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, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost — benefits earned during the period	$ 1	$ 0	$ 1	$ 0
Interest cost	4	5	9	10
Expected return on plan assets	(6)	(6)	(12)	(12)
Net amortization:
Actuarial loss	2	2	4	4
Prior service cost	0	0	0	0
Net pension and postretirement costs	1	1	2	2
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost — benefits earned during the period	2	2	4	4
Interest cost	5	4	9	9
Expected return on plan assets	(5)	(5)	(10)	(12)
Net amortization:
Actuarial loss	1	2	3	4
Prior service cost	0	0	0	1
Net pension and postretirement costs	3	3	6	6
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost — benefits earned during the period	0	0	0	0
Interest cost	3	2	4	3
Expected return on plan assets	0	0	0	0
Net amortization:
Actuarial loss	1	1	2	1
Prior service cost	(1)	(2)	(2)	(3)
Net pension and postretirement costs	$ 3	$ 1	$ 4	$ 1