Income Taxes - Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Deferred Income Tax Assets
Goodwill and intangible assets	$ 194	$ 195
Inventory reserves, capitalized tax cost and LIFO inventory	30	31
Investments	19	15
Plant and equipment	17	18
Accrued expenses and reserves	36	45
Employee benefit accruals	186	177
Foreign tax credit carryforwards	8	13
Net operating loss carryforwards	451	507
Capital loss carryforwards	89	98
Allowances for uncollectible accounts	10	9
Deferred intercompany deductions		405
Other	32	99
Gross deferred income tax assets	1,072	1,612
Valuation allowances	(418)	(459)
Total deferred income tax assets	654	1,153
Deferred Income Tax Liabilities
Goodwill and intangible assets	(484)	(506)
Inventory reserves, capitalized tax cost and LIFO inventory	(3)	(3)
Investments	(171)	(180)
Plant and equipment	(72)	(64)
Pension liabilities	(19)	(25)
Unrealized loss (gain) on foreign debt instruments	(45)	(19)
Other	(13)	(15)
Gross deferred income tax liabilities	$ (807)	$ (812)