Business Restructuring (Schedule of Restructuring Activity) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 210	$ 91	$ 224	$ 110
Business restructuring, net	7	(3)
Restructuring Reserve, Accrual Adjustment	15	3
Payments for Restructuring	18	15
Restructuring Reserve, Translation Adjustment	(3)	(1)
2019 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Business restructuring, net	$ 22	$ 0