Organizational Efficiency Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Restructuring and Related Activities [Abstract]
Charge for organizational efficiency plan (Selling, general and administrative expenses)	$ 31	$ 207	$ 0
Charge for organizational efficiency plan (Selling, general and administrative expenses)	$ 24	$ 162	$ 0