Costs Associated with Rationalization Programs - Schedule of Net Rationalization Charges Included in Income Before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Rationalizations	$ 135	$ 210	$ 114
Asset Write-off and Accelerated Depreciation Charges	40	20	8
Benefit Plan Curtailments and Settlements
Restructuring Cost and Reserve [Line Items]
Rationalizations	13	1	(1)
Current Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations	83	189	73
Current Year Plans | Associate Severance and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	81	188	66
Current Year Plans | Other Exit and Non-Cancelable Lease Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	2	1	7
Prior Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations	52	21	41
Prior Year Plans | Associate Severance and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	9	5	19
Prior Year Plans | Benefit Plan Curtailments and Settlements
Restructuring Cost and Reserve [Line Items]
Rationalizations	13	1	(1)
Prior Year Plans | Other Exit and Non-Cancelable Lease Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	$ 30	$ 15	$ 23