Business Restructuring (Schedule of Restructuring Activity) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 242			$ 242		$ 110
Payments for Restructuring				35	$ 48
Restructuring Reserve, Accrual Adjustment				19
Business restructuring, net	2		$ (12)	175	$ 71
Restructuring Reserve, Translation Adjustment				(8)
2019 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Business restructuring, net	$ 10	$ 184		$ 194