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Restructuring and Impairment Charges - Employee-related severance (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring accrual
Restructuring charges	$ 16	$ 27	$ 5	$ 3	$ 10	$ 5	$ 5	$ 11	$ 64	$ 38
Goodwill impairment									0	0	$ 0
Indefinite-lived intangible assets impairment									0	0	$ 0
Employee-related severance costs
Restructuring accrual
Balance in severance accrual at beginning of period				$ 11					11
Foreign exchange translation									(3)
Other									1
Payments made to terminated employees									(9)
Balance in severance accrual at end of period	10				$ 11				10	$ 11
Restructuring reserve, Expected to be paid in next 12 months	$ 9								9
Cost Smart Cost of Sales and SG&A Program \| Employee-related severance costs
Restructuring accrual
Restructuring charges									8
Latin American Finance Transformation Initiative \| Employee-related severance costs
Restructuring accrual
Restructuring charges									$ 2