Costs Associated with Rationalization Programs - Roll-Forward of Liability Balance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Reserve
Beginning Balance	$ 220	$ 81	$ 213
New Charges	156	204	64
Incurred, net of foreign currency translation	(174)	(61)	(177)
Reversed to the Statement of Operations	(2)	(4)	(19)
Ending Balance	200	220	81
Rationalizations
Restructuring Reserve
Curtailments and settlements benefits plan credit	5	5	(1)
Associate-Related Costs
Restructuring Reserve
Beginning Balance	220	80	210
New Charges	129	185	47
Incurred, net of foreign currency translation	(147)	(41)	(158)
Reversed to the Statement of Operations	(2)	(4)	(19)
Ending Balance	200	220	80
Foreign currency translation	12	(2)	(3)
Other Costs
Restructuring Reserve
Beginning Balance	0	1	3
New Charges	27	19	17
Incurred, net of foreign currency translation	(27)	(20)	(19)
Reversed to the Statement of Operations	0	0	0
Ending Balance	0	0	1
Foreign currency translation	$ 0	$ 0	$ 0