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]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets						$ 0
Stockholders' Equity Attributable to Parent				$ 24	$ 4,091	52,518	$ (13,919)	$ (31,468)
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			$ (2)
Balance, beginning of year, shares at Dec. 31, 2016				1,428.0
Balance, end of year, shares at Mar. 25, 2017				1,430.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense					73
Stock option exercises, RSUs, PSUs and PEPunits converted					(191)			$ 446
Adjustments Related to Tax Withholding for Share-based Compensation					(116)
Other					0
Shares issued, beginning of year at Dec. 31, 2016								(438.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased During Period, Shares				(2.0)				(4.0)
Treasury Stock, Value, Acquired, Cost Method				$ 0
Stock Repurchased During Period, Value								$ (477)
Stock option exercises, shares								6.0
Other (in shares)								0.0
Net income attributable to PepsiCo	$ 1,318					1,318
Cash dividends declared - common						(1,080)
Shares issued, end of period at Mar. 25, 2017								(436.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Noncontrolling Interest	11									11
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							503
Stock Issued During Period, Shares, Conversion of Convertible Securities				0.0
Preferred Stock, Shares Issued		0.8	(0.7)
Preferred Stock, Value, Issued		$ 41	$ (194)
Stockholders' Equity Attributable to Parent				$ 24	3,857	52,756	(13,416)	$ (31,499)	$ 11,722
Stockholders' Equity Attributable to Noncontrolling Interest										114
Preferred Stock, Shares Issued		0.8	(0.7)
Preferred Stock, Value, Issued	41	$ 41	$ (197)
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets						(145)
Stockholders' Equity Attributable to Parent	11,045			24	3,996	52,839	(13,057)	(32,757)
Stockholders' Equity Attributable to Noncontrolling Interest	92									92
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 Mar. 24, 2018				1,419.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense					83
Stock option exercises, RSUs, PSUs and PEPunits converted					(142)			$ 261
Adjustments Related to Tax Withholding for Share-based Compensation					(76)
Other					(1)
Shares issued, beginning of year at Dec. 30, 2017								(446.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased During Period, Shares				(2.0)				(5.0)
Treasury Stock, Value, Acquired, Cost Method				$ 0
Stock Repurchased During Period, Value								$ (521)
Stock option exercises, shares								3.0
Other (in shares)								0.0
Other								$ 1
Net income attributable to PepsiCo	1,343					1,343
Cash dividends declared - common						(1,147)
Shares issued, end of period at Mar. 24, 2018								(448.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Noncontrolling Interest	10									10
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent							340
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	10,883			$ 24	$ 3,866	$ 52,726	$ (12,717)	$ (33,016)	$ 10,883
Stockholders' Equity Attributable to Noncontrolling Interest	$ 102									$ 102