Restructuring Program - Restructuring Liability Activity (Details) - Simplify to Grow Program - USD ($) $ in Millions	3 Months Ended		71 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020
Restructuring Reserve [Roll Forward]
Liability balance, January 1, 2020	$ 301
Charges	15	$ 20	$ 2,741	[1]
Cash spent	(37)
Non-cash settlements/adjustments	(3)	(29)
Currency	(11)
Liability balance, March 31, 2020	265		265
Severance and related costs
Restructuring Reserve [Roll Forward]
Liability balance, January 1, 2020	301
Charges	14
Cash spent	(37)	$ (53)
Non-cash settlements/adjustments	(2)
Currency	(11)
Liability balance, March 31, 2020	265		265
Asset Write-downs
Restructuring Reserve [Roll Forward]
Liability balance, January 1, 2020	0
Charges	1
Cash spent	0
Non-cash settlements/adjustments	(1)
Currency	0
Liability balance, March 31, 2020	$ 0		$ 0

[1] Includes all charges recorded since program inception on May 6, 2014 through March 31, 2020.