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Restructuring and Impairment Charges - Charges (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Restructuring and impairment charges
Restructuring/impairment charges and related adjustments		$ (12)	$ 16	$ 362	$ 41
Impairment on disposition of assets	$ (20)	(20)		340
Restructuring charges		8	6		31
Verdient Foods, Inc.
Restructuring and impairment charges
Equity method investment, Other than temporary impairment			10		10
Cost Smart Cost of Sales and SG&A Program
Restructuring and impairment charges
Restructuring charges		8	6	22	31
Cost Smart Cost of Sales Program
Restructuring and impairment charges
Restructuring charges		$ 3	2	$ 11	17
Cost Smart SG&A Program
Restructuring and impairment charges
Restructuring charges			$ 4		$ 14