Consolidated Statement of Equity - USD ($) shares in Thousands, $ in Millions		Total	Preferred Stock	Preferred Stock Repurchased Preferred Stock	Common Stock	Capital In Excess Of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Repurchased Common Stock	Total Common Shareholders' Equity	Noncontrolling Interests
Preferred Stock, Value, Outstanding			$ 41	$ (197)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets							$ (145)
Stockholders' Equity Attributable to Noncontrolling Interest											$ 92
Common Stocks, Including Additional Paid in Capital						$ 3,996
Treasury Stock, Value									$ (32,757)
Preferred Stock, Shares Issued, Beginning of year at Dec. 30, 2017			800	(700)
Stockholders' Equity Attributable to Parent at Dec. 30, 2017					$ 24
Stock Repurchased During Period, Value									$ (2,000)
Conversion of Stock, Shares Converted			(100)
Retirement of preferred stock			(700)	700
Convertible Preferred Stock Converted to Other Securities			$ (6)		$ 0	6
Retirement of preferred stock, value			$ (35)	$ 199			(164)
Preferred Stock, Shares Issued, End of year at Dec. 29, 2018			0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemptions (in shares)				0
Redemptions				$ (2)
Balance, beginning of year (in shares) at Dec. 30, 2017									(446,000)
Balance, end of year (in shares) at Dec. 29, 2018									(458,000)
Balance, outstanding, beginning of year (in shares) at Dec. 30, 2017					1,420,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased During Period, Shares					(12,000)				(18,000)
Balance, outstanding, end of year (in shares) at Dec. 29, 2018					1,409,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense						250
Stock option exercises, RSUs, PSUs and PEPunits converted						(193)			$ (469)
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation						(103)
Other						(3)
Share repurchases					$ 1
Stock option exercises (in shares)									6,000
Other (in shares)									0
Other									$ 2		(3)
Dividends, Common Stock, Cash	[1]						(5,098)
Balance, beginning of year at Dec. 30, 2017							52,839	$ (13,057)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Noncontrolling Interest		$ 44									44
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders											(49)
Other comprehensive income/(loss) attributable to PepsiCo								(2,062)
Balance, end of year at Dec. 29, 2018		14,602					59,947	(15,119)		$ 14,518
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		$ 12,515					12,515
Stockholders' Equity Attributable to Parent at Dec. 29, 2018					$ 23
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Shares, Conversion of Convertible Securities					1,000
Common Stock, Dividends, Per Share, Declared		$ 3.5875
Acquisitions And Divestitures To Noncontrolling Interest											0
Preferred Stock, Value, Outstanding			$ 0	$ 0
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets							8
Stockholders' Equity Attributable to Noncontrolling Interest											84
Common Stocks, Including Additional Paid in Capital						3,953
Treasury Stock, Value									(34,286)
Stock Repurchased During Period, Value									$ (3,000)
Conversion of Stock, Shares Converted			0
Retirement of preferred stock			0	0
Convertible Preferred Stock Converted to Other Securities			$ 0		$ 0	0
Retirement of preferred stock, value			$ 0	$ 0			0
Preferred Stock, Shares Issued, End of year at Dec. 28, 2019			0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemptions (in shares)				0
Redemptions				$ 0
Balance, end of year (in shares) at Dec. 28, 2019									(476,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased During Period, Shares					(18,000)				(24,000)
Balance, outstanding, end of year (in shares) at Dec. 28, 2019					1,391,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense						235
Stock option exercises, RSUs, PSUs and PEPunits converted						(188)			$ (516)
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation						(114)
Other						0
Share repurchases					$ 0
Stock option exercises (in shares)									6,000
Other (in shares)									0
Other									$ 1		1
Dividends, Common Stock, Cash	[1]						(5,323)
Net Income (Loss) Attributable to Noncontrolling Interest		$ 39									39
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders											(42)
Other comprehensive income/(loss) attributable to PepsiCo								819
Balance, end of year at Dec. 28, 2019		14,868					61,946	(14,300)		14,786
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		7,314					7,314
Stockholders' Equity Attributable to Parent at Dec. 28, 2019		$ 14,786			$ 23
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Shares, Conversion of Convertible Securities					0
Common Stock, Dividends, Per Share, Declared		$ 3.7925
Acquisitions And Divestitures To Noncontrolling Interest											0
Preferred Stock, Value, Outstanding			$ 0	$ 0
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets							(34)
Stockholders' Equity Attributable to Noncontrolling Interest		$ 82									82
Common Stocks, Including Additional Paid in Capital						3,886
Treasury Stock, Value									(36,769)
Stock Repurchased During Period, Value									$ (2,000)
Conversion of Stock, Shares Converted			0
Retirement of preferred stock			0	0
Convertible Preferred Stock Converted to Other Securities			$ 0		$ 0	0
Retirement of preferred stock, value			$ 0	$ 0			0
Preferred Stock, Shares Issued, End of year at Dec. 26, 2020			0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemptions (in shares)				0
Redemptions				$ 0
Balance, end of year (in shares) at Dec. 26, 2020									(487,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased During Period, Shares					(11,000)				(15,000)
Balance, outstanding, end of year (in shares) at Dec. 26, 2020					1,380,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense						263
Stock option exercises, RSUs, PSUs and PEPunits converted						(143)			$ (322)
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation						(96)
Other						0
Share repurchases					$ 0
Stock option exercises (in shares)		2,440							4,000
Other (in shares)									0
Other									$ 1		0
Dividends, Common Stock, Cash	[1]						(5,589)
Net Income (Loss) Attributable to Noncontrolling Interest		$ 55									55
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders											(44)
Other comprehensive income/(loss) attributable to PepsiCo								(1,176)
Balance, end of year at Dec. 26, 2020		13,552					63,443	$ (15,476)		$ 13,454
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		7,120					$ 7,120
Stockholders' Equity Attributable to Parent at Dec. 26, 2020		$ 13,454			$ 23
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Shares, Conversion of Convertible Securities					0
Common Stock, Dividends, Per Share, Declared		$ 4.0225
Acquisitions And Divestitures To Noncontrolling Interest											5
Preferred Stock, Value, Outstanding			$ 0	$ 0
Stockholders' Equity Attributable to Noncontrolling Interest		$ 98									$ 98
Common Stocks, Including Additional Paid in Capital						$ 3,910
Treasury Stock, Value									$ (38,446)

[1] (a) Cash dividends declared per common share were $4.0225, $3.7925 and $3.5875 for 2020, 2019 and 2018, respectively.