Costs Associated with Rationalization Programs - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) employee	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Restructuring Cost and Reserve [Line Items]
Rationalizations accrual balance	$ 100		$ 100		$ 213
Rationalizations	5	$ 46	40	$ 102
Rationalization reversals	1	5	13	7
Rationalization charges incurred to date					$ 730
Rationalization charges expected to be incurred in future periods	12		$ 12
Expected number of positions eliminated | employee			300
Current Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations	1	26	$ 33	52
Expected number of positions eliminated | employee			300
Number of positions eliminated | employee			200
Prior Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations	4	20	$ 7	50
Number of positions eliminated | employee			500
Employee Severance
Restructuring Cost and Reserve [Line Items]
Rationalizations accrual balance	38		$ 38
Employee Severance | Current Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations	1	25	27	20
Employee Severance | Prior Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations		9	3	13
Europe, Middle East, and Africa Restructuring Plan - Manufacturing Employee Severance and Operating Efficiency
Restructuring Cost and Reserve [Line Items]
Rationalizations accrual balance	47		47
EMEA Restructuring, Manufacturing Employee Severance | Prior Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations	2	7	4	11
Philippsburg Restructuring
Restructuring Cost and Reserve [Line Items]
Rationalizations accrual balance	4		4
Philippsburg Restructuring | Prior Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations	$ 2	$ 9	11	29
Europe, Middle East, and Africa Restructuring Plan - Operating Efficiency | Current Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations			$ 6	$ 7
Amiens Restructuring Plan | Amiens Labor Claims
Restructuring Cost and Reserve [Line Items]
Loss contingency, number of plaintiffs | employee			850