Restructuring Programs -Reconciliation to The Consolidated Statements of Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Restructuring and Related Activities [Abstract]
Charges against reserve and currency	$ (12)	$ (22)	$ (40)	$ (13)	$ (74)	$ (61)
Effects of foreign currency and other non-cash items	0			2	13	(2)
Restructuring cash payments	$ (12)			$ (11)	$ (61)	$ (63)