Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$ 472	$ 448
Postretirement benefits, including pensions	152	137
Research and development costs	113	89
Expense accruals	54	58
Other tax credits recoverable	67	63
Capital loss carryforwards	40	50
Inventory reserves	18	15
Postemployment and other benefits	8	5
Other	20
Total	944	865
Valuation allowance	(285)	(662)
Deferred tax assets	659	203
Unremitted earnings	(27)	(68)
Intangibles	(29)	(29)
Depreciation	(52)	(43)
Other		(27)
Deferred tax liabilities	(108)	(167)
Net deferred tax assets	$ 551	$ 36