Costs Associated with Rationalization Programs - Net Rationalization Charges Included in Income Before Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Restructuring Cost and Reserve [Line Items]
Rationalizations	$ 37	$ 29
Asset Write-off and Accelerated Depreciation Charges	1	8
Current Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations	31	23
Current Year Plans | Associate Severance and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	31	23
Prior Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations	6	6
Prior Year Plans | Associate Severance and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	(2)	0
Prior Year Plans | Other Exit and Non-Cancelable Lease Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	$ 8	$ 6