Pension and Postretirement Expense Level 4 (Details) - Components of net pension and postretirement expense benefit - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
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	2	3	4	5
Expected return on assets	(4)	(4)	(7)	(8)
Net expense (benefit)	(1)	0	(1)	1
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0	0	0
Pension Benefits - Non-U.S. Plans [Member]
Pension Benefits and Non-Pension Postretirement Benefits Disclosures Table Text Block [Line Items]
Service cost	3	4	7	8
Interest cost on projected benefit obligation	3	2	5	5
Expected return on assets	(2)	(3)	(5)	(6)
Net expense (benefit)	(4)	(3)	(7)	(7)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0	0	0
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)	(1)	0	(1)	0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(1)	0	(1)	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	1	1	1	1
Expected return on assets	0	0	0	0
Net expense (benefit)	(1)	(1)	(1)	(1)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	$ 0	$ 0	$ 0	$ 0