Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Accruals not currently deductible
Employee benefit costs	$ 232	$ 169
Product and other claims	338	280
Miscellaneous accruals	153	119
Pension costs	849	824
Stock-based compensation	231	218
Net operating/capital loss/tax credit carryforwards	148	150
Foreign tax credits	100	66
Currency translation	90
Inventory	54	70
Other	112	113
Gross deferred tax assets	2,307	2,009
Valuation allowance	(135)	(158)
Total deferred tax assets	2,172	1,851
Deferred tax liabilities:
Product and other insurance receivables	(4)
Accelerated depreciation	(607)	(580)
Intangible amortization	(1,023)	(1,021)
Currency translation		(30)
Total deferred tax liabilities	(1,634)	(1,631)
Net deferred tax assets	$ 538	$ 220