Costs Associated with Rationalization Programs - Net Rationalization Charges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Restructuring Cost and Reserve [Line Items]
Rationalizations	$ 135	$ 20	$ 194	$ 82
Asset Write-off and Accelerated Depreciation Charges	3	3	10	5
Current Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations	128	14	171	50
Current Year Plans | Associate Severance and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	128	11	171	46
Current Year Plans | Other Exit and Non-Cancelable Lease Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	0	3	0	4
Prior Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations	7	6	23	32
Prior Year Plans | Associate Severance and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	0	2	10	18
Prior Year Plans | Benefit Plan Curtailment Loss (Gain)
Restructuring Cost and Reserve [Line Items]
Rationalizations	1	0	0	(1)
Prior Year Plans | Other Exit and Non-Cancelable Lease Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	$ 6	$ 4	$ 13	$ 15