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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]
Rationalizations	$ 21	$ 5	$ 128	$ 40
Asset Write-off and Accelerated Depreciation Charges	1	0	2	2
Current Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations	20	1	123	33
Current Year Plans | Associate Severance and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	17	0	115	32
Current Year Plans | Benefit Plan Termination Benefits
Restructuring Cost and Reserve [Line Items]
Rationalizations	0	0	1	0
Current Year Plans | Other Exit Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	3	1	7	1
Prior Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations	1	4	5	7
Prior Year Plans | Associate Severance and Other Related Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	(2)	1	(2)	(6)
Prior Year Plans | Benefit Plan Termination Benefits
Restructuring Cost and Reserve [Line Items]
Rationalizations	1	0	0	0
Prior Year Plans | Other Exit Costs
Restructuring Cost and Reserve [Line Items]
Rationalizations	$ 2	$ 3	$ 7	$ 13