Accumulated Other Comprehensive Loss Attributable to PepsiCo - Schedule of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	3 Months Ended						8 Months Ended
	Sep. 03, 2022	Jun. 11, 2022	Mar. 19, 2022	Sep. 04, 2021	Jun. 12, 2021	Mar. 20, 2021	Sep. 03, 2022	Sep. 04, 2021	Dec. 25, 2021	Dec. 26, 2020
Statement of Other Comprehensive Income [Abstract]
Beginning balance	$ (11,595)	$ (12,869)	$ (12,309)	$ (11,541)	$ (11,809)	$ (11,940)	$ (12,309)	$ (11,940)
Other comprehensive (loss)/income before reclassifications (b)	(292)	1,298	(549)	(319)	255	128
Amounts reclassified from accumulated other comprehensive loss	0	0	0	0	0	18	0	18
Net other comprehensive (loss)/income	(292)	1,298	(549)	(319)	255	146
Tax amounts	(32)	(24)	(11)	(16)	13	(15)
Ending balance	(11,919)	(11,595)	(12,869)	(11,876)	(11,541)	(11,809)	(11,919)	(11,876)
Beginning balance	163	265	159	169	76	4	159	4
Other comprehensive (loss)/income before reclassifications (b)	(191)	(107)	200	(45)	175	97
Amounts reclassified from accumulated other comprehensive loss	44	(30)	(62)	14	(53)	(1)	(48)	(40)
Net other comprehensive (loss)/income	(147)	(137)	138	(31)	122	96
Tax amounts	34	35	(32)	10	(29)	(24)
Ending balance	50	163	265	148	169	76	50	148
Beginning balance	2,987	2,737	2,750	3,469	3,493	3,520	2,750	3,520
Other comprehensive income/(loss) before reclassifications (c)	50	(484)	(8)	49	(28)	(20)
Amounts reclassified from accumulated other comprehensive loss	90	161	25	67	57	52	276	176
Net other comprehensive income/(loss)	140	(323)	17	116	29	32
Tax amounts	(32)	73	(4)	(26)	(5)	(5)
Ending balance	2,879	2,987	2,737	3,379	3,469	3,493	2,879	3,379
Beginning balance	3	(2)	2	(18)	(20)	(20)	2	(20)
Other comprehensive (loss)/income before reclassifications (d)	2	5	0	0	2	0
Amounts reclassified from accumulated other comprehensive loss	0	0	0	0	0	0
Net other comprehensive (loss)/income	2	5	0	0	2	0
Tax amounts	0	0	(4)	0	0	0
Ending balance	5	3	(2)	(18)	(18)	(20)	5	(18)
OCI, before Reclassifications, before Tax, Attributable to Parent	(431)	712	(357)	(315)	404	205
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	134	131	(37)	81	4	69
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(297)	843	(394)	(234)	408	274
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	(30)	84	(51)	(32)	(21)	(44)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(14,743)	(14,416)	(15,343)	(15,125)	(14,859)	(15,246)	$ (14,743)	(15,125)	$ (14,898)	$ (15,476)
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	$ 1,320	$ 1,352	$ 1,279	$ 1,478	$ 1,504	$ 1,509	$ 1,320	$ 1,478	$ 1,283	$ 1,514