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, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
US Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost — benefits earned during the period	$ 0	$ 0	$ 0	$ 0
Interest cost	2	5	5	9
Expected return on plan assets	(3)	(6)	(7)	(12)
Settlement loss			6	0
Net amortization:
Actuarial loss	2	2	3	4
Prior service cost (credit)	0	0	0	0
Net pension and postretirement costs	1	1	7	1
Foreign Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost — benefits earned during the period	2	2	4	4
Interest cost	3	3	6	7
Expected return on plan assets	(11)	(5)	(15)	(10)
Settlement loss			0	0
Net amortization:
Actuarial loss	3	2	5	4
Prior service cost (credit)	0	0	0	0
Net pension and postretirement costs	(3)	2	0	5
US Postretirement
Defined Benefit Plan Disclosure [Line Items]
Service cost — benefits earned during the period	0	0	0	0
Interest cost	2	2	3	3
Expected return on plan assets	0	0	0	0
Settlement loss			0	0
Net amortization:
Actuarial loss	2	1	3	2
Prior service cost (credit)	(1)	0	(1)	0
Net pension and postretirement costs	$ 3	$ 3	$ 5	$ 5