Other Income (Expense), Net - Components of Other Income (Expense) (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Component Of Other Income And Expenses [Line Items]
Leasing, contract services and miscellaneous income		$ 51	$ 79	$ 30
Settlement loss	$ 380	381	(18)	(22)
Netherlands Pension Plan [Member]
Component Of Other Income And Expenses [Line Items]
Settlement loss		380
European Union [Member] \| Fluorinated Greenhouse Gas [Member]
Component Of Other Income And Expenses [Line Items]
Leasing, contract services and miscellaneous income		41	67	15
Repauno, New Jersey Sites [Member]
Component Of Other Income And Expenses [Line Items]
Gain on sale of asset		$ 9
East Chicago, Indiana [Member]
Component Of Other Income And Expenses [Line Items]
Gain on sale of asset			3
Repauno New Jersey [Member] \| Land [Member]
Component Of Other Income And Expenses [Line Items]
Gain on sale of asset				13
Linden, New Jersey Sites [Member]
Component Of Other Income And Expenses [Line Items]
Gain on sale of asset			$ 42
Edge Moor, Delaware Site [Member]
Component Of Other Income And Expenses [Line Items]
Gain on sale of asset				$ 12