Accumulated Other Comprehensive Loss Attributable to Pepsico (Schedule of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 30, 2017		Dec. 31, 2016	Dec. 26, 2015		Dec. 27, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Currency translation adjustment	[1]	$ (10,277)		$ (11,386)	$ (11,080)		$ (8,255)
Cash flow hedges, net of tax	[1]	47		83	37		34
Unamortized pension and retiree medical, net of tax (b)	[2]	(2,804)		(2,645)	(2,329)		(2,500)
Unrealized gain on securities, net of tax	[1]	(4)		64	88		87
Other	[1]	(19)		(35)	(35)		(35)
Accumulated other comprehensive loss attributable to PepsiCo		(13,057)	[1]	(13,919)	(13,319)		(10,669)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax		1,049	[3]	(313)	(2,936)	[2]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax		1,049		(313)	(2,825)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax		(41)		76	2
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax		(217)		(343)	178
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax		(74)		(43)	3
Other Comprehensive Income, Other, Before Tax		0		0	0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent		717		(623)	(2,642)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax		130	[3]	(74)	(95)	[2]
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax		(375)	[3]	(750)	(88)	[2]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax		25	[3]	(43)	3	[2]
Other Comprehensive Income (Loss), before Reclassifications, before Tax		0	[3]	0	0	[2]
OCI, before Reclassifications, before Tax, Attributable to Parent		829	[3]	(1,180)	(3,116)	[2]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax		0		0	111
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax		(171)		150	97
Other Comprehensive (Income)/Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax, including Venezuela					266
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax		158		407	246
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax		(99)		0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		0		0	0
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent		(112)		557	474
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax		60		7	0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax		5		(30)	1
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax		58		27	(7)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax		6		19	(2)
Other Comprehensive Income, Other, Taxes		16		0	0
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent		145		23	(8)
Net of taxes decrease to opening balance of accumulated other comprehensive loss attributable to Pepsico		$ 1,338		$ 1,280	$ 1,253		$ 1,260

[1] Pension and retiree medical amounts are net of taxes of $1,260 million in 2014, $1,253 million in 2015, $1,280 million in 2016 and $1,338 million in 2017.

[2] Currency translation adjustment primarily reflects the depreciation of the Russian ruble, Brazilian real and Canadian dollar.

[3] Currency translation adjustment primarily reflects the appreciation of the euro, Russian ruble, Pound sterling and Canadian dollar.