Pension and Postretirement Expense Level 4 (Details) - Components of net pension and postretirement expense benefit - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Pension Benefits - U.S. Plans [Member]
Pension Benefits and Non-Pension Postretirement Benefits Disclosures Table Text Block [Line Items]
Service cost	$ 1	$ 1	$ 3	$ 2
Interest cost on projected benefit obligation	2	3	7	9
Expected return on assets	(4)	(5)	(12)	(13)
Net expense (benefit)	(1)	(1)	(2)	(2)
Pension Benefits - Non-U.S. Plans [Member]
Pension Benefits and Non-Pension Postretirement Benefits Disclosures Table Text Block [Line Items]
Service cost	4	3	12	11
Interest cost on projected benefit obligation	3	5	8	13
Expected return on assets	(3)	(4)	(9)	(12)
Net expense (benefit)	4	4	11	12
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
Net expense (benefit)	0	0	0	0
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	1	1
Expected return on assets	0	0	0	0
Net expense (benefit)	$ 0	$ 0	$ 1	$ 1