Asset Impairment, Exit and Implementation Costs (Narrative) (Details) - USD ($)	1 Months Ended	3 Months Ended	6 Months Ended		7 Months Ended	12 Months Ended
	Dec. 31, 2018	Jun. 30, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 94,000,000	$ 9,000,000
Charges			51,000,000
Payments for restructuring			86,000,000
Cost Reduction Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		$ 235,000,000	235,000,000		$ 235,000,000
Restructuring charges						$ 121,000,000
Charges					215,000,000
Payments for restructuring	$ 0	50,000,000	72,000,000
Refocus of Innovative Product Efforts [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		12,000,000	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		205,000,000	205,000,000		205,000,000
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		$ 33,000,000	$ 94,000,000
Asset Impairment and Exit Costs [Member] | Refocus of Innovative Product Efforts [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges						$ 209,000,000