Pension and Postretirement Benefit Plans - Components of Net Periodic Benefit Costs (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 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	$ 18	$ 21	$ 56	$ 64
Expected return on plan assets	(29)	(28)	(87)	(84)
Service cost
Amortization of net actuarial loss	5	4	15	11
Net periodic benefit cost (credit)	(6)	(3)	(16)	(9)
Foreign Pension Plans, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	3	3	9	9
Expected return on plan assets				(1)
Service cost	1	1	4	3
Amortization of net actuarial loss	1		3
Net periodic benefit cost (credit)	5	4	16	11
Foreign Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	2	1	4	4
Expected return on plan assets
Service cost
Amortization of net actuarial loss
Net periodic benefit cost (credit)	$ 2	$ 1	$ 4	$ 4