Pension Plans, Postretirement and Other Employee Benefits - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	3	4	5	7
Expected return on plan assets	0	0	0	0
Net amortization:
Actuarial loss	0	1	1	2
Prior service cost (credit)	(2)	(2)	(4)	(4)
Net pension and postretirement costs (credits)	1	3	2	5
U.S. | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	0	1	1
Interest cost	10	14	20	27
Expected return on plan assets	(16)	(17)	(32)	(34)
Net amortization:
Actuarial loss	1	1	3	2
Prior service cost (credit)	0	0	0	0
Net pension and postretirement costs (credits)	(4)	(2)	(8)	(4)
Non-U.S. | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	6	6	12	12
Interest cost	5	5	9	12
Expected return on plan assets	(4)	(4)	(8)	(9)
Net amortization:
Actuarial loss	2	2	4	3
Prior service cost (credit)	0	0	0	0
Net pension and postretirement costs (credits)	$ 9	$ 9	$ 17	$ 18