CONDENSED CONSOLIDATED STATEMENT OF EQUITY - USD ($) shares in Millions, $ in Millions	Total	Preferred Stock	Preferred Stock Redeemable Preferred Stock [Member]	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Repurchased Common Stock	Total Common Shareholder's Equity	Noncontrolling Interests
Preferred Stock, Shares Issued		0.8	(0.7)
Preferred Stock, Value, Issued		$ 41	$ (192)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity Attributable to Parent				$ 24	$ 4,091	$ 52,518	$ (13,919)	$ (31,468)
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets						0
Stockholders' Equity Attributable to Noncontrolling Interest										$ 104
Conversion of Stock, Shares Converted		0.0
Retirement of preferred stock		0.0	0.0
Convertible Preferred Stock Converted to Other Securities		$ 0		$ 0	0
Retirement of preferred stock, value		$ 0	$ 0			0
Redemptions, shares			0.0
Redemptions			$ (4)
Balance, beginning of year, shares at Dec. 31, 2016				1,428.0
Balance, end of year, shares at Sep. 09, 2017				1,423.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense					209
Stock option exercises, RSUs, PSUs and PEPunits converted					(221)			$ 620
Adjustments Related to Tax Withholding for Share-based Compensation					(131)
Other					(4)
Shares issued, beginning of year at Dec. 31, 2016								(438.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased During Period, Shares				(5.0)				(13.0)
Treasury Stock, Value, Acquired, Cost Method				$ 0
Stock Repurchased During Period, Value								$ (1,495)
Stock option exercises, shares								8.0
Other (in shares)								0.0
Other								$ 2
Net income attributable to PepsiCo	$ 5,567					5,567
Cash dividends declared - common						(3,387)
Shares issued, end of period at Sep. 09, 2017								(443.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Noncontrolling Interest	36									36
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders										(25)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax										1
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent							1,044
Stock Issued During Period, Shares, Conversion of Convertible Securities				0.0
Preferred Stock, Shares Issued		0.8	(0.7)
Preferred Stock, Value, Issued		$ 41	$ (196)
Stockholders' Equity Attributable to Parent				$ 24	3,944	54,698	(12,875)	$ (32,341)	$ 13,450
Stockholders' Equity Attributable to Noncontrolling Interest										116
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	13,411
Preferred Stock, Shares Issued		0.8	(0.7)
Preferred Stock, Value, Issued	41	$ 41	$ (197)
Stockholders' Equity Attributable to Parent	11,045			24	3,996	52,839	(13,057)	(32,757)
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									92
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	10,981
Conversion of Stock, Shares Converted		(0.1)
Retirement of preferred stock		(0.7)	0.7
Convertible Preferred Stock Converted to Other Securities		$ (6)		$ 0	6
Retirement of preferred stock, value		$ (35)	$ 199			(164)
Redemptions, shares			0.0
Redemptions			$ (2)
Balance, beginning of year, shares at Dec. 30, 2017				1,420.0
Balance, end of year, shares at Sep. 08, 2018				1,412.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense					204
Stock option exercises, RSUs, PSUs and PEPunits converted					(172)			$ 381
Adjustments Related to Tax Withholding for Share-based Compensation					(93)
Other					(2)
Shares issued, beginning of year at Dec. 30, 2017								(446.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased During Period, Shares				(9.0)				(14.0)
Treasury Stock, Value, Acquired, Cost Method				$ 0
Stock Repurchased During Period, Value								$ (1,453)
Stock option exercises, shares								5.0
Other (in shares)								0.0
Other								$ 1
Net income attributable to PepsiCo	5,661					5,661
Cash dividends declared - common						(3,787)
Shares issued, end of period at Sep. 08, 2018								(455.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Noncontrolling Interest	31									31
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders										(20)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent							(1,196)
Stock Issued During Period, Shares, Conversion of Convertible Securities				1.0
Preferred Stock, Shares Issued		0.0	0.0
Preferred Stock, Value, Issued	0	$ 0	$ 0
Stockholders' Equity Attributable to Parent	10,286			$ 24	$ 3,939	$ 54,404	$ (14,253)	$ (33,828)	$ 10,286
Stockholders' Equity Attributable to Noncontrolling Interest	103									$ 103
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 10,389