Costs Associated with Rationalization Programs - Net Rationalization Charges Included in Income Before Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Restructuring Cost and Reserve [Line Items]
Rationalizations	$ 27	$ 48	$ 56	$ 59
Asset Write-off and Accelerated Depreciation Charges	21	5	29	7
Current Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations	3	43	26	43
Current Year Plans | Associate Severance and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	2	43	25	43
Current Year Plans | Other Exit and Non-Cancelable Lease Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	1	0	1	0
Prior Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations	24	5	30	16
Prior Year Plans | Associate Severance and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	17	6	17	10
Prior Year Plans | Benefit Plan Curtailment Loss (Gain)
Restructuring Cost and Reserve [Line Items]
Rationalizations	0	(1)	0	(1)
Prior Year Plans | Other Exit and Non-Cancelable Lease Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	$ 7	$ 0	$ 13	$ 7