Supplemental Income Statement Information (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended			12 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest expense					$ 529	$ 448	$ 350
Interest income					(29)	(80)	(70)
Loss on extinguishment of debt	$ 10	$ 10
Pension and postretirement net periodic benefit cost (benefit)					(50)	(68)	(73)
Loss on deconsolidation of Venezuelan subsidiary						162
Total					450	462	207
Funded | Qualified and Non-qualified Pension Benefits | United States
Pension and postretirement net periodic benefit cost (benefit)					$ 269	243	$ 244
Pension settlement charge			$ 32			$ 35
Venezuela
Loss on deconsolidation of Venezuelan subsidiary				$ 162