Pension and Postretirement Benefit Plans - Components of Net Periodic Benefit Costs (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
United States Pension Plans of US Entity, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	$ 19	$ 21
Expected return on plan assets	(29)	(27)
Service cost
Amortization of net actuarial loss	5	3
Net periodic benefit cost (credit)	(5)	(3)
Foreign Pension Plans, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	3	3
Expected return on plan assets
Service cost	1	1
Amortization of net actuarial loss	1
Net periodic benefit cost (credit)	5	4
Foreign Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [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