Costs Associated with Rationalization Programs - Narrative (Details) $ in Millions	3 Months Ended			9 Months Ended
	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) employee	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Rationalizations accrual balance		$ 234		$ 234		$ 219
Rationalization payments				96	$ 68
Rationalizations		46	$ 135	102	194
Rationalization reversals		5		7
Rationalization charges incurred to date						$ 595
Rationalization charges expected to be incurred in future periods		45		$ 45
Expected number of job reductions | employee				750
Current Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations		26	128	$ 52	171
Expected number of job reductions | employee				400
Number of associates released | employee				100
Prior Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations		20	7	$ 50	23
Number of associates released | employee				1,100
Philippsburg Restructuring
Restructuring Cost and Reserve [Line Items]
Rationalizations accrual balance		118		$ 118
Philippsburg Restructuring | Prior Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations		9		29
SAG Employee Severance
Restructuring Cost and Reserve [Line Items]
Rationalizations accrual balance		36		36
SAG Employee Severance | Current Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations				20
SAG Employee Severance | Prior Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations		9		9
EMEA Restructuring, Manufacturing Employee Severance
Restructuring Cost and Reserve [Line Items]
Rationalizations accrual balance		30		30
EMEA Restructuring, Manufacturing Employee Severance | Prior Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations				9
EMEA Restructuring, SAG Employee Severance
Restructuring Cost and Reserve [Line Items]
Rationalizations accrual balance		17		17
Global Reduction in Force | Current Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations		$ 25		25
Supply Chain Restructuring | Current Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations				$ 7
Amiens Restructuring | Prior Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations			$ 2		$ 11
Amiens Labor Claims | Amiens Restructuring
Restructuring Cost and Reserve [Line Items]
Loss contingency, number of plaintiffs | employee				850
Scenario, Forecast | Philippsburg Restructuring
Restructuring Cost and Reserve [Line Items]
Rationalization payments	$ 65