Pension and Postretirement Benefit Plans - Components of Net Periodic Benefit Cost (Credit) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
United States Pension Plan of US Entity [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 13	$ 13
Expected return on plan assets	(21)	(23)
Service cost
Amortization of net actuarial loss	6	5
Net periodic benefit cost (credit)	(2)	(5)
Foreign Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	2	2
Expected return on plan assets	(1)	(1)
Service cost	1	1
Amortization of net actuarial loss	2	2
Net periodic benefit cost (credit)	4	4
Foreign Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	1	1
Expected return on plan assets
Service cost
Amortization of net actuarial loss
Net periodic benefit cost (credit)	$ 1	$ 1