Asset Impairment and Exit Costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Restructuring Cost and Reserve [Line Items]
Asset impairment and exit costs	$ 23	$ 0	$ 43	$ 0
Additional expected cost	30		30
Severance Costs	15	0	18	0
Asset Impairment Charges	8	0	25	0
Movement in exit cost liabilities
Liability balance, January 1, 2019			0
Charges, net	15	0	18	0
Cash spent	(5)		(8)
Currency/other			0
Liability balance, June 30, 2019	10		10
South And Southeast Asia [Member] | Operating Segments [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs	0	0	3	0
Asset Impairment Charges	0	0	17	0
Movement in exit cost liabilities
Charges, net	0	0	3	0
Latin America & Canada [Member] | Operating Segments [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs	15	0	15	0
Asset Impairment Charges	8	0	8	0
Movement in exit cost liabilities
Charges, net	$ 15	$ 0	$ 15	$ 0