Restructuring (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring accrual
Beginning balance, restructuring reserve	$ 85	$ 85
Charges	92	72	$ 98
Write-down of assets to net realizable value	(60)	(11)
Net cash paid, principally severance and related benefits	(32)	(62)	(24)
Transfers to other accounts	(4)
Other, including foreign exchange translation	(12)	1
Ending balance, restructuring reserve	69	85	85
Restructuring, Additional Information
Carrying value of impaired assets	9	0
Cost of goods sold
Restructuring accrual
Charges	5
Other expense, net
Restructuring accrual
Charges	87
Employee Costs
Restructuring accrual
Beginning balance, restructuring reserve	67	67
Charges	20	45
Net cash paid, principally severance and related benefits	(24)	(49)
Other, including foreign exchange translation	(3)	4
Ending balance, restructuring reserve	60	67	67
Asset Impairment
Restructuring accrual
Charges	60	11
Write-down of assets to net realizable value	(60)	(11)
Other Exit Costs
Restructuring accrual
Beginning balance, restructuring reserve	18	18
Charges	12	16
Net cash paid, principally severance and related benefits	(8)	(13)
Transfers to other accounts	(4)
Other, including foreign exchange translation	(9)	(3)
Ending balance, restructuring reserve	$ 9	$ 18	$ 18