Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$ 448	$ 654
Postretirement benefits, including pensions	137	148
Research and development costs	89	110
Expense accruals	58	57
Other tax credits recoverable	63	60
Capital loss carryforwards	50	55
Inventory reserves	15	18
Postemployment and other benefits	$ 5	4
Other		25
Total	$ 865	1,131
Valuation allowance	(662)	(728)
Deferred tax assets	203	403
Unremitted earnings	(68)	(31)
Intangibles	(29)	(41)
Depreciation	(43)	(39)
Other	(27)	(58)
Deferred tax liabilities	(167)	(169)
Net deferred tax assets	$ 36	$ 234