Other Expense (Income), Net - Schedule of Other Expenses (Income), Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Income and Expenses [Abstract]
Non-service related net periodic benefit cost	$ 116	$ 112	$ 154
Interest income	(25)	(23)	(19)
Foreign currency (gains) losses, net	(1)	26	(5)
Net loss (gain) from asset sales	7	10	(513)
Other, net	25	(46)	(103)
Other income, net	$ 122	$ 79	$ (486)