Pension, Savings and Other Postretirement Benefit Plans - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Postretirement benefits expense (credit)	$ 2	$ 1	$ (1)	$ 3
Defined contribution plans, contribution expenses	20	$ 28	50	$ 56
Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to funded pension plans in current year	25		25
Contributions to pension plans	4		11
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Curtailment credit (charge)			4
Other Postretirement Benefits | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Settlement charges	5
Other Postretirement Benefits | Non-U.S. | Other (Income) Expense
Defined Benefit Plan Disclosure [Line Items]
Settlement charges	$ 1		$ 3