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Restructuring Program - Restructuring Liability Activity (Details) - Simplify to Grow Program - USD ($) $ in Millions	3 Months Ended		6 Months Ended		74 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020
Restructuring Reserve [Roll Forward]
Liability balance, January 1, 2020			$ 301
Charges	$ 28	$ 20	43	$ 40	$ 2,769
Cash spent			(69)
Non-cash settlements/adjustments	(11)	(6)	(14)	(35)
Currency			(9)
Liability balance, June 30, 2020	252		252		252
Severance and related costs
Restructuring Reserve [Roll Forward]
Liability balance, January 1, 2020			301
Charges			35
Cash spent	(32)	$ (36)	(69)	$ (89)
Non-cash settlements/adjustments			(6)
Currency			(9)
Liability balance, June 30, 2020	252		252		252
Asset Write-downs
Restructuring Reserve [Roll Forward]
Liability balance, January 1, 2020			0
Charges			8
Cash spent			0
Non-cash settlements/adjustments			(8)
Currency			0
Liability balance, June 30, 2020	$ 0		$ 0		$ 0