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Restructuring and Impairment Charges - Charges (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring and impairment charges
Restructuring charges		$ 57	$ 64
Cost Smart Cost of Sales Program
Restructuring and impairment charges
Restructuring charges		29	49
Cost Smart Cost of Sales Program | Accelerated depreciation
Restructuring and impairment charges
Restructuring charges			34
Cost Smart Cost of Sales Program | Mechanical stores
Restructuring and impairment charges
Restructuring charges			8
Cost Smart Cost of Sales Program | Employee-related severance costs
Restructuring and impairment charges
Restructuring charges			3
Cost Smart Cost of Sales Program | Other restructuring costs
Restructuring and impairment charges
Restructuring charges			4
Cost Smart Cost of Sales Program, Production facility closure, Australia
Restructuring and impairment charges
Restructuring charges		15
Cost Smart Cost of Sales Program, Production facility closure, Australia | Forecast | Minimum
Restructuring and impairment charges
Restructuring charges	$ 10
Cost Smart Cost of Sales Program, Production facility closure, Australia | Forecast | Maximum
Restructuring and impairment charges
Restructuring charges	$ 12
Cost Smart Cost of Sales Program, Production facility closure, Australia | Accelerated depreciation
Restructuring and impairment charges
Restructuring charges		10
Cost Smart Cost of Sales Program, Production facility closure, Australia | Employee-related severance costs
Restructuring and impairment charges
Restructuring charges		4
Cost Smart Cost of Sales Program, Production facility closure, Australia | Other restructuring costs
Restructuring and impairment charges
Restructuring charges		1
Cost Smart Cost of Sales Program, South America | Employee-related severance costs
Restructuring and impairment charges
Restructuring charges		3
Cost Smart Cost of Sales Program, North America
Restructuring and impairment charges
Restructuring charges		11
Cost Smart Cost of Sales Program, North America | Cessation of wet-milling
Restructuring and impairment charges
Restructuring charges		2
Expected additional costs		0
Cost Smart SG&A Program
Restructuring and impairment charges
Restructuring charges		28	11
Cost Smart SG&A Program | South America, APAC and North America segments
Restructuring and impairment charges
Restructuring charges			7
Cost Smart SG&A Program | Employee-related severance costs
Restructuring and impairment charges
Restructuring charges		13
Cost Smart SG&A Program | Employee-related severance costs | South America, APAC and North America segments
Restructuring and impairment charges
Restructuring charges			6
Cost Smart SG&A Program | Employee-related severance and other costs
Restructuring and impairment charges
Restructuring charges		28
Cost Smart SG&A Program | Other restructuring costs
Restructuring and impairment charges
Restructuring charges		15
Cost Smart SG&A Program | Consulting fees | South America, APAC and North America segments
Restructuring and impairment charges
Restructuring charges			1
Cost Smart SG&A Program, Latin American Finance Transformation Initiative | South America, APAC and North America segments
Restructuring and impairment charges
Restructuring charges			4
Cost Smart SG&A Program, Latin American Finance Transformation Initiative | Other restructuring costs
Restructuring and impairment charges
Restructuring charges		$ 2
North America Finance Transformation Initiative | Other restructuring costs
Restructuring and impairment charges
Restructuring charges			3
Brazil leaf extraction Process restructuring
Restructuring and impairment charges
Restructuring charges			$ 1	$ 13
Argentina organizational restructuring effort | Employee-related severance and other costs
Restructuring and impairment charges
Restructuring charges				17
North America restructuring plans and prior year restructuring activities | Employee-related severance, other costs and adjustments
Restructuring and impairment charges
Restructuring charges				$ 2

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