Income Taxes Level 4 (Details) - Deferred Tax Assets and Liabilities - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Assets
Non-pension post-employment	$ 5	$ 5
Accrued and other expenses	94	107
Deferred Tax Assets, Property, Plant and Equipment	2	3
Loss and credit carryforwards	589	599
Intangible Assets, Current	6	6
Pension and postretirement benefit liabilities	51	45
Gross deferred tax assets	747	765
Valuation allowance	(651)	(611)	$ (588)	$ (518)
Net deferred tax asset	96	154
Liabilities [Abstract]
Property, plant and equipment	(71)	(108)
Unrepatriated earnings of foreign subsidiaries	(9)	(25)
Intangible assets	(19)	(20)
Gross deferred tax liabilities	(99)	(153)
Net deferred tax (liability) asset	$ (3)	$ 1