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Restructuring and Impairment Charges - Employee-related severance (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	9 Months Ended
	Sep. 30, 2019	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Restructuring accrual
Restructuring charges	$ 28			$ 41
Goodwill impairment		$ 0
Indefinite-lived intangible assets impairment		0
Employee-related severance costs
Restructuring accrual
Balance in severance accrual at beginning of period		$ 15	$ 15
Payments made to terminated employees			(11)
Foreign exchange translation			(1)
Balance in severance accrual at end of period			6
Restructuring reserve, Expected to be paid in next 12 months			5
Cost Smart cost of sales and SG&A Program \| Employee-related severance costs
Restructuring accrual
Restructuring charges			$ 3