Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Accruals not currently deductible
Employee benefit costs	$ 187	$ 178
Product and other claims	228	204
Miscellaneous accruals	113	98
Pension costs	643	760
Stock-based compensation	203	210
Net operating/capital loss/tax credit carryforwards	71	89
Foreign tax credits		32
Currency translation		59
Inventory	54	51
Other	24
Gross deferred tax assets	1,523	1,681
Valuation allowance	(67)	(81)
Total deferred tax assets	1,456	1,600
Deferred tax liabilities:
Product and other insurance receivables	(7)	(6)
Accelerated depreciation	(521)	(447)
Intangible amortization	(799)	(784)
Currency translation	(35)
Other	(8)	(87)
Total deferred tax liabilities	(1,370)	(1,324)
Net deferred tax assets	$ 86	$ 276