Costs Associated with Rationalization Programs - Net Rationalization Charges Included in Income Before Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restructuring Cost and Reserve [Line Items]
Rationalizations	$ 46	$ 135	$ 102	$ 194
Asset Write-off and Accelerated Depreciation Charges	10	3	39	10
Current Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations	26	128	52	171
Current Year Plans | Associate Severance and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	26	128	51	171
Current Year Plans | Other Exit and Non-Cancelable Lease Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	0	0	1	0
Prior Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations	20	7	50	23
Prior Year Plans | Associate Severance and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	(5)	0	12	10
Prior Year Plans | Benefit Plan Curtailments and Settlements
Restructuring Cost and Reserve [Line Items]
Rationalizations	13	1	14	0
Prior Year Plans | Other Exit and Non-Cancelable Lease Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	$ 12	$ 6	$ 24	$ 13