Restructuring (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring accrual
Beginning balance, restructuring reserve		$ 69	$ 85
Charges		69	92	$ 72
Write-down of assets to net realizable value		(17)	(60)
Net cash paid, principally severance and related benefits		(54)	(32)	(62)
Transfers to other accounts	$ (14)	(14)	(4)
Other, including foreign exchange translation		(8)	(12)
Ending balance, restructuring reserve	45	45	69	85
Restructuring, Additional Information
Carrying value of impaired assets	0	0	9
Cost of goods sold
Restructuring accrual
Charges			5
Selling and administrative expense
Restructuring accrual
Charges		2
Other expense, net
Restructuring accrual
Charges		67	87
Employee Costs
Restructuring accrual
Beginning balance, restructuring reserve		47	54
Charges		39	20
Net cash paid, principally severance and related benefits		(37)	(24)
Transfers to other accounts		(14)
Other, including foreign exchange translation		(3)	(3)
Ending balance, restructuring reserve	32	32	47	54
Asset Impairment
Restructuring accrual
Charges		17	60
Write-down of assets to net realizable value		(17)	(60)
Other Exit Costs
Restructuring accrual
Beginning balance, restructuring reserve		22	31
Charges		13	12
Net cash paid, principally severance and related benefits		(17)	(8)
Transfers to other accounts			(4)
Other, including foreign exchange translation		(5)	(9)
Ending balance, restructuring reserve	$ 13	$ 13	$ 22	$ 31