Basis of Presentation and Our Divisions (Segment Reporting Information by Total Assets and Capital Spending) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Segment Reporting Information [Line Items]
Total Assets	$ 92,918	$ 78,547
Capital Spending	4,240	4,232	$ 3,282
Frito Lay North America [Member]
Segment Reporting Information [Line Items]
Total Assets	8,730	7,519
Capital Spending	1,189	1,227	840
Quaker Foods North America [Member]
Segment Reporting Information [Line Items]
Total Assets	1,021	941
Capital Spending	85	104	53
PepsiCo Beverages North America [Member]
Segment Reporting Information [Line Items]
Total Assets	37,079	31,449
Capital Spending	1,245	1,053	945
Africa, Middle East and South Asia [Member]
Segment Reporting Information [Line Items]
Total Assets	5,942	3,672
Capital Spending	252	267	198
Asia Pacific, Australia and New Zealand, and China Region [Member]
Segment Reporting Information [Line Items]
Total Assets	5,770	4,113
Capital Spending	230	195	138
Latin America
Segment Reporting Information [Line Items]
Total Assets	6,977	7,007
Capital Spending	390	557	492
Europe
Segment Reporting Information [Line Items]
Total Assets	17,917	17,814
Capital Spending	730	613	466
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Assets	83,436	72,515
Capital Spending	4,121	4,016	3,132
Corporate
Segment Reporting Information [Line Items]
Total Assets	9,482	6,032
Capital Spending	$ 119	$ 216	$ 150