Segment Reporting - Net Revenues and Earnings (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Net revenues	$ 7,764	$ 7,238	[1]
Operating income	1,094	1,283
Unrealized gains/(losses) on hedging activities (mark-to-market impacts)	27	118
General corporate expenses	(50)	(64)
Amortization of intangible assets	(32)	(38)
Gain on acquisition	0	9
Acquisition-related costs	(21)	(7)
Benefit plan non-service income	33	44
Interest and other expense, net	(168)	(218)
Earnings before income taxes	959	1,109
Latin America
Segment Reporting Information [Line Items]
Net revenues	826	669	[1]
Operating income	103	76
AMEA
Segment Reporting Information [Line Items]
Net revenues	1,867	1,745	[1]
Operating income	272	362
Europe
Segment Reporting Information [Line Items]
Net revenues	2,935	2,847	[1]
Operating income	377	557
North America
Segment Reporting Information [Line Items]
Net revenues	2,136	1,977	[1]
Operating income	$ 418	$ 270

[1] Our snack product categories include biscuits, chocolate and gum & candy. During 2022, we realigned some of our products between our biscuits and chocolate categories; as such, we reclassified the product category net revenues on a basis consistent with the 2022 presentation.