Asset Impairment, Exit and Implementation Costs (Narrative) (Details) - USD ($)	1 Months Ended	3 Months Ended	9 Months Ended		10 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 99,000,000	$ 6,000,000
Charges			52,000,000
Payments for restructuring			119,000,000
Cost Reduction Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		$ 240,000,000	240,000,000		$ 240,000,000
Restructuring charges						$ 121,000,000
Charges					220,000,000
Payments for restructuring	$ 0	38,000,000	110,000,000
Refocus of Innovative Product Efforts [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			12,000,000			272,000,000
Employee Severance [Member] | Cost Reduction Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		210,000,000	210,000,000		210,000,000
Other Restructuring [Member] | Cost Reduction Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		30,000,000	30,000,000		$ 30,000,000
Other Restructuring [Member] | Refocus of Innovative Product Efforts [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges						63,000,000
Asset Impairment and Exit Costs [Member] | Cost Reduction Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 5,000,000	$ 99,000,000
Asset Impairment and Exit Costs [Member] | Refocus of Innovative Product Efforts [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges						$ 209,000,000