortization of Intangible Assets	10	7	7
Depreciation and Other Amortization	550	492	457
Quaker Foods North America [Member]
Segment Reporting Information [Line Items]
Amortization of Intangible Assets	0	0	0
Depreciation and Other Amortization	41	44	45
PepsiCo Beverages North America [Member]
Segment Reporting Information [Line Items]
Amortization of Intangible Assets	28	29	31
Depreciation and Other Amortization	899	857	821
Europe
Segment Reporting Information [Line Items]
Amortization of Intangible Assets	40	37	23
Depreciation and Other Amortization	350	341	319
Africa, Middle East and South Asia [Member]
Segment Reporting Information [Line Items]
Amortization of Intangible Assets	3	2	2
Depreciation and Other Amortization	149	116	169
Asia Pacific, Australia and New Zealand, and China Region [Member]
Segment Reporting Information [Line Items]
Amortization of Intangible Assets	5	1	1
Depreciation and Other Amortization	91	76	80
Latin America
Segment Reporting Information [Line Items]
Amortization of Intangible Assets	4	5	5
Depreciation and Other Amortization	251	270	253
Operating Segments [Member]
Segment Reporting Information [Line Items]
Amortization of Intangible Assets	90	81	69
Depreciation and Other Amortization	2,331	2,196	2,144
Corporate
Segment Reporting Information [Line Items]
Amortization of Intangible Assets	0	0	0
Depreciation and Other Amortization	$ 127	$ 155	$ 186