Accumulated Other Comprehensive Loss Attributable to PepsiCo - Schedule of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	3 Months Ended						8 Months Ended
	Sep. 09, 2023	Jun. 17, 2023	Mar. 25, 2023	Sep. 03, 2022	Jun. 11, 2022	Mar. 19, 2022	Sep. 09, 2023	Sep. 03, 2022	Dec. 31, 2022	Dec. 25, 2021
Statement of Other Comprehensive Income [Abstract]
Beginning balance	$ (13,381)	$ (13,183)	$ (12,948)	$ (11,595)	$ (12,869)	$ (12,309)	$ (12,948)	$ (12,309)
Other comprehensive (loss)/income before reclassifications (b)	19	(215)	(350)	(292)	1,298	(549)
Amounts reclassified from accumulated other comprehensive loss	0	0	108	0	0	0	108	0
Net other comprehensive (loss)/income	19	(215)	(242)	(292)	1,298	(549)
Tax amounts	(17)	17	7	(32)	(24)	(11)
Ending balance	(13,379)	(13,381)	(13,183)	(11,919)	(11,595)	(12,869)	(13,379)	(11,919)
Beginning balance	(34)	(58)	1	163	265	159	1	159
Other comprehensive (loss)/income before reclassifications (b)	(96)	19	(92)	(191)	(107)	200
Amounts reclassified from accumulated other comprehensive loss	81	12	13	44	(30)	(62)	106	(48)
Net other comprehensive (loss)/income	(15)	31	(79)	(147)	(137)	138
Tax amounts	4	(7)	20	34	35	(32)
Ending balance	(45)	(34)	(58)	50	163	265	(45)	50
Beginning balance	2,371	2,365	2,361	2,987	2,737	2,750	2,361	2,750
Other comprehensive income/(loss) before reclassifications (c)	(15)	(14)	(9)	50	(484)	(8)
Amounts reclassified from accumulated other comprehensive loss	5	5	5	90	161	25	15	276
Net other comprehensive income/(loss)	(10)	(9)	(4)	140	(323)	17
Tax amounts	2	3	0	(32)	73	(4)
Ending balance	2,379	2,371	2,365	2,879	2,987	2,737	2,379	2,879
Beginning balance	6	5	6	3	(2)	2	6	2
Other comprehensive (loss)/income before reclassifications (d)	3	1	(1)	2	5	0
Amounts reclassified from accumulated other comprehensive loss	0	0	0	0	0	0
Net other comprehensive (loss)/income	3	1	(1)	2	5	0
Tax amounts	0	0	0	0	0	(4)
Ending balance	9	6	5	5	3	(2)	9	5
OCI, before Reclassifications, before Tax, Attributable to Parent	(89)	(209)	(452)	(431)	712	(357)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	86	17	126	134	131	(37)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(3)	(192)	(326)	(297)	843	(394)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	(11)	13	27	(30)	84	(51)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(15,794)	(15,780)	(15,601)	(14,743)	(14,416)	(15,343)	$ (15,794)	(14,743)	$ (15,302)	$ (14,898)
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]							Selling, general and administrative expenses
Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Post retirement Plans Taxes	$ 1,189	$ 1,187	$ 1,184	$ 1,320	$ 1,352	$ 1,279	$ 1,189	$ 1,320	$ 1,184	$ 1,283