Pension and Postretirement Expense Level 4 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Pension Benefits - U.S. Plans [Member]
Pension Benefits and Non-Pension Postretirement Benefits Disclosures Table Text Block [Line Items]
Service cost	$ 1	$ 1	$ 2	$ 2
Interest cost on projected benefit obligation	3	4	9	10
Expected return on assets	(4)	(4)	(12)	(12)
Amortization of prior service cost (benefit)	2	0	6	0
Recognized actuarial loss	0	1	0	5
Net expense (benefit)	2	2	5	5
Pension Benefits - Non-U.S. Plans [Member]
Pension Benefits and Non-Pension Postretirement Benefits Disclosures Table Text Block [Line Items]
Service cost	2	2	6	6
Interest cost on projected benefit obligation	4	4	13	13
Expected return on assets	(2)	(3)	(9)	(9)
Amortization of prior service cost (benefit)	0	1	0	1
Recognized actuarial loss	0	0	0	0
Net expense (benefit)	4	4	10	11
Non-Pension Postretirement Benefits - U.S. Plans [Member]
Pension Benefits and Non-Pension Postretirement Benefits Disclosures Table Text Block [Line Items]
Service cost	0	0	0	0
Interest cost on projected benefit obligation	0	0	0	0
Expected return on assets	0	0	0	0
Amortization of prior service cost (benefit)	(2)	(3)	(6)	(8)
Recognized actuarial loss	0	0	0	0
Net expense (benefit)	(2)	(3)	(6)	(8)
Non-Pension Postretirement Benefits - Non-U.S. Plans [Member]
Pension Benefits and Non-Pension Postretirement Benefits Disclosures Table Text Block [Line Items]
Service cost	0	0	0	0
Interest cost on projected benefit obligation	0	0	0	0
Expected return on assets	0	0	0	0
Amortization of prior service cost (benefit)	0	0	0	0
Recognized actuarial loss	0	0	0	0
Net expense (benefit)	$ 0	$ 0	$ 0	$ 0