Supplemental Income Statement Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other (income) expense, net
Total Global Growth and Efficiency Program charges, pretax	$ (13)	$ 57	$ 88
Amortization of intangible assets	88	62	59
Equity income	(12)	(9)	(10)
Value-added tax matter in Brazil	0	(30)	0
Write-off of certain investments and fixed assets	0	51	1
Acquisition-related costs	2	21	0
Charges for a change in go-to-market strategy in certain countries	0	15	0
Other, net	48	29	10
Total Other (income) expense, net	113	196	148
Interest (income) expense, net
Interest incurred	184	193	195
Interest capitalized	(1)	(1)	(2)
Interest income	(19)	(47)	(50)
Total Interest (income) expense, net	164	145	143
Research and development	290	281	277
Advertising	$ 1,948	$ 1,694	$ 1,590