Consolidated Statement of Equity - USD ($) shares in Thousands, $ in Millions		Total	Common Stock	Capital In Excess Of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Repurchased Common Stock	Total Common Shareholders' Equity	Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
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)
Stockholders' Equity Attributable to Parent at Dec. 29, 2018			$ 23
Stock Repurchased During Period, Value							$ (3,000)
Balance, beginning of year (in shares) at Dec. 29, 2018							(458,000)
Balance, end of year (in shares) at Dec. 28, 2019							(476,000)
Balance, outstanding, beginning of year (in shares) at Dec. 29, 2018			1,409,000
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)
Balance, beginning of year at Dec. 29, 2018					59,947	$ (15,119)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
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			$ 23
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Declared		$ 3.7925
Acquisitions And Divestitures To Noncontrolling Interest									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
Common Stocks, Including Additional Paid in Capital				3,886
Treasury Stock, Value							(36,769)
Stock Repurchased During Period, Value							$ (2,000)
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)							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]
Common Stock, Dividends, Per Share, Declared		$ 4.0225
Acquisitions And Divestitures To Noncontrolling Interest									5
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets					0
Stockholders' Equity Attributable to Noncontrolling Interest		$ 98							98
Common Stocks, Including Additional Paid in Capital				3,910
Treasury Stock, Value		$ 38,446					(38,446)
Stock Repurchased During Period, Value							$ (106)
Balance, end of year (in shares) at Dec. 25, 2021							(484,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased During Period, Shares			3,000				(1,000)
Balance, outstanding, end of year (in shares) at Dec. 25, 2021			1,383,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense				302
Stock option exercises, RSUs, PSUs and PEPunits converted				(118)			$ (303)
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation				(92)
Other				(1)
Share repurchases			$ 0
Stock option exercises (in shares)		2,321					4,000
Other (in shares)							0
Other							$ 1		(2)
Dividends, Common Stock, Cash	[1]				(5,896)
Net Income (Loss) Attributable to Noncontrolling Interest		$ 61							61
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders									(49)
Other comprehensive income/(loss) attributable to PepsiCo						578
Balance, end of year at Dec. 25, 2021		16,151			65,165	$ (14,898)		$ 16,043
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		7,618			$ 7,618
Stockholders' Equity Attributable to Parent at Dec. 25, 2021		$ 16,043	$ 23
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Declared		$ 4.2475
Acquisitions And Divestitures To Noncontrolling Interest									0
Stockholders' Equity Attributable to Noncontrolling Interest		$ 108							$ 108
Common Stocks, Including Additional Paid in Capital				$ 4,001
Treasury Stock, Value		$ 38,248					$ (38,248)

[1] (a) Cash dividends declared per common share were $4.2475, $4.0225 and $3.7925 for 2021, 2020 and 2019, respectively.