Business Restructuring (Schedule of Restructuring Activity) (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 308			$ 242	$ 308	$ 242	$ 224	$ 110
Business restructuring, net	$ 0			$ 2	172	175
Restructuring Reserve, Accrual Adjustment					26	19
Payments for Restructuring					98	35
Restructuring Reserve, Translation Adjustment					10	(8)
2019 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges, pretax		$ 176
Business restructuring, net			$ 22		$ 198	$ 194