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, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
US Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost — benefits earned during the period	$ 0	$ 1	$ 0	$ 1
Interest cost	5	4	9	9
Expected return on plan assets	(6)	(6)	(12)	(12)
Net amortization:
Actuarial loss	2	2	4	4
Prior service cost (credit)	0	0	0	0
Net pension and postretirement costs	1	1	1	2
Foreign Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost — benefits earned during the period	2	2	4	4
Interest cost	3	5	7	9
Expected return on plan assets	(5)	(5)	(10)	(10)
Net amortization:
Actuarial loss	2	1	4	3
Prior service cost (credit)	0	0	0	0
Net pension and postretirement costs	2	3	5	6
US Postretirement
Defined Benefit Plan Disclosure [Line Items]
Service cost — benefits earned during the period	0	0	0	0
Interest cost	2	3	3	4
Expected return on plan assets	0	0	0	0
Net amortization:
Actuarial loss	1	1	2	2
Prior service cost (credit)	0	(1)	0	(2)
Net pension and postretirement costs	$ 3	$ 3	$ 5	$ 4